title: getting uptime or downtime of systemd process using systemctl?
body: <p>like using <code>systemctl is-active &lt;servicename&gt;</code> gives is if service is active or failed then is it possible  to get the uptime or downtime of the systemd service all using systemctl ?</p>
  <pre><code>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
  </code></pre>
  <p>is it possible to get the <strong>1h 42min</strong> using systemctl</p>