Irked

I have a low level shell, a bit lost on where to priv esc from here. Have found user.txt but no permission, would appreciate a gentle push in the right direction!

EDIT: Got user, that was super fun (thanks for your hints). Time to look more into priv esc now.

EDIT2: Got root. That was a bit harder than expected only because i’m not too familar with the standard linux files. Still learnt a lot though. If anyone is proper struggling I can nudge you in the right direction, just PM me.