grep "hello" file.txt Multiple File Grep Search For example, to find the word hello in a file named file.txt we would run the following command. To find a word inside of a single file we specify the word we want matched and file to search. It is used to search a single file or an entire directory, including child directories, for a matching string. The grep command in Linux is a utility used to search any given input files for one or more matching words or patterns. In this tutorial, you will learn how to use the grep command in Linux, Unix and OSX, with examples of common use cases.
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