I've done a little research and these power-related tasks are usually controlled by systemd.

Where can I find a list of the commands to give the services manager to control these kinds of functions?

Is there a manual somewhere where I can search for 'suspend' and find the command to give my system to suspend it?

Thanks
All I can tell you is this https://forum.obarun.org/viewtopic.php?id=1350

But before you test it a couple of times don't rely and trust any unsaved work on the functionality of it.
Systemd takes so long to boot and shutdown that it is essential, with s6/66 it is less so.

I don't ever use this so I have no direct experience with it to give any advise. Just try it, or search the forum a bit more for details.

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