![]() ![]() You can display only filenames that contain a specific string using -l option.įor example, list all filenames in the current directory that matches the string tecadmin, run the following command: grep -l tecadmin * To List Filenames That Matches Specific Pattern This command will exclude all the lines that contain the string linux: You can use grep command with -v option to print all lines that do not match a specific pattern of characters.įor example, print all lines that don’t contain the string linux in file1.txt and file2.txt, run the following command: grep -v linux file1.txt file2.txt This command will print all lines that contain a word linux in all files in the current directory and sub-directories:įile3.txt:Ubuntu is a linux operating system ![]() To search for a string linux in all files in the current directory and sub-directories, run the following command: grep -r linux *.This command will print all lines that contain a word linux in file1.txt and file2.txt:įile1.txt:tecadmin is a popular linux blogįile2.txt:Linux is an open-source operating system.įile2.txt:linux is made by linus torvalds.įile2.txt:linux is most popular operating system. To search for a string linux in file file1.txt and file2.txt, run the following command: grep -i linux file1.txt file2.txt.To Search a Specific String in Multiple File This command will print all lines that contain a word tecadmin case insensitively: To search for a string tecadmin case insensitively in the file file1.txt, run the following command: grep -i tecadmin file1.txt.This command will print all lines that contain a whole word tecadmin: To search for an exact string tecadmin in the file file1.txt, run the following command: grep -w tecadmin file1.txt.This command will print all lines that contain a word tecadmin: To search for a string tecadmin in the file file1.txt, run the following command: grep tecadmin file1.txt.A system running the Linux operating system.In this tutorial, we will show you how to use the Grep command with some practical examples. Suggested Read: 12 Awesome Linux Find Command Examples.So Grep command can be used to search some kind of text, word, pattern or sentence in a text file or a number of text files. Basically, Grep searches a text file for the specified regular expression and outputs any line containing a match to standard output. Grep is a powerful tool for searching a text, Grep means “Global regular expression print”. ![]()
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