Ubuntu 11.10 - Package Management
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Public domain
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### Basics

* List all installed packages


         dpkg -l


* Number of installed packages


         dpkg -l | grep '^ii' | wc -l


* Check if a package installed


         dpkg -l | grep ssh


* List the files installed by a package


         dpkg -L  openssh-server


* Which package installed a file


         dpkg -S /usr/lib/sftp-server

* Install a Package:


         sudo apt-get install nmap


* Remove a Package


         sudo apt-get remove nmap


* Update the Package Index:


         apt-get update


* Upgrade Packages: 


        apt-get upgrade


* apt-get log file


        less /var/log/dpkg.log


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_BY: Pejman Moghadam_  
_TAG: dpkg, apt_  
_DATE: 2011-12-28 12:25:23_