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What is the difference between sleep and suspend/hibernate etc? I am not talking about "sleep command"

in flag

This is about Ubuntu 20.04 focal but all distributions would be useful as this is about something that is not well documented.

Some settings (dconf) appear to talk about sleep and some talk about suspend. So somebody thinks they are different. I assume one is a low power state with different levels of offline-ness.

The reason for the question is that an Ubuntu Desktop appears to be going offline when nobody logs in, but stay online when I log in.

UPDATE: "APPEARS TO BE GOING OFFLINE" meaning I can not log in either physically through a wired keyboard and monitor nor through ssh, I have to physically hit the power button on the tower to bring the system back up.

cn flag
Sleep means to do an action when you hibernate or suspend. If it actually says suspend it is not about hibernation. For the meaning of the other 2 see https://askubuntu.com/questions/3369/what-is-the-difference-between-hibernate-and-suspend
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