How to enter Recovery Mode?

[DrJ]

Gentlemen!

I needed to reset the root password on an RPi 4 running ArchLinux ARM as it is lost along with any other password. On Arch/x86 I edit the grub menu for this .. to enter bash at startup.
On Arch/ARM I do not have grub, i.e. that fails.

I can - of course - get hold of the sdcard holding the system and mount it on a different computer. I have already tried to append init=/sbin/bash in cmdline.txt on the boot partition ... but that results in a blank screen ... followd by "no cable connected" message from the monitor.

Any ideas to get some prompt to issue a "passwd" command with root permissions?

Cheers

[graysky]

If you have a 2nd uSD card, you can image that, and then use it to chroot into the partition to change the password. (use arch-chroot from arch-install-scripts).

[DrJ]

Thank you very much for your reply, @graysky ... I will give it a go and report ..
Cheers