Coming at that from the other side, I've been running Linux somewhere between 15 and 20 years, certainly far enough back that there was nothing like a newby distro when I began. I have a small server cluster in my home, 2 subnets, etc. I've debugged some ugly problems at home and at work, where I'm one of the local experts. (as opposed to real experts, which I'll admit that I'm not.) Given the level of deprecation generally heaped on Certifications here and other sites in the culture, I've wondered how hard it would be to go get a Certification cold. Does a decent background in theory and text file / command line configuration form a good basis, or are the Certifications all about driving dialog panels?
I heard recently that someone I know just got "Network+ Certified", whatever that means, and found that it improved his job hunt. Last I knew it hadn't resulted in a job, but at least he's getting more live interviews. That news prompted me to wonder how hard these things really were. That's not to denigrate him, just wondering if some practical basis plus a silly certification might make a good showing.