systemctl start postfix.service
關閉一個服務:
systemctl stop postfix.service
重啓一個服務:
systemctl restart postfix.service
顯示一個服務的狀態:
systemctl status postfix.service
在開機時啓用一個服務:
systemctl enable postfix.service
在開機時禁用一個服務:
systemctl disable postfix.service
查看服務是否開機啓動:
systemctl is-enabled postfix.service
查看已啓動的服務列表:
systemctl list-unit-files|grep
enabled
查看啓動失敗的服務列表:systemctl --failed