I love chaining commands as much as anyone, and sed, awk, grep, and perl are some of my best friends. However, remember that, in *nix, each command runs in its own process, the resources required for ...

The first command we’ll examine in this post is a very unusual awk command that systematically removes every line in the file that is encountered more than once. It leaves the first instance of the ...

Even after decades of using Unix on thousands of systems, I find that it’s still fun to discover various convolutions of sed and awk commands to perform command line wizardry. There’s a lot more to ...