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Show a service's unit file including overrides

harmlesssystemddebian, ubuntu
Adjust the values, the command updates live
user@server
systemctl cat mariadb

Prints the unit file and all associated drop-ins, each with a comment naming the file path. This shows exactly the configuration systemd actually uses, even when parts have been overridden under /etc/systemd/system/<unit>.d/. Individual effective values are available via systemctl show <unit> -p <Property>.

Also searched as

  • where is the service file
  • show unit file
  • view service configuration
  • which overrides exist for the service

Related one-liners

All in systemd

Change service settings with an override

#systemctl edit mariadb
cautionsystemd

Test the sshd config and reload the SSH service

#sshd -t && systemctl reload ssh
cautionSSH

Enable a service and start it immediately

#systemctl enable --now fail2ban
cautionsystemd

List all running systemd services

$systemctl list-units --type=service --state=running --no-pager
harmlesssystemd

List all services enabled at boot

$systemctl list-unit-files --type=service --state=enabled --no-pager
harmlesssystemd

Permanently limit the size of the systemd journal

#mkdir -p /etc/systemd/journald.conf.d && printf '[Journal]\nSystemMaxUse=500M\n' > /etc/systemd/journald.conf.d/size.conf && systemctl restart systemd-journald
cautionsystemd

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