![]() ![]() You can use it by adding “-r” before the desired pattern to search. The next option we will analyze is the recursive function. The system will now display all processes that match the particular username except the grep one. Here is the line that you should use: ps -ef | grep username | grep -v grep For example let’s say that you want to display all results, but you want to exclude the particular grep process to be shown. You can further customize the results by utilizing the invert match function. The above line first told a Linux-based OS to look for system processes, but Grep specified to look only for processes run as a particular “username” account. Here is an example: ps -ef | grep username The idea is simple – you start by issuing the other command and then follow it with the conditions of the Grep search. The system will now display all lines in the “folder/file.txt” file that do not contain the string “Mark Stevenson.” Search a Command Output with GrepĪn extremely useful option that the Grep command offers is to look for a pattern in the result of another command. The “-v” function is nothing else than the command to execute an inverted search. Here is how that looks: grep -v "Mark Stevenson" /folder/file.txt Instead of looking whether a file contains lines with a particular pattern, you will ask the system to display all lines that do not match that string. You can also turn the search upside down. If you only want to find a file or a folder you can use the find command. Quotation marks are a must whenever you are searching for text (or string) with spaces. If you want to look for multiple words that include spaces, your strings need to look like this: grep "Mark Stevenson" /folder/file.txt The system will now look for any lines containing “Mark” in the “folder/file.txt.” It will display one line at a time in the output. Now, let’s take a look at how we can use the above syntax to search for a specified text in a particular file. Here is how the syntax of the Grep command should look: grep pattern If you are interested in learning how this command works and how to find Grep exact match, take a look at this tutorial. You can use Grep to search multiple files for lines that will provide a match to the set pattern. The global regular expression print command or GREP is among the ones Linux users frequently utilize. The Linux terminal is a quite powerful utility with numerous useful commands to control your operating system. ![]()
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