Click for a PDF with this and four other essential Linux articles. And, if you’ve ever heard anyone say that for Unix, everything is a file, you might not be too surprised to learn that lsof works ...

You have probably used lsof from time to time, probably when tracking down some sort of problem. But maybe you haven’t tried all of its permutations or looked at it just to get a deeper understanding ...

Happy hangover Monday everyone! To soothe those post-big-game blues, here's this week's man page -- lsof, the LiSt Open Files tool. If you're trying to figure out why a removable drive won't unmount ...