The grep utility is a powerful tool and can use regular expressions. Regular expressions can be considered ‘logic rules’ for matching text strings. Think of something like “I know the word should be starting with the letter ‘a’, but after that everything is fine”. Ack is a grep-like source code search tool. The latest version of ack is v3.5.0, released 2021-03-12. Designed for programmers with large heterogeneous trees of source code, ack is written in portable Perl 5 and takes advantage of the power of Perl's regular expressions.

GrepWin - Stefans Tools

The grep command in Linux is widely used for parsing files and searching for useful data in the outputs of different commands.

The findstr command is a Windows grep equivalent in a Windows command-line prompt (CMD).

Windows Grep has support for search-and-replace text. This is very helpful if you want to edit files en-masse. The Linux grep command is a string and pattern matching utility that displays matching lines from multiple files. It also works with piped output from other commands. We show you how. The Story Behind grep. Grep, which stands for 'global regular expression print,' is a powerful tool for matching a regular expression against text in a file, multiple files, or a stream of input. It searches for the PATTERN of text you specified on the command line, and outputs the results for you.

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In a Windows PowerShell the alternative for grep is the Select-String command.

Below you will find some examples of how to “grep” in Windows using these alternatives.

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Grep Command in Windows

Grep the output of a netstat command for a specific port:

If a command in PowerShell returns some objects, before parsing, they should be converted to strings using the Out-String -Stream command:

Grep a file for a pattern that matches a regular expression (case insensitive):

Grep Tools

Display help for the Windows grep command equivalents: