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Show all failed systemd units

harmlesssystemddebian, ubuntu
user@server
systemctl --failed --no-pager

Shows all units that failed at startup or during operation, with a short description. After a reboot or update, this tells you at a glance whether everything is running again. An empty list with 0 loaded units listed is the normal state.

Note: Then journalctl -u <unit> -n 50 shows the cause. After fixing it, systemctl reset-failed resets the state.

Also searched as

  • which services have failed
  • show failed services
  • systemctl failed
  • what did not start after reboot

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#systemctl enable --now fail2ban
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List all running systemd services

$systemctl list-units --type=service --state=running --no-pager
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List all services enabled at boot

$systemctl list-unit-files --type=service --state=enabled --no-pager
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Query uptime, memory and restart count of a service

$systemctl show php8.2-fpm -p ActiveState,ActiveEnterTimestamp,MainPID,MemoryCurrent,NRestarts
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Restart a service and check the result

#systemctl restart php8.2-fpm && systemctl is-active php8.2-fpm
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