Grep is one of the most use Linux command from command line. The grep command use to search text or searches the given file for lines containing a match to the given strings or words. Very useful if you want to search a text inside the files. And you can use regular expression in filtering the files.1. The basic use fo grep commands:2. Find a word in a file using grep command3. Recursive search in directories4. Ignore word case5. Search 2 different … Read more...