Linux 命令说明

mailx                - send and receive Internet mail
wget                 - The non-interactive network downloader.
[                    - bash built-in commands, see bash  
a2p                  - Awk to Perl translator
abrt-action-analyze-backtrace     - Analyzes C/C++ backtrace, generates duplication hash, backtrace rating, and identifies crash function in problem directory DIR.
abrt-action-analyze-c     - Calculate and save UUID for a problem data directory DIR with coredump.
abrt-action-analyze-ccpp-local     - Generates backtrace and search for duplicates
abrt-action-analyze-core     - Extracts builds from a core dump
abrt-action-analyze-oops     - Calculate and save UUID and duplicate hash for a problem data directory DIR with kernel oops.
abrt-action-analyze-python     - Calculate and save UUID and duplicate hash for a problem data directory DIR with Python crash data.
abrt-action-analyze-vmcore     - Extracts the oops message from the kernel core and install the kernel debuginfo if needed
abrt-action-analyze-vulnerability     - Provides assessment of potential exploitability of crash
abrt-action-analyze-xorg     - Calculate and save UUID and duplicate hash for a problem data directory DIR with Xorg backtrace.
abrt-action-check-oops-for-hw-error     - Checks dmesg element, marks problem as not-reportable if hardware error is detected
abrt-action-generate-backtrace     - Analyzes coredump, generates and saves backtrace.
abrt-action-generate-core-backtrace     - Generates coredump-level backtrace
abrt-action-install-debuginfo     - Install debuginfos for build-ids
abrt-action-list-dsos     - Prints out DSO from mapped memory regions.
abrt-action-notify     - Announces a new occurrence of problem via all accessible channels
abrt-action-perform-ccpp-analysis     - Allows users to select acceptable way of core dump analysis
abrt-action-save-kernel-data     - Creates uReport mandatory files for kernel oopses.
abrt-action-save-package-data     - Query package database and save package and component name.
abrt-action-trim-files     - Deletes old problem directories or files in specified directories until they are smaller than specified size.
abrt-applet          - Applet which notifies user when new problems are detected by ABRT
abrt-cli             - List, remove, print, analyze, report problems
abrt-dump-oops       - Extract oops from FILE (or standard input)
abrt-dump-xorg       - Extract Xorg crash from FILE (or standard input)
abrt-handle-upload     - Unpacks and moves problem data.
abrt-merge-pstoreoops     - Scans files for split oops message. Can print and/or delete them.
abrt-watch-log       - Watch log file and run command when it grows or is replaced
abs2rel              - convert absolute path to relative path
ac                   - print statistics about users' connect time
aconnect             - ALSA sequencer connection manager
addr2line            - convert addresses into file names and line numbers.
alias                - bash built-in commands, see bash  
alsaloop             - command-line PCM loopback
alsamixer            - soundcard mixer for ALSA soundcard driver, with ncurses interface
alsaunmute           - a simple script to initialize ALSA sound devices
amidi                - read from and write to ALSA RawMIDI ports
amixer               - command-line mixer for ALSA soundcard driver
aplay                - command-line sound recorder and player for ALSA soundcard driver
aplaymidi            - play Standard MIDI Files
apropos              - search the manual page names and descriptions
ar                   - create, modify, and extract from archives
arch                 - print machine hardware name (same as uname -m)
arecord              - command-line sound recorder and player for ALSA soundcard driver
arecordmidi          - record Standard MIDI Files
as                   - the portable GNU assembler.
aseqdump             - show the events received at an ALSA sequencer port
aseqnet              - ALSA sequencer connectors over network
at                   - queue, examine or delete jobs for later execution
atq                  - queue, examine or delete jobs for later execution
atrm                 - queue, examine or delete jobs for later execution
attr                 - extended attributes on XFS filesystem objects
audit2allow          - generate SELinux policy allow/dontaudit rules from logs of denied operations
audit2why            - generate SELinux policy allow/dontaudit rules from logs of denied operations
awk                  - pattern scanning and processing language
baobab               - A graphical tool to analyze disk usage
base64               - base64 encode/decode data and print to standard output
basename             - strip directory and suffix from filenames
bash                 - GNU Bourne-Again SHell
bashbug              - report a bug in bash
bashbug-64           - report a bug in bash
batch                - queue, examine or delete jobs for later execution
bc                   - An arbitrary precision calculator language
bdftopcf             - convert X font from Bitmap Distribution Format to Portable Compiled Format
bdftruncate          - generate truncated BDF font from ISO 10646-1-encoded BDF font
bg                   - bash built-in commands, see bash  
blkparse             - produce formatted output of event streams of block devices
blkrawverify         - verifies an output file produced by blkparse
bluetooth-sendto     - GTK application for transferring files over Bluetooth
bluetooth-wizard     - GTK wizard for setting up devices with the Linux Bluetooth stack
bond2team            - Converts bonding configuration to team
brltty               - refreshable braille display driver for Linux/Unix
btt                  - analyse block i/o traces produces by blktrace
build-classpath      - build a Java CLASSPATH
build-jar-repository     - create a symbolic link to a JAR
bunzip2              - a block-sorting file compressor, v1.0.6
bzcat                - decompresses files to stdout
bzcmp                - compare bzip2 compressed files
bzdiff               - compare bzip2 compressed files
bzgrep               - search possibly bzip2 compressed files for a regular expression
bzip2                - a block-sorting file compressor, v1.0.6
bzip2recover         - recovers data from damaged bzip2 files
bzless               - file perusal filter for crt viewing of bzip2 compressed text
bzmore               - file perusal filter for crt viewing of bzip2 compressed text
c2ph                 - Dump C structures as generated from "cc - g - S" stabs
cal                  - display a calendar
cancel               - cancel jobs
cat                  - concatenate files and print on the standard output
cd                   - bash built-in commands, see bash  
cd-create-profile     - Color Manager Profile Creation Tool
cd-drive             - show CD-ROM drive characteristics
cd-fix-profile       - Color Manager Testing Tool
cd-info              - shows Information about a CD or CD-image
cd-paranoia          - 9.8 (Paranoia release III via libcdio) - an audio CD reading utility which includes extra data verification features
cd-read              - reads Information from a CD or CD-image
cdrecord             - write data to optical disk media
certtool             - GnuTLS certificate tool
certutil             - Manage keys and certificate in both NSS databases and other NSS tokens
c++filt              - Demangle C++ and Java symbols.
chacl                - change the access control list of a file or directory
chage                - change user password expiry information
chattr               - change file attributes on a Linux file system
chcon                - change file SELinux security context
checkisomd5          - check an MD5 checksum implanted by implantisomd5
cheese               - tool to take pictures and videos from your webcam
chfn                 - change your finger information
chgrp                - change group ownership
chmod                - change file mode bits
chown                - change file owner and group
chronyc              - command-line interface for chronyd
chrt                 - manipulate the real-time attributes of a process
chsh                 - change your login shell
chvt                 - change foreground virtual terminal
cifsiostat           - Report CIFS statistics.
ciptool              - Bluetooth Common ISDN Access Profile (CIP)
cksum                - checksum and count the bytes in a file
clear                - clear the terminal screen
cmp                  - compare two files byte by byte
cmsutil              - Performs basic cryptograpic operations, such as encryption and decryption, on Cryptographic Message Syntax (CMS) messages.
col                  - filter reverse line feeds from input
colcrt               - filter nroff output for CRT previewing
colormgr             - Color Manager Testing Tool
colrm                - remove columns from a file
column               - columnate lists
comm                 - compare two sorted files line by line
command              - bash built-in commands, see bash  
cp                   - copy files and directories
cpio                 - copy files to and from archives
cpupower             - Shows and sets processor power related values
crlutil              - List, generate, modify, or delete CRLs within the NSS security database file(s) and list, create, modify or delete certificates entries in a particular ...
