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Find services using outdated libraries after updates

harmless rootDebian and APTdebian, ubuntu
root@server
needrestart -r l

Inspects running processes for deleted or replaced libraries and compares the running kernel with the installed one. The mode -r l only lists and restarts nothing. Useful after security updates of OpenSSL or libc, to restart individual services instead of the whole server.

Note: needrestart is not preinstalled on Debian (apt install needrestart). Without -r l, it restarts services interactively or automatically depending on its configuration.

Also searched as

  • which services need to be restarted after update
  • restart after openssl update
  • is the old kernel still running

Related one-liners

All in Debian 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

Hold a package at its current version (apt-mark hold)

#apt-mark hold mariadb-server
cautionDebian and APT

Release a held package for updates again

#apt-mark unhold mariadb-server
cautionDebian and APT

Show available package updates

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

Show only pending security updates

$apt list --upgradable 2>/dev/null | grep -- -security
harmlessDebian and APT

Show the changelog of a package

$apt changelog openssl
harmlessDebian and APT

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