[3] Software Package(Install,Uninstall)

Ubuntu: Deb

RedHat: Rpm

DPKG

tangym@ubuntu:/etc$ dpkg -l | grep openssh --Filter file name with :openssh
ii  openssh-client                         1:5.9p1-5ubuntu1                        secure shell (SSH) client, for secure access to remote machines
tangym@ubuntu:/etc$

Install:

sudo dpkg -i openssh

Unstall:

1) sudo dpkg -r openssh  

2) dpkg --remove openssh

[3] Software Package(Install,Uninstall)

原文：http://yuanzhitang.blog.51cto.com/2769219/1783049