Quote Originally Posted by AAEBHolding View Post
Which logs should I check? I am in the rescue mode and mounted the root partition as /mnt.
Can I try to fix it somehow? Running btrfs check --repair /dev/xvda2 doesn't solve the problem. As I wrote, when I then boot regularly the / partion is out of space.
Check down in /var/log for big files, check those for clues (maybe even copy them off to an external drive), especially messages log.

Maybe it's coredumping?


coredumpctl list
If there are old logs you think can be deleted, remove those and see how it goes getting some disk space.