Transient one-shot timer

Spin up a throwaway timer+service without writing unit files; great for ad-hoc scheduled jobs

systemd-run --on-calendar='*-*-* 03:00:00' --unit=backup /usr/local/bin/backup.sh
tool
systemd26 commands
tags
systemdcitroubleshooting

More systemd commands

  • Runtime resource cap
    systemctl set-property --runtime <unit> MemoryMax=512M CPUQuota=50%

    Apply cgroup limits live without restart; --runtime keeps them volatile (gone on reboot)

  • Pending jobs queue
    systemctl list-jobs

    Show in-flight start/stop jobs to diagnose a hung boot or a unit stuck activating

  • Enable and start service
    systemctl enable --now myapp.service

    Enable at boot and start immediately in one command

  • Show failed units
    systemctl list-units --state=failed

    List all units that are in a failed state

  • Reload unit file after edit
    systemctl daemon-reload && systemctl restart myapp.service

    Reload unit definitions and restart the service

all 26 systemd commands