Commands Help : systemctl

•  Query or send control commands to the systemd manager.

[SYNOPSIS] systemctl OPTIONS COMMAND

OPTIONS --all Show all units/properties, including dead/empty ones # systemctl --all --t List only units of a particular type # systemctl -t service COMMAND start Start (activate) one or more units # systemctl start sendmail.service stop Stop (deactivate) one or more units # systemctl stop sendmail.service reload Reload one or more units # systemctl reload sendmail.service restart Start or restart one or more units # systemctl restart sendmail.service status Show runtime status of one or more units # systemctl status sendmail.service enable Enable one or more unit files # systemctl enable sendmail.service disable Disable one or more unit files # systemctl disable sendmail.service