Last week Lincoln introduced us to the Command Line; that mysterious place where hackers of the more nefarious kind are usually depicted tearing down the protective walls of the intertubes. As I hope ...

In Linux, the uniq command can help find out the individual users who are logged into a given server, but it’s not a straightforward process. Yes, using the command on its own yields a list of who’s ...

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 ...

One of the truly great qualities of UNIX-like operating systems is their ability to combine multiple commands. By combining commands, you can perform a wide array of tasks, limited only by your ...