Just curious, do you expect people from other background to have non-trivial knowledge of Linux admin? The problem is, for sure I can 1) study for a Linux exam or 2) setup a server in homelab, but for 1) most likely I'd forget about most of the knowledge in 1-6 months, and 2) most likely I don't need any advanced knowledge.

Does it eventually fall to whether I have the right connection? Anyway I'm trying to apply with some basic Linux knowledge (it's one of my daily OS), so far without any luck.