How to force reboot a frozen Linux or FreeBSD machine

[stefano@mastodon.bsd.cafe]

How to force reboot a frozen Linux or FreeBSD machine

https://it-notes.dragas.net/2023/01/08/how-to-force-reboot-a-frozen-linux-or-freebsd-servers/

I've just used this...

#Linux #FreeBSD

[anparker@mastodon.bsd.cafe]

@stefano Oh, I remember one for linux. But, sadly, today it's usually go to a web console and hit that 'Reset this VM' button.

[stefano@mastodon.bsd.cafe]

@anparker yes, true...

[kirby@freerobuxextremist.com]

@stefano

[grahamperrin@mastodon.bsd.cafe]

@stefano

"… more likely to happen when dealing with usb attached external interfaces. …"

On the many occasions when I have lost then regained USB connectivity to a mobile hard disk drive that hosts a ZFS pool, and (naturally) it becomes impossible to run any zpool command on the pool:

– there's never an endless freeze.

Restart the OS in the normal way, and be patient. Sometimes very patient.

That was, Kubuntu 25.04 and 25.10 with (OpenZFS-encrypted) root-on-ZFS. I have not yet had an opportunity to play the waiting game with 26.04.

#OpenZFS #USB #Linux #systemd

[stefano@mastodon.bsd.cafe]

@kirby ahahah that's funny!

[feld@friedcheese.us]

@stefano the faster way on Linux is a simple keyboard shortcut: Alt+Sysrq+b

edit: Sysrq key is Print Screen for those who didn't know

edit2: hardly anyone has a keyboard with a Print Screen button anymore though