John D. Cook points to three new Linux cheat sheets from Peteris Krumins:
While investigating, I ran across:
Set Operations in the Unix Shell Simplified
From that post:
Remember my article on Set Operations in the Unix Shell? I implemented 14 various set operations by using common Unix utilities such as diff, comm, head, tail, grep, wc and others. I decided to create a simpler version of that post that just lists the operations. I also created a .txt cheat-sheet version of it and to make things more interesting I added an Awk implementation of each set op. If you want a detailed explanations of each operation, go to the original article.