crontab              - maintains crontab files for individual users
csh                  - C shell with file name completion and command line editing
csplit               - split a file into sections determined by context lines
cupstestdsc          - test conformance of postscript files
cupstestppd          - test conformance of ppd files
curl                 - transfer a URL
cut                  - remove sections from each line of files
cvt                  - calculate VESA CVT mode lines
danetool             - GnuTLS DANE tool
date                 - print or set the system date and time
dbilogstrip          - filter to normalize DBI trace logs for diff'ing
dbiprof              - command-line client for DBI::ProfileData
dbiproxy             - A proxy server for the DBD::Proxy driver
dbpmda               - debugger for Performance Co-Pilot PMDAs
dbus-cleanup-sockets     - clean up leftover sockets in a directory
dbus-daemon          - Message bus daemon
dbus-launch          - Utility to start a message bus from a shell script
dbus-monitor         - debug probe to print message bus messages
dbus-send            - Send a message to a message bus
dbus-uuidgen         - Utility to generate UUIDs
dc                   - an arbitrary precision calculator
dconf                - Simple tool for manipulating a dconf database
dd                   - convert and copy a file
deallocvt            - deallocate unused virtual consoles
debuginfo-install     - install debuginfo packages and their dependencies
desktop-file-edit     - Installation and edition of desktop files
desktop-file-install     - Installation and edition of desktop files
desktop-file-validate     - Validate desktop entry files
devdump              - Utility programs for dumping and verifying iso9660 images.
df                   - report file system disk space usage
dfutool              - Device Firmware Upgrade utility
dgawk                - pattern scanning and processing language
diff                 - compare files line by line
diff3                - compare three files line by line
diff-jars            - output the differences between two JAR files
diffpp               - pretty-print diff outputs with GNU enscript
dig                  - DNS lookup utility
dir                  - list directory contents
dircolors            - color setup for ls
dirname              - strip last component from file name
dmesg                - print or control the kernel ring buffer
dnsdomainname        - show the system's DNS domain name
domainname           - show or set the system's NIS/YP domain name
drill                - get (debug) information out of DNS(SEC)
dstat                - versatile tool for generating system resource statistics
du                   - estimate file space usage
dumpiso              - dump IEEE 1394 isochronous channel packets
dumpkeys             - dump keyboard translation tables
dvcont               - send control commands to DV cameras
dvdrecord            - write data to optical disk media
dvd+rw-format        - formatting and blanking DVD and BD media program.
dvipdf               - Convert TeX DVI file to PDF using ghostscript and dvips
echo                 - display a line of text
red                  - line-oriented text editor
ed                   - line-oriented text editor
edid-decode          - Decode EDID data in human-readable format
egrep                - print lines matching a pattern
eject                - eject removable media
elfedit              - Update the ELF header of ELF files.
empathy              - GNOME multi-protocol chat and call client
empathy-accounts     - Accounts configuration dialog for Empathy instant messaging client
enchant              - a spellchecker
enscript             - convert text files to PostScript, HTML, RTF, ANSI, and overstrikes
env                  - run a program in a modified environment
envsubst             - substitutes environment variables in shell format strings
eps2eps              - Ghostscript PostScript "distiller"
eqn                  - format equations for troff or MathML
escputil             - maintain Epson Stylus inkjet printers
espeak               - A multi-lingual software speech synthesizer.
evince               - GNOME document viewer
ex                   - Vi IMproved, a programmers text editor
expand               - convert tabs to spaces
expr                 - evaluate expressions
factor               - factor numbers
fallocate            - preallocate space to a file
false                - do nothing, unsuccessfully
fc                   - bash built-in commands, see bash  
fc-cache             - build font information cache files
fc-cat               - read font information cache files
fc-list              - list available fonts
fc-match             - match available fonts
fc-pattern           - parse and show pattern
fc-query             - query font files
fc-scan              - scan font files or directories
fc-validate          - validate font files
festival             - a text-to-speech system.
festival_client      - client access to festiva; text-to-speech server mode
ffcfstress           - constant force stress test for force-feedback devices
ffmvforce            - force orientation test for force-feedback devices
ffset                - set force-feedback device parameters
fftest               - tests force-feedback devices.
fg                   - bash built-in commands, see bash  
fgconsole            - print the number of the active VT.
fgrep                - print lines matching a pattern
file                 - determine file type
find                 - search for files in a directory hierarchy
find2perl            - translate find command lines to Perl code
find-jar             - find extension JAR or directory
find-repos-of-install     - report which Yum repository a package was installed from
firefox              - a Web browser for X11 derived from the Mozilla browser
firewall-cmd         - firewalld command line client
firewall-config      - firewalld GUI configuration tool
firewall-offline-cmd     - firewalld offline command line client
flock                - manage locks from shell scripts
fmt                  - simple optimal text formatter
fold                 - wrap each input line to fit in specified width
font2c               - Write PostScript Type 0 or Type 1 font as C code
fonttosfnt           - Wrap a bitmap font in a sfnt (TrueType) wrapper
free                 - Display amount of free and used memory in the system
fros                 - universal screencasting frontend with pluggable support for various backends
ftp                  - Internet file transfer program
funzip               - filter for extracting from a ZIP archive in a pipe
fusermount           - mount and unmount FUSE filesystems
gapplication         - D-Bus application launcher
gawk                 - pattern scanning and processing language
gcalccmd             - a console calculator
gcm-calibrate        - GNOME Color Manager Calibrator Tool
gcm-import           - GNOME Color Manager Import Tool
gcm-inspect          - GNOME Color Manager Inspect Tool
gcm-picker           - GNOME Color Manager Color Picker Tool
gcm-viewer           - GNOME Color Manager Profile Viewer Tool
gconftool-2          - GNOME configuration tool
gcore                - Generate a core file of a running program
gdb                  - The GNU Debugger
gdb-add-index        - Add index files to speed up GDB
gdbus                - Tool for working with D-Bus objects
gedit                - text editor for the GNOME Desktop
genisoimage          - create ISO9660/Joliet/HFS filesystem with optional Rock Ridge attributes
genpmda              - Performance Co-Pilot PMDA Generator
geqn                 - format equations for troff or MathML
getent               - get entries from Name Service Switch libraries
getfacl              - get file access control lists
getfattr             - get extended attributes of filesystem objects
getopt               - parse command options (enhanced)
getopts              - bash built-in commands, see bash  
gettext              - translate message
ghostscript          - Ghostscript (PostScript and PDF language interpreter and previewer)
glib-compile-schemas     - GSettings schema compiler
gmake                - GNU make utility to maintain groups of programs
gneqn                - format equations for ascii output
gnome-abrt           - A utility for viewing problems that have occurred with the system
gnome-calculator     - a desktop calculator
gnome-contacts       - Access and store information about contacts
gnome-control-center     - Configure GNOME settings
gnome-dictionary     - Look up words on dictionaries
gnome-disk-image-mounter     - Attach and mount disk images
gnome-disks          - the GNOME Disks application
gnome-documents      - A document manager application for GNOME
gnome-keyring        - The gnome-keyring commandline tool
gnome-keyring-3      - The gnome-keyring commandline tool
gnome-keyring-daemon     - The gnome-keyring daemon
gnome-screenshot     - capture the screen, a window, or an user-defined area and save the snapshot image to a file.
