Anyone interested in a free, self-paced course to Linux might be interested in this. It is by the Linux Foundation, so I expect this to be pretty high quality. I'll be doing the course myself to see how it is and hopefully learn new stuff. The course can be accessed on the edX website
My boss has told me several times that "if I wanted to get certified work will pay for it" So I'm definitely going to take this course!
I always get this funny feeling that every time Linus Torvalds is making some sort of introduction there's this feeling that he's gonna start yelling and telling everyone to eff off, etc etc. Still, it would be nice to get the certificate :]
Considering I have no certifications what-so-ever, it would definitely be nice. Specially since I work in IT and have a few Unix/Linux servers.