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This page is about the ways to list the installed packages in a Debian system and how to create a file with this list. This file can be uploaded to the web (i.e. from other computer with Internet connection) to download new packages.
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=== List all packages installed ===
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{{{
dpkg-query -l
}}}

=== List packages using a search pattern ===

It is possible to add a search pattern to list packages:

{{{
dpkg-query -l 'foo*'
}}}

=== Show status of all packages on the system ===

To check the status of all packages on your system:

{{{
dpkg -l | more
}}}

This will show all packages (1 line each) that are in various stages of install (this includes packages that were removed but not purged). To show only the installed:

{{{
dpkg -l | grep '^i'
}}}

to filter through grep to get results for "i"

You can also use:

{{{
apt-cache pkgnames
}}}
You can if you are using Debian Linux use dpkg command to list installed software:

{{{
dpkg --get-selections
}}}
And store the list installed software to a file called /backup/installed-software.log

{{{
dpkg --get-selections > /backup/installed-software.log
}}}

You can also find package information in the next directories (you can use DebianPkg:mc or other FileManager to browse them):

 * {{{/var/lib/apt/lists/*}}}
 * {{{/var/lib/dpkg/available}}}: list of available packages.
 * {{{/var/lib/dpkg/status}}} :statuses of available packages. This file contains information about whether a package is marked for removing or not, whether it is installed or not, etc. A package marked reinst-required is broken and requires reinstallation.

== Restore installed software ==

After re-installing base system you can immediately re-install all software. You need dselect:

{{{
apt-get install dselect
}}}

Then you have to type following commands:

{{{
dpkg --get-selections > /backup/installed-software.log
dpkg --set-selections < /backup/installed-software.log
}}}
Now your list is imported use apt-get, [[Synaptic]] or other PackageManagement tools. To install the package:

{{{
apt-get dselect-upgrade
}}}

All this with a single command:
{{{
aptitude install $(cat /backup/installed-software.log | awk '{print $1}')
}}}
See [[AptCLI#List_installed_packages]]
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See AptCLI#List_installed_packages

See also


CategoryPackageManagement