gnome-session        - Start the GNOME desktop environment
gnome-session-inhibit     - inhibit gnome-session functionality
gnome-session-properties     - Configure applications to start on login
gnome-session-quit     - End the current GNOME session
gnome-session-selector     - Selects a session to use with gnome-session
gnome-shell          - Graphical shell for the GNOME desktop
gnome-system-log     - the GNOME System Log Viewer
gnroff               - emulate nroff command with groff
gnutls-cli           - GnuTLS client
gnutls-cli-debug     - GnuTLS debug client
gnutls-serv          - GnuTLS server
gpasswd              - administer /etc/group and /etc/gshadow
gpg                  - OpenPGP encryption and signing tool
gpg2                 - OpenPGP encryption and signing tool
gpg-agent            - Secret key management for GnuPG
gpgconf              - Modify .gnupg home directories
gpg-connect-agent     - Communicate with a running agent
gpgparsemail         - Parse a mail message into an annotated format
gpgv                 - Verify OpenPGP signatures
gpgv2                - Verify OpenPGP signatures
gpg-zip              - Encrypt or sign files into an archive
gpic                 - compile pictures for troff or TeX
gpk-application      - GNOME PackageKit Package Application
gpk-dbus-service     - GNOME PackageKit Session Service
gpk-distro-upgrade     - GNOME PackageKit Distribution Upgrader
gpk-install-catalog     - GNOME PackageKit Catalog Installer
gpk-install-local-file     - GNOME PackageKit Local File Helper
gpk-install-mime-type     - GNOME PackageKit MimeType installer
gpk-install-package-name     - GNOME PackageKit Package Name Helper
gpk-install-provide-file     - GNOME PackageKit Local File Provider
gpk-log              - GNOME PackageKit Software Log Viewer
gpk-prefs            - GNOME PackageKit Update Preferences
gpk-service-pack     - GNOME PackageKit Service Pack Generator and Installer
gpk-update-viewer     - GNOME PackageKit Update Viewer
gprof                - display call graph profile data
grep                 - print lines matching a pattern
groff                - front-end for the groff document formatting system
grops                - PostScript driver for groff
grotty               - groff driver for typewriter-like devices
groups               - print the groups a user is in
growisofs            - combined mkisofs frontend/DVD recording program.
grub2-editenv        - Manage the GRUB environment block.
grub2-file           - Check if FILE is of specified type.
grub2-fstest         - (unknown subject)
grub2-glue-efi       - Create an Apple fat EFI binary.
grub2-kbdcomp        - Generate a GRUB keyboard layout file.
grub2-menulst2cfg     - Convert a configuration file from GRUB 0.xx to GRUB 2.xx format.
grub2-mkfont         - Convert common font file formats into the PF2 format.
grub2-mkimage        - Make a bootable GRUB image.
grub2-mklayout       - Generate a GRUB keyboard layout file.
grub2-mknetdir       - Prepare a GRUB netboot directory.
grub2-mkpasswd-pbkdf2     - Generate a PBKDF2 password hash.
grub2-mkrelpath      - Generate a relative GRUB path given an OS path.
grub2-mkrescue       - Generate a GRUB rescue image using GNU Xorriso.
grub2-mkstandalone     - Generate a standalone image in the selected format.
grub2-render-label     - Render an Apple disk label.
grub2-script-check     - Check GRUB configuration file for syntax errors.
grub2-syslinux2cfg     - Transform a syslinux config file into a GRUB config.
gs                   - Ghostscript (PostScript and PDF language interpreter and previewer)
gsbj                 - Format and print text for BubbleJet printer using ghostscript
gsdj                 - Format and print text for DeskJet printer using ghostscript
gsdj500              - Format and print text for DeskJet 500 BubbleJet using ghostscript
gsettings            - GSettings configuration tool
gsettings-data-convert     - GConf to GSettings data migration
gsf-office-thumbnailer     - office files thumbnailer for the GNOME desktop
gslj                 - Format and print text for LaserJet printer using ghostscript
gslp                 - Format and print text using ghostscript
gsnd                 - Run ghostscript (PostScript and PDF engine) without display
gsoelim              - interpret .so requests in groff input
gstack               - print a stack trace of a running process
gst-feedback-0.10     - generate debug info for GStreamer bug reports
gst-inspect-1.0      - print info about a GStreamer plugin or element
gst-inspect-0.10     - print info about a GStreamer plugin or element
gst-launch-1.0       - build and run a GStreamer pipeline
gst-launch-0.10      - build and run a GStreamer pipeline
gst-typefind-1.0     - print Media type of file
gst-typefind-0.10     - print MIME type of file
gst-xmlinspect-0.10     - print info about a GStreamer plugin or element
gst-xmllaunch-0.10     - build and run a GStreamer pipeline from an XML serialization
gtar                 - manual page for tar 1.26
gtbl                 - format tables for troff
gtf                  - calculate VESA GTF mode lines
gtk-launch           - Launch an application
gtk-query-immodules-2.0-64     - Input method module registration utility
gtk-query-immodules-3.0-64     - Input method module registration utility
gtk-update-icon-cache     - Icon theme caching utility
gtroff               - the troff processor of the groff text formatting system
gunzip               - compress or expand files
gvfs-cat             - Concatenate files
gvfs-copy            - Copy files
gvfs-info            - Show information about files
gvfs-ls              - List files
gvfs-mime            - Get or set mime handlers
gvfs-mkdir           - Create directories
gvfs-monitor-dir     - Monitor directories for changes
gvfs-monitor-file     - Monitor files for changes
gvfs-mount           - Mounts the locations
gvfs-move            - Copy files
gvfs-open            - Open files with the default handler
gvfs-rename          - Rename a file
gvfs-rm              - Delete files
gvfs-save            - Save standard input
gvfs-set-attribute     - Set file attributes
gvfs-trash           - Move files or directories to the trash
gvfs-tree            - List contents of directories in a tree-like format
gzexe                - compress executable files in place
gzip                 - compress or expand files
h2ph                 - convert .h C header files to .ph Perl header files
hcitool              - configure Bluetooth connections
head                 - output the first part of files
hexdump              - display file contents in ascii, decimal, hexadecimal, or octal
host                 - DNS lookup utility
hostid               - print the numeric identifier for the current host
hostname             - show or set the system's host name
hostnamectl          - Control the system hostname
hunspell             - spell checker, stemmer and morphological analyzer
hwloc-annotate       - Add info attributes to a XML topology
hwloc-assembler      - Assemble multiple XML topologies
hwloc-assembler-remote     - Assemble multiple remote host topologies
hwloc-bind           - Launch a command that is bound to specific processors and/or memory, or consult the binding of an existing program
hwloc-calc           - Operate on cpu mask strings and objects
hwloc-distances      - Displays distance matrices
hwloc-distrib        - Build a number of cpu masks distributed on the system
hwloc-gather-topology     - Saves the relevant Linux topology files and the lstopo output for later (possibly offline) usage
hwloc-info           - Show some information about some objects or about a topology
hwloc-ps             - List currently-running processes or threads that are bound
ibus                 - command line utility for ibus
ibus-daemon          - daemon program for ibus
ibus-setup           - configuration program for ibus
ibus-table-createdb     - create ibus-table database from table source
iceauth              - ICE authority file utility
id                   - print real and effective user and group IDs
idevicebackup        - Create or restore backup for devices.
idevicebackup2       - Create or restore backups for devices running iOS 4 or later.
idevicedate          - Display the current date or set it on a device.
idevicedebugserverproxy     - Remote debugging proxy.
idevicediagnostics     - Interact with the diagnostics interface of a device.
ideviceenterrecovery     - Make a device enter recovery mode.
idevice_id           - Prints device name or a list of attached devices.
ideviceimagemounter     - Mount disk images on the device.
ideviceinfo          - Show information about the first connected device.
idevicepair          - Manage pairings with devices and this host.
ideviceprovision     - Manage provisioning profiles on a device.
idevicescreenshot     - Gets a screenshot from the connected device.
idevicesyslog        - Relay syslog of a connected device.
