When working on a Linux system, finding text in files is a very common task done by system administrators every day. You may want to search for specific lines in a log file in order to troubleshoot servers issues. In some cases, you are interested in finding actions done by specific users or you want to restrict lines of a big file to a couple of lines. Luckily for you, there are multiple ways of finding text into files on Linux but the most popular command is the grep command.