One ultimate question: "describe a project of yours, current or past, personal or or job-related, that you are most proud of". You don't need to ask a professional anything else if he's anywhere near worth his salt; he'll volunteer all the information you could judge him by.

Having that said, most of the questions from "general questions" part come either from assuming that the candidate is dumb and possibly doesn't understand how computers work or from some lousy layman psychology.

Many of the questions further down are incorrectly assigned. "What is an A record?" is not a Linux-related question, and git is hardly a "devops tool".

Very poor list, in my opinion. In an interview you need to assess whether the candidate can do the job. Since the only heuristics available to the interviewer is how the candidate did in the past, the interviewer needs to allow candidate to show what he has done, how, and why.

And just for fun:

> A careless sysadmin executes the following command: chmod 444 /bin/chmod - what do you do to fix this?

My favourite way of fixing it is by running /bin/chmod. It blows minds of most smart-asses who ask this question.