idn                  - Internationalized Domain Names command line tool
iecset               - Set or dump IEC958 status bits
igawk                - gawk with include files
ijsgutenprint.5.2     - Ghostscript driver for Gutenprint
implantisomd5        - implant an MD5 checksum in an ISO9660 image
imsettings-info      - Display information about Input Method
imsettings-list      - Display Input Methods list
imsettings-reload     - Reload imsettings-daemon
imsettings-switch     - Switch Input Method
info                 - read Info documents
infokey              - compile customizations for Info
inputattach          - attach a serial line to an input-layer device
install              - copy files and set attributes
ionice               - set or get process I/O scheduling class and priority
iostat               - Report Central Processing Unit (CPU) statistics and input/output statistics for devices and partitions.
iowatcher            - Create visualizations from blktrace results
ipcalc               - perform simple manipulation of IP addresses
ipcmk                - create various ipc resources
ipcrm                - remove a message queue, semaphore set or shared memory id
ipcs                 - provide information on IPC facilities
iptables-xml         - Convert iptables-save format to XML
isodebug             - print genisoimage debug info from ISO-9660 image
isodump              - Utility programs for dumping and verifying iso9660 images.
isoinfo              - Utility programs for dumping and verifying iso9660 images.
iso-info             - shows Information about an ISO 9660 image
iso-read             - reads portions of an ISO 9660 image
isovfy               - Utility programs for dumping and verifying iso9660 images.
java                 - the Java application launcher
javaws               - a Java Web Start client
jobs                 - bash built-in commands, see bash  
join                 - join lines of two files on a common field
journalctl           - Query the systemd journal
jscal                - joystick calibration and remapping program
jscal-restore        - restores joystick calibration
jscal-store          - stores joystick calibration
jstest               - joystick test program
kbd_mode             - report or set the keyboard mode
keyctl               - Key management facility control
keytool              - Key and Certificate Management Tool
kill                 - terminate a process
killall              - kill processes by name
ksflatten            - flatten a kickstart file
ksh                  - shell, the standard/restricted command and programming language
ksh93                - shell, the standard/restricted command and programming language
ksshell              - an interactive kickstart shell
ksvalidator          - verify the syntax of a kickstart file
ksverdiff            - display the differences in kickstart syntax
last                 - show listing of last logged in users
lastb                - show listing of last logged in users
lastcomm             - print out information about previously executed commands.
lchfn                - Change finger information
lchsh                - Change login shell
ld                   - The GNU linker
ldd                  - print shared library dependencies
ldns-chaos           - give some information about a nameserver
ldns-compare-zones     - read and compare two zonefiles and print differences
ldnsd                - simple daemon example code
ldns-dane            - verify or create TLS authentication with DANE (RFC6698)
ldns-dpa             - DNS Packet Analyzer. Analyze DNS packets in ip trace files
ldns-gen-zone        - read a zonefile and print it while adding DS records and extra RR's
ldns-key2ds          - transform a DNSKEY RR to a DS RR
ldns-keyfetcher      - retrieve the DNSSEC DNSKEYs for a zone
ldns-keygen          - generate a DNSSEC key pair
ldns-mx              - print out the mx record(s) for a domain
ldns-notify          - notify DNS servers that updates are available
ldns-nsec3-hash      - print out the NSEC3 hash for a domain name
ldns-read-zone       - read a zonefile and print it
ldns-resolver        - tries to create a resolver from a resolv.conf file.
ldns-revoke          - sets the revoke bit of a DNSKEY
ldns-rrsig           - print out the inception and expiration dates in human readable form
ldns-signzone        - sign a zonefile with DNSSEC data
ldns-test-edns       - test if dns cache supports EDNS and DNSSEC.
ldns-testns          - simple fake nameserver tool
ldns-update          - send a dynamic update packet
ldns-verify-zone     - read a DNSSEC signed zone and verify it.
ldns-version         - print out the version of the ldns-library and tools on this system
ldns-walk            - Retrieve the contents of a DNSSEC signed zone
ldns-zcat            - reunite (z)split up a zone files
ldns-zsplit          - split up a zone file
less                 - opposite of more
lessecho             - expand metacharacters
lesskey              - specify key bindings for less
lexgrog              - parse header information in man pages
link                 - call the link function to create a link to a file
linux-boot-prober     - Determine boot characteristics of a specified device.
ln                   - make links between files
loadkeys             - load keyboard translation tables
localectl            - Control the system locale and keyboard layout settings
locate               - find files by name
logger               - a shell command interface to the syslog(3) system log module
login                - begin session on the system
loginctl             - Control the systemd login manager
logname              - print user's login name
look                 - display lines beginning with a given string
lp                   - print files
lpoptions            - display or set printer options and defaults
lppasswd             - add, change, or delete digest passwords.
lpq                  - show printer queue status
lpr                  - print files
lprm                 - cancel print jobs
lpstat               - print cups status information
ls                   - list directory contents
lsattr               - list file attributes on a Linux second extended file system
lscpu                - display information about the CPU architecture
lsinitrd             - tool to show the contents of an initramfs image
lslogins             - display information about known users in the system
lsmcli               - libStorageMgmt command line interface
lsmd                 - lsmd
lua                  - Lua interpreter
luac                 - Lua compiler
lzop                 - compress or expand files
machinectl           - Control the systemd machine manager
Mail                 - send and receive Internet mail
mail                 - send and receive Internet mail
mailq                - Postfix to Sendmail compatibility interface
mailq.postfix        - Postfix to Sendmail compatibility interface
make                 - GNU make utility to maintain groups of programs
man                  - an interface to the on-line reference manuals
manpath              - determine search path for manual pages
mattrib              - change MSDOS file attribute flags
mbadblocks           - tests a floppy disk, and marks the bad blocks in the FAT
mcat                 - dump raw disk image
mcd                  - change MSDOS directory
mclasserase          - erase memory cards
mcookie              - generate magic cookies for xauth
mcopy                - copy MSDOS files to/from Unix
mc-tool              - manipulate Mission Control accounts from the command line
mc-wait-for-name     - run until a D-Bus name appears on the session bus
md5sum               - compute and check MD5 message digest
mdel                 - delete an MSDOS file
mdeltree             - recursively delete an MSDOS directory and its contents
mdir                 - display an MSDOS directory
mdu                  - display the amount of space occupied by an MSDOS directory
mergerepo            - Merge multiple repositories together
mesg                 - control write access to your terminal
metacity             - minimal GTK2 Window Manager
metacity-message     - a command to send a message to Metacity
mformat              - add an MSDOS filesystem to a low-level formatted floppy disk
minfo                - print the parameters of a MSDOS filesystem
mkdir                - make directories
mkfifo               - make FIFOs (named pipes)
mkfontdir            - create an index of X font files in a directory
mkfontscale          - create an index of scalable font files for X
mkhybrid             - create ISO9660/Joliet/HFS filesystem with optional Rock Ridge attributes
mkisofs              - create ISO9660/Joliet/HFS filesystem with optional Rock Ridge attributes
mkmanifest           - makes list of file names and their DOS 8+3 equivalent
mknod                - make block or character special files
mkrfc2734            - Make Linux 2.4 IP over IEEE 1394 capable.
mktemp               - create a temporary file or directory
mlabel               - make an MSDOS volume label
mmd                  - make an MSDOS subdirectory
mmount               - mount an MSDOS disk
mmove                - move or rename an MSDOS file or subdirectory
modifyrepo           - Modify a repomd (xml-rpm-metadata) repository
modutil              - Manage PKCS #11 module information within the security module database.
more                 - file perusal filter for crt viewing
mountpoint           - see if a directory is a mountpoint
mousetweaks          - Accessibility enhancements for pointing devices
mpartition           - partition an MSDOS hard disk
mpstat               - Report processors related statistics.
