debian
先要更新系统的软件源：
sudo cp /etc/apt/sources.list /etc/apt/sources.list_bak #备份一下软件源
sudo vi /etc/apt/sources.list
加入如下内容即可
网易163更新服务器：
deb http://mirrors.163.com/debian/ squeeze main non-free contrib
deb http://mirrors.163.com/debian/ squeeze-proposed-updates main non-free contrib
deb-src http://mirrors.163.com/debian/ squeeze main non-free contrib
deb-src http://mirrors.163.com/debian/ squeeze-proposed-updates main non-free contrib
sohu 更新服务器：
deb http://mirrors.sohu.com/debian/ lenny main non-free contrib
deb http://mirrors.sohu.com/debian/ lenny-proposed-updates main non-free contrib
deb-src http://mirrors.sohu.com/debian/ lenny main non-free contrib
deb-src http://mirrors.sohu.com/debian/ lenny-proposed-updates main non-free contrib
然后可以整好更新下系统的源（以下命令是为了更新系统软件源，单独对于安装vim来说，不执行以下命令没有任何影响。）
apt-get update
apt-get upgrade