Checking Domain IP Addresses Using Linux Commands

This article introduces how to check and find IP addresses from domains using Linux commands.

When converting domain→IP from the console, it’s easy to use the getent command.

$ getent hosts unix.stackexchange.com
151.101.1.69    unix.stackexchange.com
151.101.129.69  unix.stackexchange.com
151.101.193.69  unix.stackexchange.com
151.101.65.69   unix.stackexchange.com

$ getent hosts unix.stackexchange.com | awk '{ print $1 }'
151.101.193.69
151.101.65.69
151.101.129.69
151.101.1.69

$ getent hosts unix.stackexchange.com | awk 'NR==1{print $1}'
151.101.193.69

By the way, when manually checking IP from a browser, the following site is convenient.

https://ipinfo.info/html/ip_checker.php

The method for outputting the first field of a line with awk referenced the following article.

https://stackoverflow.com/questions/22190902/cut-or-awk-command-to-print-first-field-of-first-row