linux 问题 mkisofs

apt -get install mkisofs
The program 'apt' can be found in the following packages:
* sun-java5-jdk (You will have to enable component called 'multiverse')
* sun-java6-jdk (You will have to enable component called 'multiverse')
Try: apt-get install <selected package>
bash: apt: command not found
root@luanying-laptop:~# apt-get install mkisofs
Reading package lists... Done
Building dependency tree      
Reading state information... Done
Package mkisofs is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  genisoimage
E: Package mkisofs has no installation candidate
root@laptop:~# mkisofs
The program 'mkisofs' is currently not installed.  You can install it by typing:
apt-get install mkisofs
You will have to enable component called 'multiverse'
bash: mkisofs: command not found