5 grep like commands

[ Thanks to linuxaria for this link. ]

"Everyone knows (and loves) grep, I've also wrote an article on it, but today we'll see other small utility that have some things in common with it.

"In particular I'll show you: pgrep, grepcidr, ngrep, pdfgrep and taggrepper.

"All are command line tools to be used with your favorite shell, I'll show you some example for every command.

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