systemctl list-units --type=service --all

列出所有service類型的unit
systemctl list-units --type=service --all

systemctl 列出所有的系統服務
systemctl list-units 列出所有啟動unit
systemctl list-unit-files 列出所有啟動文件
systemctl list-units –type=service –all 列出所有service類型的unit
systemctl list-units –type=service –all grep cpu 列出 cpu電源管理機制的服務
systemctl list-units –type=target –all 列出所有target

systemctl list-dependencies #查看當前運行級別target(mult-user)啟動了哪些服務

參考：http://www.jianshu.com/p/c56f30513651