lookaheads

In the world of text processing in Linux, grep is a powerful utility that searches through text using patterns. While it traditionally uses basic and extended regular expressions, grep can also interpret Perl-compatible regular expressions (PCRE) using the -P option. This option allows us to leverage PCRE features like lookaheads, which are incredibly useful in complex pattern matching scenarios. This blog post will dive into how you can use grep -P for PCRE lookaheads in non-Perl scripts, followed by installation instructions for the utility on various Linux distributions.