Timer (systemd)

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• systemctl list-timers
• systemctl cat logrotate.timer
• systemctl cat apt-daily.timer

• systemctl cat apt-daily

[Timer]
OnCalendar=daily
AccuracySec=12h
Persistent=true

[Timer]
OnCalendar=*-*-* 6,18:00
RandomizedDelaySec=12h
Persistent=true 

Related terms

• crontab
• Job scheduler

See also

• Timer (systemd), systemctl list-timers, systemctl cat apt-daily.timer, /lib/systemd/system/, .timer
• Systemd services: systemctl [status | is-active | start | daemon-reload | stop | mask | reload | restart | reboot | enable | disable | cat], systemctl list-units, systemctl list-timers, systemctl --failed, systemctl get-default, systemctl --help, .service, .timer, .socket, systemctl restart elasticsearch.service, systemctl status apt-daily, systemctl status oscapd
• Systemd: systemctl, systemd-journald, journalctl systemd-cat, systemd-logind, systemd-networkd:networkctl, systemd-timesyncd, systemd-resolved, systemd-udevd , Systemd-logind: loginctl, hostnamectl, udevadm, systemd-run, portablectl, systemd-nspawn, systemd resource management, Timer (systemd), systemd logs, /etc/systemd/, systemd services, systemd-mount, /run/systemd/, .service, /usr/lib/systemd/, /usr/lib/systemd/system/, /usr/lib/systemd/system/systemd-resolved.service, /lib/systemd/, machinectl, systemd-oomd, systemd-analyze

https://wiki.ubuntu.com/DebuggingSystemd