mrd                  - remove an MSDOS subdirectory
mren                 - rename an existing MSDOS file
msgattrib            - attribute matching and manipulation on message catalog
msgcat               - combines several message catalogs
msgcmp               - compare message catalog and template
msgcomm              - match two message catalogs
msgconv              - character set conversion for message catalog
msgen                - create English message catalog
msgexec              - process translations of message catalog
msgfilter            - edit translations of message catalog
msgfmt               - compile message catalog to binary format
msggrep              - pattern matching on message catalog
msghack              - alter PO files in ways
msginit              - initialize a message catalog
msgmerge             - merge message catalog and template
msgunfmt             - uncompile message catalog from binary format
msguniq              - unify duplicate translations in message catalog
mshortname           - shows short name of a file
mshowfat             - shows FAT clusters allocated to file
mtools               - utilities to access DOS disks in Unix.
mtoolstest           - tests and displays the configuration
mtype                - display contents of an MSDOS file
mutter               - Clutter based compositing GTK2 Window Manager
mutter-message       - a command to send a message to Mutter
mv                   - move (rename) files
mzip                 - change protection mode and eject disk on Zip/Jaz drive
nail                 - send and receive Internet mail
namei                - follow a pathname until a terminal point is found
nano                 - Nano's ANOther editor, an enhanced free Pico clone
nautilus             - the GNOME File Manager
nautilus-connect-server     - To Access a remote server
nautilus-sendto      - convenience application to send a file via email
nc                   - Concatenate and redirect sockets
ncat                 - Concatenate and redirect sockets
needs-restarting     - report running processes that have been updated
neqn                 - format equations for ascii output
newaliases           - Postfix to Sendmail compatibility interface
newaliases.postfix     - Postfix to Sendmail compatibility interface
newgrp               - log in to a new group
nfsiostat            - Report input/output statistics for network filesystems (NFS).
ngettext             - translate message and choose plural form
nice                 - run a program with modified scheduling priority
nisdomainname        - show or set the system's NIS/YP domain name
nl                   - number lines of files
nm                   - list symbols from object files
nmcli                - command - line tool for controlling NetworkManager
nm-connection-editor     - network connection editor for NetworkManager
nm-online            - ask NetworkManager whether the network is connected
nmtui                - Text User Interface for controlling NetworkManager
nmtui-connect        - Text User Interface for controlling NetworkManager
nmtui-edit           - Text User Interface for controlling NetworkManager
nmtui-hostname       - Text User Interface for controlling NetworkManager
nohup                - run a command immune to hangups, with output to a non-tty
nproc                - print the number of processing units available
nroff                - emulate nroff command with groff
nsenter              - run program with namespaces of other processes
nslookup             - query Internet name servers interactively
nsupdate             - Dynamic DNS update utility
numfmt               - Convert numbers from/to human-readable strings
objcopy              - copy and translate object files
objdump              - display information from object files.
ocount               - Event counting tool for Linux
ocsptool             - GnuTLS OCSP tool
od                   - dump files in octal and other formats
oddjob_request       - send requests to oddjobd from the command line
oldfind              - search for files in a directory hierarchy
on_ac_power          - test whether the computer is running on line power
opannotate           - produce source or assembly annotated with profile data
oparchive            - produce archive of oprofile data for offline analysis
op-check-perfevents     - checks for kernel perf pmu support
opcontrol            - control OProfile profiling
openvt               - start a program on a new virtual terminal (VT).
operf                - Performance profiler tool for Linux
opgprof              - produce gprof-format profile data
ophelp               - list OProfile events
opimport             - converts sample database files
opreport             - produce symbol or binary image summaries
orbd                 - The Object Request Broker Daemon
orca                 - is a scriptable screen reader
osinfo-db-validate     - Validate libosinfo XML data files
osinfo-detect        - Detect the operating system on installable media or trees
osinfo-install-script     - generate a script for automated installation
osinfo-query         - Query information in the database
os-prober            - Discover bootable partitions on the local system.
p11tool              - GnuTLS PKCS #11 tool
pacat                - Play back or record raw or encoded audio streams on a PulseAudio sound server
pack200              - JAR Packing tool
package-cleanup      - clean up locally installed, duplicate, or orphaned packages
pacmd                - Reconfigure a PulseAudio sound server during runtime
pactl                - Control a running PulseAudio sound server
padsp                - PulseAudio OSS Wrapper
pagesize             - Print supported system page sizes
pam-panel-icon       - A notification area indicator of pam_timestamp status
panelctl             - manual page for panelctl (libavc1394) 0.1
pango-querymodules-64     - Module registration utility
pango-view           - Pango text viewer
paplay               - Play back audio files on a PulseAudio sound server
paps                 - UTF-8 to PostScript converter using Pango
passwd               - update user's authentication tokens
paste                - merge lines of files
pasuspender          - Temporarily suspend PulseAudio
pathchk              - check whether file names are valid or portable
pax11publish         - PulseAudio X11 Credential Utility
pbm2ppa              - convert portable bitmap (PBM) to HP's Printing Performance Architecture (PPA) file format
pcp                  - run a command or summarize an installation
pdf2dsc              - generate a PostScript page list of a PDF document
pdf2ps               - Ghostscript PDF to PostScript translator
pdfdetach            - Portable Document Format (PDF) document embedded file extractor (version 3.03)
pdffonts             - Portable Document Format (PDF) font analyzer (version 3.03)
pdfimages            - Portable Document Format (PDF) image extractor (version 3.03)
pdfinfo              - Portable Document Format (PDF) document information extractor (version 3.03)
pdfseparate          - Portable Document Format (PDF) page extractor
pdftocairo           - Portable Document Format (PDF) to PNG/JPEG/TIFF/PDF/PS/EPS/SVG using cairo
pdftohtml            - program to convert PDF files into HTML, XML and PNG images
pdftoppm             - Portable Document Format (PDF) to Portable Pixmap (PPM) converter (version 3.03)
pdftops              - Portable Document Format (PDF) to PostScript converter (version 3.03)
pdftotext            - Portable Document Format (PDF) to text converter (version 3.03)
pdfunite             - Portable Document Format (PDF) page merger
peekfd               - peek at file descriptors of running processes
perf                 - Performance analysis tools for Linux
perl                 - The Perl 5 language interpreter
perlbug              - how to submit bug reports on Perl
perldoc              - Look up Perl documentation in Pod format.
perlthanks           - how to submit bug reports on Perl
pf2afm               - Make an AFM file from Postscript (PFB/PFA/PFM) font files using ghostscript
pfbtopfa             - Convert Postscript .pfb fonts to .pfa format using ghostscript
pftp                 - Internet file transfer program
pgawk                - pattern scanning and processing language
pgrep                - look up or signal processes based on name and other attributes
pic                  - compile pictures for troff or TeX
piconv               - - iconv   , reinvented in perl
pidstat              - Report statistics for Linux tasks.
pinfo                - curses based lynx-style info browser
pinky                - lightweight finger
pitchplay            - wrapper script to play audio tracks with cdda2wav with different pitches through a soundcard (cdda2wav must have soundcard support enabled).
pk12util             - Export and import keys and certificate to or from a PKCS #12 file and the NSS database
pkaction             - Get details about a registered action
pkcheck              - Check whether a process is authorized
pkcon                - PackageKit console client
pkexec               - Execute a command as another user
pkg-config           - Return metainformation about installed libraries
pkgenpack            - PackageKit Pack Generator
pkill                - look up or signal processes based on name and other attributes
pkmon                - PackageKit console client
pkttyagent           - Textual authentication helper
pl2pm                - Rough tool to translate Perl4 .pl files to Perl5 .pm modules.
