5/16/2023 0 Comments Grep multiple![]() ![]() The default is 2 and is equivalent to -A 2 -B 2. grep -C num Print num lines of leading and trailing context surrounding each match. grep -B num Print num lines of leading context before each match. When you run this command, you'll get back a list of every line in the document containing the word bee or the word Vanessa. grep -A num Print num lines of trailing context after each match. For that, you need to follow the syntax mentioned below grep ‘it\you’ testfile.txt In the same way, if you want to find more than two strings in a file, then we can do that as well using the syntax: grep ‘it\you\and’ testfile. The syntax looks like this: grep -E 'bee|Vanessa' ~ /work/beescript.txt Another way of searching multiple patterns, We can give multiple patterns with pipe separated when we use -E as an argument. The grep command can be used to find multiple strings that you have provided it to. If you want to display all the NFS-mounted filesystems that point to a specific. Let's say, for example, you wanted to find every occurrence of the words bee and Vanessa in a text document containing the script from the 2007 Bee movie. You can also search with multiple grep commands on the output of a command. This syntax, using the ~ and /, followed by the location of the file in the home folder, is what you'll use to show the grep command which files to search. ![]() For example, if you wanted to enter the path for a text document located in a folder called work inside the home folder, you'd reference it using this format: ~ /work/textdocument.txt You'll also need to be familiar with how to reference files by path using the terminal. First, you'll need to be able to bring up a terminal-on most systems, you do this with the key combination Ctrl Alt T, or via the applications menu. Searching Multiple Strings in grepīefore getting started, you'll need to make sure you are familiar with a few Linux basics. So, we add the “cd Desktop/” command and the command that we assign to it for the grep of searching out our two strings of “bat” and “ball” which are present in the data of our file.This article focuses on how to search multiple strings using grep and will show you a few similar tips and tricks for using grep in general. Then, we add the command of granting access to the desktop since the “file.txt” directory is a desktop. We store the data in this text file on the desktop as provided in the following:Īfter the creation and addition of data in the file, we move into the terminal of the Linux. To utilize this method in the Linux operating system, we create a text file first on the desktop with the “file.txt” name and then save the statement data in the file to search the string in it. Utilization of “Grep” in Multiple Strings and Patterns To ignore the cases while doing search operations, the users can use the “-i” option when launching the grep program. Before the pipe “|”, we can add a backslash to create the regular expressions. ![]() The pipe symbol can be used to divide them. The strings and real path of the relevant file are typically included in the grep command. The grep method of multiple strings or patterns can be used if the operating system contains files with multiple strings and the user wants to target or reach the specified two or more strings from the file. txt Or put patterns on several lines: grep - 'foo bar'. If grep is made to match several strings, all of the matches will be. You can do this by preceding each pattern with the -e option. Syntax grep options Search String filename grep options -e PATTERN FILE. The users of the Linux operating system can use grep to investigate the various patterns or strings in a file. txt Another possibility when you're just looking for any of several patterns (as opposed to building a complex pattern using disjunction) is to pass multiple patterns to grep. ![]()
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