I have found this app. Didn’t test it but you might try it. https://github.com/maforn/TimedShutdownAndroid

On a rooted device or with adb you can execute the command:

sleep 60m && reboot -p

I have tried a yubikey on ubuntu without any problems. Could you please describe what exactly isn’t working

Now, I know. Does that work with older android versions too? I had trouble using adb to uninstall/disable system apps on a samsung phone running android 9. That’s why I recommended rooting.

Well, I just heard this for the first time. Could have saved me a lot of time and trouble.

The first thing you need is root access. Then you can uninstall all google apps (including system apps).

If you want a kali-based live environment, you can follow this tutorial: https://www.kali.org/docs/development/live-build-a-custom-kali-iso/ You can configure a lot of options and most of the building process is just downloading packages.

That might be problem with cloudflare or some other DDOS blocker used by lemmy.world that requires javascript and cookies.

Seems to problem with lemmy.world. I just tried Orbot with jerbora and lemmy.world and I got what you described. On my new account on lemmy.today, it works without any problems. (In fact, I just posted this comment via tor)

Many ARM boards (including raspberry pis) are designed to run with linux. So the manufacturers can customize the kernel and firmware for the boards.

In theory, you could make a XMPP bot that can do all these things. Status information and executing simple commands shouldn’t be that hard but interactive commands might need a custom wrapper.