Putting computer to sleep via shell

[jim204]

I once was able to put my computer to sleep via a shell command, unfortunately I can't find it anymore. It was a pretty basic command where you specify the sleep time in minutes.

I have tried looking again on the internet, and can't seem to find one now that works simply, every other one I have tried fails to work.

Can someone help me out here please?

[Schwarzer Kater]

Perhaps this is of any help?

https://www.cyberciti.biz/faq/linux-...op-netbook-pc/

[jim204]

Thanks I am sure it will, however, I am wondering if my issues are now stemming from the fact that I may have disabled the sleep option (in the system settings or somewhere). I recall I did something as at the time I didn't want me machine to go into sleep while it was performing a task,

because now when I click on the start menu I don't have a sleep option which should be there?



I have looked under power management in the system settings, but can't find anything obvious in there

[Schwarzer Kater]

What do

sudo systemctl status sleep.target
sudo systemctl status suspend.target
sudo systemctl status suspend-then-hibernate.target
sudo systemctl status hibernate.target

show?

Did you change anything in /usr/share/kubuntu-default-settings/kf5-settings/kdeglobals or in another kdeglobals file?

[jim204]

This is what I get returned and similar for the rest of those commands

sleep.target
Loaded: masked (Reason: Unit sleep.target is masked.)
Active: inactive (dead)


I did a ll on the file below and it looks like it hasn't been touched recently, I don't recall editing any global files
/usr/share/kubuntu-default-settings/kf5-settings/kdeglobals

[Schwarzer Kater]

Then try a sudo systemctl unmask on the targets you need (personally I don't use hibernate on any computer with an SSD as this writes the whole memory to disk and reduces the lifetime of the SSD -> hibernate = "suspend to disk").

I think you need to reboot or at least log out and log in again after this.

[jim204]

that was it thank you! I see the sleep option now showing in the start menu. Will try some examples in the link you originally posted