How to automate a Wake On Lan command in GRUB2 boot

BorHacker

1/9/24, 3:42 PM

I have 3 computers in my home installation, one (call it FREEBNT) is my server, with Ubuntu server 22.04.1 LTS, acting mainly as a NAS server. Other (call it XAUDIOSERVER) is a Ubuntu Desktop with audio functionality. And the third one (call it TACENS10) is my main PC, where I work, with Windows 10 installed.

All of them are available to Wake up via WOL, and I usually wake them on all because I use all of them at the same time. I can wake them up via a WOL app in my Android phone. But now, what I want to achieve, is to automate a command at TACENS10 boot, so that, when I power on TACENS10, it automatically wakes up the other two computers. I imagine that it could be easier to do with GRUB2 than the Windows 10 bootloader. So I'm available to repartition my hard disk to include a (GRUB2) partition if necessary.

I have searched in google and this forum and I didn't see anything seeming like my problem.

So, is it possible to run a Wake-On-Lan command from GRUB2? and, how do I install and configure GRUB2 to do this task? I (obviously) have the MAC addresses of both computers. Also note, that I don't have Ubuntu installed on my TACENS10, nor I'm planning to do, so I would need to run a Live Ubuntu session and create a boot partition, to include only Windows 10, or maybe if I can, Windows 10 - WakeOnLAN and also Windows 10 - no WakeOnLAN, in case I don't want to wake up the others.

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dummyuser

1/9/24, 4:08 PM

If I understand you correctly you want to start `TACENS10` the this ubuntu serever should start 2 other server via WOL. Ubuntu has a `wakeonlan` packeage that dos WOL. Grub (or grub2) is not the place to do this, but you may write simple service (or cron) that does the job at boot.

BorHacker

1/9/24, 6:06 PM

Yes, I understand, but the only limitation to your idea is that in **TACENS10** I don't have Ubuntu installed, but Windows 10. So I need to use GRUB2. Are you sure I can't do it from GRUB2?

mook765

1/9/24, 7:00 PM

@BorHacker Grub2 doesn't provide such a feature, thus it's not possible to do.

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EN: How to automate a Wake On Lan command in GRUB2 boot

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