The grep command is a handy, reliable tool for searching for files or information. This tutorial illustrates 10 ways to take advantage of its power and flexibility.

The grep command – likely one of the first ten commands that every Unix user comes to know and love – is not just a nice tool for finding a word or phrase in a file or command output.

Grep and diff are command line-based text analysis tools available in all Linux and Unix distributions. Both are designed to parse documents on a line-by-line basis.

Taking grep to the next level with regular expressions The real power of the grep command can be unlocked by using regular expression (regex) syntax, a simple language for describing the ...

Incidentally, you can do a lot of these command-line exercises almost as succinctly with perl one-liners, which is one reason why perl was so popular among Unix-heads back in the days.