You can direct grep to search through one file or many. You can also pipe in output from some other utility so that you’ll see only the information that you want to see. And, the fact that grep uses regular expressions allows you to perform searches even when you only have an approximate idea of what you’re searching for.

grep is a tool to search for strings inside a file. This release fixes an unexpectedly large number of flaws, from outright bugs (surprisingly many, considering this is "grep") to some occasionally debilitating performance problems. Special thanks to Paolo Bonzini for doing most of the heavy lifting.

Global Regular Expression Print is the rather un-catchy full name of grep, the staple of any Linux users toolkit. It is a search tool run from the command line that is evolved directly from Unix, and is so useful it deserved a post of its own.

"This is the second part of a three-part article on the famous sed one-liners. This part will explain sed one-liners for selective printing of certain lines. See part one for introduction of the series..."

This article covers two beneficial Linux tools, grep and sed. If searching for or handling text, grep and sed can increase your efficiency with Linux bash scripting and configuration files. We'll learn how to use these commands and get some helpful tips, too.