play                 - Sound eXchange, the Swiss Army knife of audio manipulation
plymouth             - Send commands to plymouthd
pmafm                - Performance Co-Pilot archive folio manager
pmap                 - report memory map of a process
pmatop               - System & Process Monitor
pmclient             - a simple performance metrics client
pmcollectl           - collect data that describes the current system status
pmdate               - display an offset date
pmdbg                - translate Performance Co-Pilot debug control flags
pmdiff               - compares archives and report significant differences
pmdumplog            - dump internal details of a performance metrics archive log
pmerr                - translate Performance Co-Pilot error codes into error messages
pmevent              - report event record details
pmfind               - find PCP services on the network
pmgenmap             - generate C code to simplify handling of performance metrics
pmie                 - inference engine for performance metrics
pmie2col             - convert pmie output to multi-column format
pmieconf             - display and set configurable pmie rule variables
pminfo               - display information about performance metrics
pmiostat             - performance metrics value dumper
pm-is-supported      - Test whether suspend or hibernate is supported.
pmlc                 - configure active Performance Co-Pilot pmlogger(s) interactively
pmlogcheck           - checks for invalid data in a PCP archive
pmlogextract         - reduce, extract, concatenate and merge Performance Co-Pilot archives
pmlogger             - create archive log for performance metrics
pmloglabel           - check and repair a performance metrics archive label
pmlogmv              - move (rename) Performance Co-Pilot archive files
pmlogsummary         - calculate averages of metrics stored in a PCP archive
pmprobe              - lightweight probe for performance metrics
pmsocks              - shell wrapper for performance monitoring across firewalls
pmstat               - high-level system performance overview
pmstore              - modify performance metric values
pmtrace              - command line performance instrumentation
pmval                - performance metrics value dumper
pnm2ppa              - convert portable anymap (PNM) images to HP's PPA printer format.
pod2html             - convert .pod files to .html files
pod2man              - Convert POD data to formatted *roff input
pod2text             - Convert POD data to formatted ASCII text
pod2usage            - print usage messages from embedded pod docs in files
ppdc                 - cups ppd compiler
ppdhtml              - cups html summary generator
ppdi                 - import ppd files
ppdmerge             - merge ppd files
ppdpo                - ppd message catalog generator
pr                   - convert text files for printing
preconv              - convert encoding of input files to something GNU troff understands
printafm             - Print the metrics from a Postscript font in AFM format using ghostscript
printenv             - print all or part of environment
printf               - format and print data
prlimit              - get and set a process resource limits.
profiles             - A utility to report and change SIDs in registry files
prtstat              - print statistics of a process
ps                   - report a snapshot of the current processes.
ps2ascii             - Ghostscript translator from PostScript or PDF to ASCII
ps2epsi              - generate conforming Encapsulated PostScript
ps2pdf               - Convert PostScript to PDF using ghostscript
ps2pdf12             - Convert PostScript to PDF 1.2 (Acrobat 3-and-later compatible) using ghostscript
ps2pdf13             - Convert PostScript to PDF 1.3 (Acrobat 4-and-later compatible) using ghostscript
ps2pdf14             - Convert PostScript to PDF 1.4 (Acrobat 5-and-later compatible) using ghostscript
ps2pdfwr             - Convert PostScript to PDF without specifying CompatibilityLevel, using ghostscript
ps2ps                - Ghostscript PostScript "distiller"
psed                 - a stream editor
psfaddtable          - add a Unicode character table to a console font
psfgettable          - extract the embedded Unicode character table from a console font
psfstriptable        - remove the embedded Unicode character table from a console font
psfxtable            - handle Unicode character tables for console fonts
psktool              - GnuTLS PSK tool
pstack               - print a stack trace of a running process
pstree               - display a tree of processes
pstruct              - Dump C structures as generated from "cc - g - S" stabs
ptx                  - produce a permuted index of file contents
pulseaudio           - The PulseAudio Sound System
pwd                  - print name of current/working directory
pwdx                 - report current working directory of a process
pwmake               - simple tool for generating random relatively easily pronounceable passwords
pwscore              - simple configurable tool for checking quality of a password
python               - an interpreted, interactive, object-oriented programming language
python2              - an interpreted, interactive, object-oriented programming language
python2.7            - an interpreted, interactive, object-oriented programming language
qemu-img             - QEMU disk image utility
quota                - display disk usage and limits
quotasync            - synchronize in-kernel file system usage and limits to disk format
ranlib               - generate index to archive.
rz                   - XMODEM, YMODEM, ZMODEM (Batch) file receive
rdate                - get the time via the network
read                 - bash built-in commands, see bash  
readcd               - read or write data Compact Discs
readelf              - Displays information about ELF files.
readlink             - print resolved symbolic links or canonical file names
readmult             - a multitrack wrapper for cdda2wav
readom               - read or write data Compact Discs
realpath             - print the resolved path
rebuild-jar-repository     - rebuild a JAR repository
rec                  - Sound eXchange, the Swiss Army knife of audio manipulation
recode-sr-latin      - convert Serbian text from Cyrillic to Latin script
rename               - rename files
renice               - alter priority of running processes
repoclosure          - display a list of unresolved dependencies for a yum repository
repodiff             - list differences between two or more Yum repositories
repo-graph           - output a full package dependency graph in dot format
repomanage           - list the newest or oldest RPM packages in a directory
repoquery            - query information from Yum repositories
repo-rss             - generates an RSS feed from one or more Yum repositories
report-cli           - Work with ABRT problem directories from command line.
reporter-bugzilla     - Reports problem to Bugzilla.
reporter-mailx       - Sends contents of a problem directory via email.
reporter-rhtsupport     - Reports problem to RHTSupport.
reporter-upload      - Uploads compressed tarball of problem directory.
reporter-ureport     - Reports ABRT problems in format of micro report
report-gtk           - GUI tool to analyze and report ABRT problems
reposync             - synchronize yum repositories to a local directory
repotrack            - track a package and its dependencies and download them
reset                - terminal initialization
rev                  - reverse lines of a file or files
rfcomm               - RFCOMM configuration utility
rhino                - invokes the JavaScript shell for running scripts in batch mode or interactive
rm                   - remove files or directories
rmdir                - remove empty directories
rmid                 - The Java RMI Activation System Daemon
rmiregistry          - The Java Remote Object Registry
rnano                - Restricted mode for Nano's ANOther editor, an enhanced free Pico clone
rngtest              - Check the randomness of data using FIPS 140-2 tests
rsvg-convert         - turn SVG files into raster images.
rsync                - a fast, versatile, remote (and local) file-copying tool
runcon               - run command with specified SELinux security context
rvi                  - Vi IMproved, a programmers text editor
rview                - Vi IMproved, a programmers text editor
rvim                 - Vi IMproved, a programmers text editor
s2p                  - a stream editor
sadf                 - Display data collected by sar in multiple formats.
sane-find-scanner     - find SCSI and USB scanners and their device files
sar                  - Collect, report, or save system activity information.
satyr                - create and manipulate problem reports
sz                   - XMODEM, YMODEM, ZMODEM file send
scanimage            - scan an image
scl                  - Setup and run software from Software Collection environment
scp                  - secure copy (remote file copy program)
script               - make typescript of terminal session
scriptreplay         - play back typescripts, using timing information
sdiff                - side-by-side merge of file differences
sdptool              - control and interrogate SDP servers
seahorse             - Passwords and Keys
secon                - See an SELinux context, from a file, program or user input.
secret-tool          - Store and retrieve passwords
sed                  - stream editor for filtering and transforming text
sendiso              - send IEEE 1394 isochronous packets from dump file
seq                  - print a sequence of numbers
servertool           - The Java(TM) IDL Server Tool
sessreg              - manage utmp/wtmp entries for non-init clients
setfacl              - set file access control lists
setfattr             - set extended attributes of filesystem objects
setleds              - set the keyboard leds
setmetamode          - define the keyboard meta key handling
setpriv              - run a program with different Linux privilege settings
setsid               - run a program in a new session
setterm              - set terminal attributes
setup                - A text mode system configuration tool
setup-nsssysinit     - Query or enable the nss-sysinit module
setxkbmap            - set the keyboard using the X Keyboard Extension
sftp                 - secure file transfer program
sg                   - execute command as different group ID
sh                   - GNU Bourne-Again SHell
sha1sum              - compute and check SHA1 message digest
sha224sum            - compute and check SHA224 message digest
sha256sum            - compute and check SHA256 message digest
sha384sum            - compute and check SHA384 message digest
sha512sum            - compute and check SHA512 message digest
show-changed-rco     - show changes in an RPM package
show-installed       - show installed RPM packages and descriptions
showkey              - examine the codes sent by the keyboard
showrgb              - display an rgb color-name database
shred                - overwrite a file to hide its contents, and optionally delete it
shuf                 - generate random permutations
signtool             - Digitally sign objects and files.
