This guide demonstrates how to build and install a complete NIS (Network Information Service) server on Rocky Linux 9, where the official repositories no longer provide ypserv packages. We build ypserv 4.2 from source code.
ypbind-mt (NIS client) is available in EPEL9
Regular expression (Regex) also known as rational expression is a technique formalized by the American mathematician Stephen Cole Klene in 1950. It consists in a conjunction of special characters meant to search and match specific string patterns.
This tutorial will describe basic components you need to know to compose a regex that can be use to find text patterns like phone numbers, emails, html tags, urls, hex values among others.
The following regex is an example of expression that will match an American phone number pattern like (555) 555-5555.