[kylek]

In my experience the only certs worth their salt in the linux space are the Redhat certs (RHCSA/RHCE). They cover a very broad range of subjects. The go-to study resource for these is a book by Michael Jang.

CCNA if you plan on doing anything with networking. I took a training course in highschool (many years ago!) but never took the test and it's been pretty invaluable. Yah there's a lot of vendor-specific stuff in it, but there is also a lot of theory that's applicable across the board. It's very hard to get any experience with that type of gear prior to your first real job.