Most Linux interviews now describe a broken server and ask how you would fix it. Here are 10 real troubleshooting scenarios, solved step by step with lsof, df, journalctl, ss, ausearch, and dmesg.
Linux interviews used to be full of definition questions, such as what the chmod command does or which file stores user passwords. Those still come up, but more interviewers now describe a server that is misbehaving and ask how you would find the cause, because that is much closer to the real job and much harder to answer from memorised notes.