Since you may be interested I would add that it didn't take much preparation after having worked as a sysadmin/dev/linux user for nearly 10 years, and my employ

Since you may be interested I would add that it didn't take much preparation after having worked as a sysadmin/dev/linux user for nearly 10 years, and my employer paid for it so there wasn't really investment from me. There are some targeted questions (there was a Docker question for example) that might throw you if you don't typically use the tech, but also a lot of general linux usage (grep, find, stdin/out/err manipulation, etc) so that even if you have to skip something (I didn't finish completely) you still stand a good chance of passing. I did find it to be a good exercise in some things that I don't do often (and things like using man pages), and I also would say that I feel a bit more confident and validated walking around with the cert than I did before. I also got a T-Shirt!