The grep command supports perl-flavored regular expression pattern matching. Rather than grepping for specific words, you can use regex with grep to find patterns throughout a text or command output.

Grep is a small UNIX program for finding matching patterns. First released in V6 UNIX, you can now find it on almost any UNIX-like system such as Linux, macOS, and even BSDs. In this article, I will ...

While the tools in @sec-files-pipes can filter and transform data, they work on whole lines or fixed positions. **Pattern matching** lets you search based on the *content* of text—finding lines that ...