signver              - Verify a detached PKCS#7 signature for a file.
size                 - list section sizes and total size.
skill                - send a signal or report process status
slabtop              - display kernel slab cache information in real time
sleep                - delay for a specified amount of time
sliceprint           - slice documents with long lines.
slogin               - OpenSSH SSH client (remote login program)
smbcontrol           - send messages to smbd, nmbd or winbindd processes
snice                - send a signal or report process status
soelim               - interpret .so requests in groff input
sort                 - sort lines of text files
sox                  - Sound eXchange, the Swiss Army knife of audio manipulation
soxi                 - Sound eXchange Information, display sound file metadata
speaker-test         - command-line speaker test tone generator for ALSA
spice-vdagent        - Spice guest agent X11 session agent
splain               - produce verbose warning diagnostics
split                - split a file into pieces
sqlite3              - A command line interface for SQLite version 3
ssh                  - OpenSSH SSH client (remote login program)
ssh-add              - adds private key identities to the authentication agent
ssh-agent            - authentication agent
ssh-copy-id          - use locally available keys to authorise logins on a remote machine
ssh-keygen           - authentication key generation, management and conversion
ssh-keyscan          - gather ssh public keys
ssltap               - Tap into SSL connections and display the data going by
stap-report          - collect system information that is useful for debugging systemtap bugs
start-pulseaudio-kde     - PulseAudio Sound Server KDE Startup Script
start-pulseaudio-x11     - PulseAudio Sound Server X11 Startup Script
startx               - initialize an X session
stat                 - display file or file system status
states               - awk alike text processing tool
stdbuf               - Run COMMAND, with modified buffering operations for its standard streams.
strace               - trace system calls and signals
strace-log-merge     - (unknown subject)
strings              - print the strings of printable characters in files.
strip                - Discard symbols from object files.
stty                 - change and print terminal line settings
su                   - run a command with substitute user and group ID
sum                  - checksum and count the blocks in a file
sync                 - flush file system buffers
synclient            - commandline utility to query and modify Synaptics driver options.
syndaemon            - a program that monitors keyboard activity and disables the touchpad when the keyboard is being used.
system-config-abrt     - GUI tool to configure ABRT
system-config-printer     - configure a CUPS server
system-config-printer-applet     - print job manager
systemctl            - Control the systemd system and service manager
systemd-analyze      - Analyze system boot-up performance
systemd-ask-password     - Query the user for a system password
systemd-cat          - Connect a pipeline or program's output with the journal
systemd-cgls         - Recursively show control group contents
systemd-cgtop        - Show top control groups by their resource usage
systemd-coredumpctl     - Retrieve coredumps from the journal
systemd-delta        - Find overridden configuration files
systemd-detect-virt     - Detect execution in a virtualized environment
systemd-inhibit      - Execute a program with an inhibition lock taken
systemd-machine-id-setup     - Initialize the machine ID in /etc/machine-id
systemd-notify       - Notify service manager about start-up completion and other daemon status changes
systemd-nspawn       - Spawn a namespace container for debugging, testing and building
systemd-run          - Run programs in transient scope or service units
systemd-tty-ask-password-agent     - List or process pending systemd password requests
tabs                 - set tabs on a terminal
tac                  - concatenate and print files in reverse
tail                 - output the last part of files
tailf                - follow the growth of a log file
tar                  - manual page for tar 1.26
taskset              - retrieve or set a process's CPU affinity
tbl                  - format tables for troff
tcsh                 - C shell with file name completion and command line editing
tee                  - read from standard input and write to standard output and files
telnet               - user interface to the TELNET protocol
test                 - check file types and compare values
testlibraw           - run basic functionality tests on libraw1394
testparm             - check an smb.conf configuration file for internal correctness
time                 - time a simple command or give resource usage
timedatectl          - Control the system time and date
timeout              - run a command with a time limit
tload                - graphic representation of system load average
tnameserv            - (unknown subject)
top                  - display Linux processes
totem                - GNOME desktop movie player based on GStreamer
totem-video-thumbnailer     - video thumbnailer for the GNOME desktop
touch                - change file timestamps
tpmtool              - GnuTLS TPM tool
tput                 - initialize a terminal or query terminfo database
tr                   - translate or delete characters
tracker-control      - Manage Tracker processes and data
tracker-import       - Imports Turtle file data into the database
tracker-info         - Retrieve all information available for a certain file.
tracker-search       - Search all content for keywords
tracker-sparql       - Use SparQL to query the Tracker databases.
tracker-stats        - Provides statistics on the data available for querying
tracker-tag          - Add, remove and list tags.
troff                - the troff processor of the groff text formatting system
true                 - do nothing, successfully
truncate             - shrink or extend the size of a file to the specified size
trust                - Tool for operating on the trust policy store
tset                 - terminal initialization
tsort                - perform topological sort
ttmkfdir             - Utility to create fonts.scale files for truetype fonts
tty                  - print the file name of the terminal connected to standard input
ucs2any              - generate BDF fonts containing subsets of ISO 10646-1 codepoints
udisksctl            - The udisks command line tool
ul                   - do underlining
ulockmgr_server      - Lock Manager Server for FUSE filesystems
umask                - bash built-in commands, see bash  
unalias              - bash built-in commands, see bash  
uname                - print system information
unexpand             - convert spaces to tabs
unicode_start        - put keyboard and console in unicode mode
unicode_stop         - revert keyboard and console from unicode mode
uniq                 - report or omit repeated lines
unlink               - call the unlink function to remove the specified file
unpack200            - JAR Unpacking tool
unshare              - run program with some namespaces unshared from parent
unxz                 - Compress or decompress .xz and .lzma files
unzip                - list, test and extract compressed files in a ZIP archive
unzipsfx             - self-extracting stub for prepending to ZIP archives
update-desktop-database     - Build cache database of MIME types handled by desktop files
update-gtk-immodules     - Update GTK+ immodule cache
update-mime-database     - a program to build the Shared MIME-Info database cache
upower               - UPower command line tool
uptime               - Tell how long the system has been running.
usb-devices          - print USB device details
userformat           - A graphical tool to mount, unmount and format filesystems.
userinfo             - A graphical equivilient to chfn.
usermount            - A graphical tool to mount, unmount and format filesystems.
userpasswd           - A graphical tool to allow users to change their passwords.
users                - print the user names of users currently logged in to the current host
usleep               - sleep some number of microseconds
utmpdump             - dump UTMP and WTMP files in raw format
uuidgen              - create a new UUID value
vdir                 - list directory contents
verify_blkparse      - verifies an output file produced by blkparse
verifytree           - verify that a local yum repository is consistent
vi                   - Vi IMproved, a programmers text editor
view                 - Vi IMproved, a programmers text editor
vim                  - Vi IMproved, a programmers text editor
vimdiff              - edit two, three or four versions of a file with Vim and show differences
vimtutor             - the Vim tutor
vinagre              - a remote desktop viewer for the GNOME Desktop
virsh                - management user interface
virt-host-validate     - validate host virtualization setup
virt-pki-validate     - validate libvirt PKI files are configured correctly
virt-xml-validate     - validate libvirt XML files against a schema
vlock                - Virtual Console lock program
vmmouse_detect       - VMware mouse device autodetection tool
vncconfig            - configure and control a VNC server
vncpasswd            - change the VNC password
vstp                 - VisioBraille file transferring
w                    - Show who is logged on and what they are doing.
