After shutdown -h <time> I see no way to see this scheduled shutdown. Before systemd, I could always see the shutdown process with its arguments using ps(1).
Now, the call to shutdown returns to the shell immediately leaving no process. It probably communicates to the init process 1, but, as usual for systemd, very little or nothing seems to be documented. Or at least it's hidden, so that you cannot find it in reasonable time. I couldn't find any relevant differences with and without a scheduled shutdown in the output of systemctl status --all and systemctl show --all. urs
