Editing Dpkg

<code>[[Wikipedia:dpkg|dpkg]]</code> ([[1994]]) is a [[package management]] software used among others by Debian operating system. It can be used to install, remove, and provide information about .deb packages.

New package configurations will append a *.dpkg-old OR *.dpkg-dist.

== Basic dpkg commands ==
* Install a .deb package:
** <code>dpkg -i ''filename.deb''</code>
* Remove an installed package:
** <code>dpkg -r ''package_name''</code>

* Get Information about a package
** <code>[[dpkg -s]] ''package_name''</code> (<code>-s --status</code>). See also: <code>[[apt-cache]] policy package_name</code>

* List installed packages in your computer can be obtained with:
** <code> [[dpkg -l]] ''[optional pattern]''</code>
* List files in a package:
** <code>[[dpkg -L]] ''package_name''</code>
** <code>[[dpkg-query]] -L ''package_name''</code>

* Find package owner of a file: 
** <code>dpkg -S `which file_to_search`</code> (-S Search)

* List content of a package, content can be extracted suing <code>[[ar]]</code> command:
** <code>dpkg -c /path/to/package_name.deb</code>

{{dpkg changes}}

* <code>[[dpkg --configure -a]]</code><ref> https://www.ostechnix.com/how-to-fix-e-could-not-get-lock-var-lib-dpkg-lock-error-on-ubuntu/</ref>

* <code>[[dpkg-reconfigure]]</code>, <code>[[dpkg-reconfigure openssh-server]]</code>

=== Example Outputs of dpkg commands ===
* <code>[[dpkg --status]] [[sysstat]]</code> or <code>dpkg -s [[sysstat]]</code>

== Activities ==
===Basic===
# Read <code>[[apt]]</code> and <code>[[snap]]</code> page
# Install a package using [[dkpg]]
# Understand differences between apt and dpkg

=== Advanced ===
# Read <code>uscan</code>https://manpages.debian.org/buster/devscripts/uscan.1.en.html and https://wiki.debian.org/debian/watch to understand how new packages are generated: https://manpages.debian.org/buster/devscripts/uscan.1.en.html
# Learn about <code>[[dpkg -V]]</code> and [[dpkg -C]]</code> options

== See Also ==
* {{apt}}
* {{package managers}}
* {{dpkg}}
* {{snap}}
* [[wikipedia:Deb_(file_format)]] to understand ''.deb'' internal format an included files: ''preinst, postinst, prerm and postrm.''
* [[wikipedia:apt-file]] to view the contents of debian packages on remote repositories

{{CC license}}. Source: https://en.wikiversity.org/wiki/Linux_server_administration/dpkg

[[Category:Server administration]]
[[Category:Operating systems]]
[[Category:Linux]]