If it’s free, why not.

Will it help you get a job? I’ve never hired anyone based on a certification, because it doesn’t mean experience. Experience is what gets people hired.

Doctors don’t get hired without first doing a residency. Mechanics don’t get hired because they know all the parts on a car. And I won’t get hired by a law firm for simply scoring 99% on an LSAT.

The only people I have known with certs didn’t have educations. Generally, the fewer degrees, the more certs. There are exceptions.

If you have a PhD or Masters, then certifications are unlikely worth it.

If you don’t have a Bachelors, then certs are critical. Many jobs will just reject you.

A Bachelors is where certs seem to do the most good.

All of this in my part of the USA (Midwest and West) and speciality (HPC). I have been involved in hiring in several organizations.

Depends on your end goal, don’t pay for yourself. Tech is hard to break into, certificates can help elevate your resume when you do not have a network to leverage. It’s often good to “top off” your resume when market trends shift and you are lacking experience. For instance right now AWS certificates are likely strong additions if you don’t have any cloud background. My rhcsa helped get my first job and is a positive for legacy LAMP and java shops. Trending forward: you will primarily be using it to support Linux based docker containers and a lot of the networking and hardware configuration will be obfuscated away. There is a non-zero amount of file ownership and user groups; but existing organizations will have figured that out already.

My employer paid for a course heavily based on it (No cert, but condensed and more useful), and for my time. One tutor and two pupils over a week.

I found it moderately interesting, and slightly useful. It was the most relevant training available for administrating our (then) CentOS 5/6/7 servers. There were bits that didn’t transfer across to CentOS, mostly the proprietary RHEL software aspects which we largely skipped. There was much that was useful for any linux distro.

Highlight for me was properly learning awk during it - I still use that every day.