Wake up from suspend to run cron job

Märk Owen · 02-12-2017, 05:02 AM

Hello,

I'm running Debian Jessie (with systemd) on a couple of laptops and I would like them to wake up from their suspend-to-memory states during the night to run a cron job but I don't know how to go about it.

I know about rtcwake but it needs to be the one from which the suspended state originates which isn't what I want. My users send their laptops to sleep and I want the machines to wake up without human intervention.

Any ideas? Thanks!

wpeckham · 02-12-2017, 06:36 AM

Quote:

Originally Posted by Märk Owen

Hello,

I'm running Debian Jessie (with systemd) on a couple of laptops and I would like them to wake up from their suspend-to-memory states during the night to run a cron job but I don't know how to go about it.

I know about rtcwake but it needs to be the one from which the suspended state originates which isn't what I want. My users send their laptops to sleep and I want the machines to wake up without human intervention.

Any ideas? Thanks!

I would set a cron job (using absolute time) on the laptops, and run a job on a server (that does NOT suspend) to poll and wake them using WOL (Wake On Lan). I am not sure that there is not a better way, but on my network that would be fast and easy to set up.

Just out of curiosity, why do you need the laptops to waken in the night?

Märk Owen · 02-12-2017, 07:08 AM

Quote:

Just out of curiosity, why do you need the laptops to waken in the night?

To shut them down. I know it might be a weird request but since these two laptops belong to non techy-users, I KNOW it's gonna fly over their heads if I ask them to shutdown their computers at night.

Thank you for your reply. I'll check and see if these laptops support WOL. The good thing is that I have a server of mine running in the same network.