ubuntu更新12.04源

1.首先备份Ubuntu12.04源列表

 

sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup （备份下当前的源列表）

使用SUDO操作的时候有可能会提示“sudo： 无法解析主机：ebs-40190”，这个时候vim /etc/hosts,新增“127.0.1.1 ebs-40190”就可以了

 

 

2.修改更新源

 

 

 

sudo vim /etc/apt/sources.list （打开Ubuntu 12.04源列表文件）

 

3.把里面的列表替换成下面的列表

 

deb http://mirrors.sohu.com/ubuntu/ precise main restricted
deb-src http://mirrors.sohu.com/ubuntu/ precise main restricted
deb http://mirrors.sohu.com/ubuntu/ precise-updates main restricted
deb-src http://mirrors.sohu.com/ubuntu/ precise-updates main restricted
deb http://mirrors.sohu.com/ubuntu/ precise universe
deb-src http://mirrors.sohu.com/ubuntu/ precise universe
deb http://mirrors.sohu.com/ubuntu/ precise-updates universe
deb-src http://mirrors.sohu.com/ubuntu/ precise-updates universe
deb http://mirrors.sohu.com/ubuntu/ precise multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precise multiverse
deb http://mirrors.sohu.com/ubuntu/ precise-updates multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precise-updates multiverse
deb http://mirrors.sohu.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precise-backports main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ precise-security main restricted
deb-src http://mirrors.sohu.com/ubuntu/ precise-security main restricted
deb http://mirrors.sohu.com/ubuntu/ precise-security universe
deb-src http://mirrors.sohu.com/ubuntu/ precise-security universe
deb http://mirrors.sohu.com/ubuntu/ precise-security multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precise-security multiverse
deb http://extras.ubuntu.com/ubuntu precise main
deb-src http://extras.ubuntu.com/ubuntu precise main

 

4.更新源

 

sudo apt-get update

 

更新过程中可能会出现“W: GPG 错误：http://extras.ubuntu.com precise Release: 由于没有公钥，无法验证下列签名： NO_PUBKEY 16126D3A3E5C1192”。

 

这个时候输入“sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 16126D3A3E5C1192”即可解决。