使用 systemctl 获取 systemd 进程的正常运行时间或停机时间？

Question

就像使用 systemctl is-active <servicename> 一样，如果服务处于活动状态或失败，那么是否可以使用 systemctl 获取 systemd 服务的正常运行时间或停机时间？

time systemctl status kdm|cat
* kdm.service - LSB: X display manager for KDE
   Loaded: loaded (/etc/init.d/kdm; generated; vendor preset: enabled)
   Active: active (exited) since Wed 2017-06-21 12:03:26 CEST; 1h 42min ago
     Docs: man:systemd-sysv-generator(8)
    Tasks: 0 (limit: 4915)
   CGroup: /system.slice/kdm.service

是否可以使用 systemctl

获取 1h 42min

Answer 1

使用带有选项 -P 和 -o 的 GNU grep

systemctl status kdm | grep -Po ".*; \K(.*)(?= ago)"

Answer 2

使用 systemctl 的属性 WatchdogTimestamp

 blr8-100-208-Vin:~ # systemctl show novell-nss --property WatchdogTimestamp
 WatchdogTimestamp=Tue 2020-11-24 17:30:20 IST

使用 systemctl 获取 systemd 进程的正常运行时间或停机时间？

getting uptime or downtime of systemd process using systemctl?

linux

systemd

systemctl