For example, if you want to exclude all lines that contain a number followed by the word “error”, you can use the following command: grep -v '*error' file.txt Use regular expressions: Regular expressions, or regex, are a powerful way to specify complex patterns to search for or exclude. This will show you all lines in file.txt that do not contain any of the words in exclude.txt. For example, if you have a file called exclude.txt containing a list of words to exclude, you can use the following command: grep -v -f exclude.txt file.txt This can be useful if you have a large number of patterns to exclude or if you want to use the same set of patterns in multiple searches. Use the -f option: The -f option allows you to specify a file containing a list of patterns to search for or exclude. This will show you all lines in file.txt that do not contain either the word “error” or the word “warning”. For example, if you want to exclude the words “error” and “warning” from your search, you can use the following command: grep -v -e error -e warning file.txt Use the -e option: The -e option allows you to specify multiple patterns to search for, and the -v option can be used in conjunction with it to invert the search for all patterns. This will show you all lines in file.txt that do not contain the word “error”. For example, if you want to exclude the word “error” from your search, you can use the following command: grep -v error file.txt Use the -v option: The -v option inverts the search, meaning it will show you all lines that do NOT match the pattern you are searching for. Here are a few ways you can exclude words and patterns in grep: This can be useful if you want to focus on specific patterns or if you want to exclude certain types of information from the search results. One useful feature of grep is the ability to exclude certain words or patterns from the search. It is widely used by programmers, system administrators, and analysts to search for specific patterns in logs, configuration files, and other types of data. We hope you’ve learned enough to understand each method we’ve covered above.Grep is a powerful command-line tool that allows you to search for specific patterns or words in a file or group of files. In the above tutorial, we’ve learned how to find multiple words in a file using the grep command in Linux. Grep -iE "hitesh.*rajesh|rajesh.*hitesh" test.txt If you want to search all the lines that contain both “hitesh” and “rajesh” in test.txt file(in any order), run the following command: If you want to search all the lines that contain both “hitesh” and “mahesh” in test.txt file(in the same order), run the following command: Grep -e "hitesh" -e "rajesh" -e "vijay" test.txt You can use multiple -e option in a single command to use multiple patterns: If you use -E option with grep command, you just need to use | to separate multiple patterns: You can use option -i to ignore the case as shown below: You can use option -w with grep command to search for an exact word: Let’s search for pattern hitesh and rajesh in a test.txt file: In this section, we will show you how to search multiple words in a file with hands-on examples. Grep -e "word1" -e "word2" FILE Create a Sample Fileįor the purpose of this tutorial, create a sample test.txt file with the following contents: The basic syntax to search multiple words in a file is shown below: In this tutorial, We will show you how to Search Multiple Words (or Strings/Patterns) in a File using Grep along with several examples! Basic Syntax There are several ways to search multiple words in a file with grep command, and that’s what we’ll be going over today! It is used to search for a string in a file and display all the lines that contain that string. Grep is one of the most powerful command-line utility in Linux.
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