debian 安装ssh
apt-get install openssh-server
apt-get install ssh
1、配置apt-get源
cp /etc/apt/sources.list /etc/apt/sources.listbak #备份原有配置文件
nano /etc/apt/sources.list #编辑
注释掉本地光盘源这一行：
deb cdrom:[Debian GNU/Linux 6.0.4 _Squeeze_ - Official i386 DVD Binary-1 20120128-12:53]/ squeeze contrib main
取消下面两行官方源前面的注释，添加以下代码：
deb http://mirrors.163.com/debian/ squeeze main non-free contrib
deb http://mirrors.163.com/debian/ squeeze-proposed-updates main contrib non-free
deb http://mirrors.163.com/debian-security/ squeeze/updates main contrib non-free
deb-src http://mirrors.163.com/debian/ squeeze main non-free contrib
deb-src http://mirrors.163.com/debian/ squeeze-proposed-updates main contrib non-free
deb-src http://mirrors.163.com/debian-security/ squeeze/updates main contrib non-free
deb http://ftp.sjtu.edu.cn/debian/ squeeze main non-free contrib
deb http://ftp.sjtu.edu.cn/debian/ squeeze-proposed-updates main contrib non-free
deb http://ftp.sjtu.edu.cn/debian-security/ squeeze/updates main contrib non-free
deb-src http://ftp.sjtu.edu.cn/debian/ squeeze main non-free contrib
deb-src http://ftp.sjtu.edu.cn/debian/ squeeze-proposed-updates main contrib non-free
deb-src http://ftp.sjtu.edu.cn/debian-security/ squeeze/updates main contrib non-free
ctrl+o #保存配置
ctrl+x #退出
apt-get update #更新源
2、查看更新的包
apt-cache search ssh
3、安装SSH服务
apt-get install openssh-server #安装ssh服务