Grep regex one of two strings how to#

First, let’s start by explaining what grep is. With multiple grep files, it is possible to run the same command on several files at once. It searches for strings and words within files and returns a list of lines that contain the words or strings in question. If you have been looking for a way to search for multiple strings or words in a text file, grep is an excellent tool to use. The “-c” parameter allows you to count the number of times a search string occurs. For example, if you’re looking for grep multiple strings in Linux, you’ll want to include the “.log” extension. Using the file extension will search for the file name, but will also count the number of files with the same extension. You can search all files in a directory or use file extensions to narrow down your search.

Using grep to search for multiple strings is extremely useful when working with large data files. The output will include the name of the file, as well as a line that matches your pattern. Once you have the filename, use a colon to separate the lines and then type the desired pattern.

Grep regex one of two strings how to#

The example below shows how to run grep to find strings in a document. You can use grep to search for more than one word or in groups of files. Grep searches for multiple strings, based on their length and pattern. Before learning how to Grep multiple strings in Unix, it’s important to understand how to use a grep command.