wait                 - bash built-in commands, see bash  
wall                 - send a message to everybody's terminal.
watch                - execute a program periodically, showing output fullscreen
watchgnupg           - Read and print logs from a socket
wavpack              - encode wav files to wavpack
wc                   - print newline, word, and byte counts for each file
wftopfa              - Convert a Wadalab base font to Postscript .PFA (or .PFB) format using ghostscript
whatis               - display manual page descriptions
whereis              - locate the binary, source, and manual page files for a command
which                - shows the full path of (shell) commands.
whiptail             - display dialog boxes from shell scripts
who                  - show who is logged on
whoami               - print effective userid
wodim                - write data to optical disk media
write                - send a message to another user
wvdial               - PPP dialer with built-in intelligence.
wvdialconf           - build a configuration file for wvdial   
wvgain               - adds ReplayGain information to wavpack files
wvunpack             - decodes wavpack encoded files
xargs                - build and execute command lines from standard input
xauth                - X authority file utility
xbrlapi              - X11 BrlAPI helper for Linux/Unix
xdg-desktop-icon     - command line tool for (un)installing icons to the desktop
xdg-desktop-menu     - command line tool for (un)installing desktop menu items
xdg-email            - command line tool for sending mail using the user's preferred e-mail composer
xdg-icon-resource     - command line tool for (un)installing icon resources
xdg-mime             - command line tool for querying information about file type handling and adding descriptions for new file types
xdg-open             - opens a file or URL in the user's preferred application
xdg-screensaver      - command line tool for controlling the screensaver
xdg-settings         - get various settings from the desktop environment
xdg-user-dir         - Find an XDG user dir
xdg-user-dirs-update     - Update XDG user dir configuration
xdpyinfo             - display information utility for X
xdriinfo             - query configuration information of DRI drivers
xev                  - print contents of X events
xgamma               - Alter a monitor's gamma correction through the X server
xgettext             - extract gettext strings from source
xhost                - server access control program for X
xinit                - X Window System initializer
xinput               - utility to configure and test X input devices
xkbcomp              - compile XKB keyboard description
xkill                - kill a client by its X resource
xlsatoms             - list interned atoms defined on server
xlsclients           - list client applications running on a display
xlsfonts             - server font list displayer for X
xmlcatalog           - Command line tool to parse and manipulate XML or SGML catalog files.
xmllint              - command line XML tool
xmlwf                - Determines if an XML document is well-formed
xmodmap              - utility for modifying keymaps and pointer button mappings in X
Xorg                 - X11R7 X server
xprop                - property displayer for X
xrandr               - primitive command line interface to RandR extension
xrdb                 - X server resource database utility
xrefresh             - refresh all or part of an X screen
xset                 - user preference utility for X
xsetmode             - set the mode for an X Input device
xsetpointer          - set an X Input device as the main pointer
xsetroot             - root window parameter setting utility for X
xsetwacom            - commandline utility to query and modify wacom driver settings.
xsltproc             - command line XSLT processor
xstdcmap             - X standard colormap utility
xvattr               - Query/Set X11 XVideo Setting(s)
xvinfo               - Print out X-Video extension adaptor information
Xvnc                 - the X VNC server
xwininfo             - window information utility for X
xxd                  - make a hexdump or do the reverse.
xz                   - Compress or decompress .xz and .lzma files
xzcat                - Compress or decompress .xz and .lzma files
xzcmp                - compare compressed files
xzdec                - Small .xz and .lzma decompressors
xzdiff               - compare compressed files
xzegrep              - search compressed files for a regular expression
xzfgrep              - search compressed files for a regular expression
xzgrep               - search compressed files for a regular expression
xzless               - view xz or lzma compressed (text) files
xzmore               - view xz or lzma compressed (text) files
yes                  - output a string repeatedly until killed
ypdomainname         - show or set the system's NIS/YP domain name
yum-builddep         - install missing dependencies for building an RPM package
yum-config-manager     - manage yum configuration options and yum repositories
yum-debug-dump       - write system RPM configuration to a debug-dump file
yum-debug-restore     - replay Yum transactions captured in a debug-dump file
yumdownloader        - download RPM packages from Yum repositories
yum-groups-manager     - create and edit yum's group metadata
zcat                 - compress or expand files
zcmp                 - compare compressed files
zdiff                - compare compressed files
zenity               - display GTK+ dialogs
zforce               - force a '.gz' extension on all gzip files
zgrep                - search possibly compressed files for a regular expression
zip                  - package and compress (archive) files
zipcloak             - encrypt entries in a zipfile
zipdetails           - display the internal structure of zip files
zipgrep              - search files in a ZIP archive for lines matching a pattern
zipinfo              - list detailed information about a ZIP archive
zipnote              - write the comments in zipfile to stdout, edit comments and rename files in zipfile
zipsplit             - split a zipfile into smaller zipfiles
zless                - file perusal filter for crt viewing of compressed text
zmore                - file perusal filter for crt viewing of compressed text
znew                 - recompress .Z files to .gz files
zsoelim              - interpret .so requests in groff input
abrt-auto-reporting     - Get or modify the auto reporting option values
abrt-harvest-pstoreoops     - Reconstruct oops from /sys/fs/pstore/* files, create ABRT problems and remove the files
abrt-harvest-vmcore     - Converts VMCores to ABRT problems
abrt-install-ccpp-hook     - Install coredump handler.
abrt-server          - Unix socket for ABRT.
alsactl              - advanced controls for ALSA soundcard driver
biosdevname          - give BIOS-given name of a device
capsh                - capability shell wrapper
chroot               - run command or interactive shell with special root directory
consoletype          - print type of the console connected to standard input
firewalld            - Dynamic Firewall Manager
fuser                - identify processes using files or sockets
genhostid            - generate and set a hostid for the current host
hardlink             - Consolidate duplicate files via hardlinks
init                 - systemd system and service manager
install-info         - update info/dir entries
irqbalance           - distribute hardware interrupts across processors on a multiprocessor system
kpatch               - hot patch module management
lchage               - Display or change user password policy
lgroupadd            - Add an user group
lgroupdel            - Delete an user group
lgroupmod            - Modify an user group
lid                  - Display user's groups or group's users
lnewusers            - Create new user accounts
lpasswd              - Change group or user password
luseradd             - Add an user
luserdel             - Delete an user
lusermod             - Modify an user
netreport            - request notification of network interface changes
netscsid             - write data to optical disk media
pk-device-rebind     - Device software reloader
plymouth-set-default-theme     - Set the plymouth theme
postalias            - Postfix alias database maintenance
postcat              - show Postfix queue file contents
postconf             - Postfix configuration utility
postdrop             - Postfix mail posting utility
postfix              - Postfix control program
postkick             - kick a Postfix service
postlock             - lock mail folder and execute command
postlog              - Postfix-compatible logging utility
postmap              - Postfix lookup table management
postmulti            - Postfix multi-instance manager
postqueue            - Postfix queue control
postsuper            - Postfix superintendent
rasdaemon            - RAS daemon to log the RAS events.
runuser              - run a command with substitute user and group ID
sendmail.postfix     - Postfix to Sendmail compatibility interface
setregdomain         - set regulatory domain based on timezone
sgpio                - captive backplane LED control utility
smtp-sink            - multi-threaded SMTP/LMTP test server
smtp-source          - multi-threaded SMTP/LMTP test generator
sosreport            - Collect and package diagnostic and support data
spice-vdagentd       - Spice guest agent daemon
usb_modeswitch       - switch mode of "multi-state" USB devices
usb_modeswitch_dispatcher     - dispatcher not intended for direct invocation.
virt-what            - detect if we are running in a virtual machine