I had five interviews over the course of about 1.5 months.

One was with HR, followed by the hiring manager, two technical interviews, and one with the director.

At the end, I was told my Linux skills were not sufficient. If that's the case, then why move me on to the final round of interviews with the Director?

Regarding the final interview, this person was 10 minutes late and very rude. They showed clear frustration and anger that they had to interview me, despite already meeting with the hiring manager.

They drilled me as if it were another technical interview, then at the end, while I was thanking this person, they just got up and started leaving the room while I was still talking and didn't seem to care.

This was a complete waste of my time.

This whole process left a bad impression. Even after getting rejected, the HR person told me that the team thinks I would be a great fit for a Technical Support Engineer position.

That position is almost purely Linux; you have to know the ins and outs of that. Nothing made sense to me at all.

How do you set up a DNS server?

How would you further troubleshoot a server that wasn't working, even after using systemctl to start it?