Either we have abstracted away the operating system so this is a non-issue or those candidates are simply not qualified.

If you’re senior then I would definitely expect you to know those commands, if you’re senior you’ve been around long enough that they were relevant. Even if they’re not now.

Actually, a lot of the people new to DevOps who come from the Dev side don't know the Linux internals. All they know is TF/CF, k8s, Docker and either AWS or GCP. If you asked them to set up a raid array they'd look at you like you just grew a second head. If you asked them how to tell what modules the kernel was running, they wouldn't be able to find out without a lot of googling.

The fact that DevOps does encompass a lot of fundamental Linux system knowledge is glossed over by a lot of people. Then again, some of them don't know any other way to package and deploy software except in containers.

> I have interviewed "senior devops" candidates that didn't know what procfs was.

We've all had our fair share of encountering dishonest interviewees/resumes.

I know what it is, do I qualify for at least a junior position? :D

Hopefully they didn't get the green light..