dpkg: Listing installed packages

Written by Benjamin Cane on 2011-08-27 05:47:00

If you want to check what packages are installed on a debian based machine you can use dpkg.

slize:~# dpkg --list  
Desired=Unknown/Install/Remove/Purge/Hold  
| Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend  
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)  
||/ Name Version Description  
+++-===========================================  
ii adduser 3.110 add and remove users and groups  
ii apache2 2.2.9-10+lenny7 Apache HTTP Server metapackage  
ii apache2-mpm-prefork 2.2.9-10+lenny7 Apache HTTP Server - traditional non-threaded model

Or if you are looking for a specific package you can put the name after the command.

slize:~# dpkg --list apache2  
Desired=Unknown/Install/Remove/Purge/Hold  
| Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend  
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)  
||/ Name Version Description  
+++-=============================================================-ii  
apache2 2.2.9-10+lenny7 Apache HTTP Server metapackage

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Benjamin is a Systems Architect working in the financial services industry focused on platforms that require Continuous Availability. He has been working with Linux and Unix for over 10 years now and has recently published his first book; Red Hat Enterprise Linux Troubleshooting Guide.

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