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Compare installed and available package versions

harmlessDebian and APTdebian, ubuntu
Adjust the values, the command updates live
user@server
apt-cache policy nginx

Prints the installed version (Installed), the installation candidate (Candidate) and the version table with all sources and their priorities for a package. This shows whether an update is pending and which repository it would come from. Especially useful when several sources offer the same package, such as Debian and a vendor repository.

Note: Without a package name, apt-cache policy shows the priorities of all configured sources.

Also searched as

  • check installed package version debian
  • which repository does a package come from
  • apt-cache policy explained
  • why does apt install the wrong version

Related one-liners

All in Debian and APT

Find modified package configuration files

#debsums -ce
harmlessDebian and APT

Find the package that provides a file not yet installed

$apt-file search bin/mysqldump
harmlessDebian and APT

Find which installed package a file belongs to

$dpkg -S /usr/bin/curl
harmlessDebian and APT

List installed packages sorted by size

$dpkg-query -Wf '${Installed-Size}\t${Package}\n' | sort -rn | head -n 20
harmlessDebian and APT

Show available package updates

#apt update && apt list --upgradable
harmlessDebian and APT

Check whether a reboot is required after updates

$if [ -f /var/run/reboot-required ]; then cat /var/run/reboot-required.pkgs; else echo "Kein Neustart vermerkt"; fi
harmlessDebian and APT

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