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Check whether a reboot is required after updates

harmlessDebian and APTubuntu, debian
user@server
if [ -f /var/run/reboot-required ]; then cat /var/run/reboot-required.pkgs; else echo "Kein Neustart vermerkt"; fi

Checks whether the file /var/run/reboot-required exists, and if so, prints the packages from reboot-required.pkgs that triggered the reboot. Typical ones are the kernel, libc6 or systemd. If the file does not exist, a corresponding message appears.

Note: On Debian, not all packages create this file. needrestart is more reliable there, see the entry on services using outdated libraries.

Open question before approval: Unter Debian 12 wird /var/run/reboot-required nicht von allen Paketen angelegt (unter Ubuntu zuverlässig über update-notifier-common). Auf Debian prüfen, ob die Datei nach einem Kernel-Update entsteht, sonst needrestart empfehlen.

Also searched as

  • does the server need a reboot
  • system restart required ubuntu
  • reboot needed after kernel update

Related one-liners

All in Debian and APT

Find services using outdated libraries after updates

#needrestart -r l
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

Remove unused dependencies (apt autoremove)

#apt autoremove
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

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