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12 useful examples of Linux grep command

In this article, we are going to provide you with useful examples of Linux grep command including the two variant programs: egrep and fgrep. grep (global regular expression print) is used to search for text strings and regular expressions line by line which match a specified pattern within one or more files.

Listed below are some simple and useful examples of how to use the grep command on Linux and search for a string in one/multiple files.