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

与使用

systemctl is active

类似，如果服务处于活动状态或出现故障，那么是否可以使用systemctl获得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

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使用带有选项-p和-o的GNU grep，使用systemctl可以获得1小时42分钟的吗

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

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使用带有选项-p和-o的GNU grep

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

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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

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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