apt-get update 获取最新软件列表
apt-get install packageName 安装一个包
apt-cache search package_name 搜索软件包
更改源：
修改/etc/apt/sources.list
如更改163源：
在sources.list文件最顶加入下面信息
deb http://mirrors.163.com/debian wheezy main non-free contrib
deb http://mirrors.163.com/debian wheezy-proposed-updates main contrib non-free
deb-src http://mirrors.163.com/debian wheezy main non-free contrib
deb-src http://mirrors.163.com/debian wheezy-proposed-updates main contrib non-free
deb http://mirrors.163.com/debian-security wheezy/updates main contrib non-free
deb-src http://mirrors.163.com/debian-security wheezy/updates main contrib non-free
deb http://http.us.debian.org/debian wheezy main contrib non-free
deb http://non-us.debian.org/debian-non-US wheezy/non-US main contrib non-free
deb http://security.debian.org wheezy/updates main contrib non-free