How to install whois on RHEL 8

Procedure to install whois as follows on a CentOS/RHEL (Red Hat Enterprise Linux) version 8:

  1. Open the terminal app on CentOS 8. For remote RHEL 8 server login using ssh user@server-ip-here command
  2. Enable EPEL repo on CentOS 8 (see how to enable EPEL repo on RHEL 8). :
  3. Install whois client, execute: sudo yum install whois
  4. Test it: whois public-ipv4-here OR whois cyberciti.biz

Let us see all examples and commands in details.

Install whois on a CentOS 8 Linux box

Install whois on CentOS 8 Linux by enabling EPEL repo

Turn on EPEL repo on CentOS 8, run the following yum commands:
sudo yum install epel-release
sudo yum config-manager --set-enabled PowerTools
sudo yum repolist


Search for the package:
sudo yum search whois
Sample outputs:

Last metadata expiration check: 0:27:16 ago on Tuesday 01 October 2019 06:38:00 PM UTC. ======================== Summary & Name Matched: whois ========================= whois.x86_64 : Improved WHOIS client whois-nls.noarch : Gettext catalogs for whois tools

Find info about the whois package on CentOS 8 box:
sudo yum info whois
Sample outputs:

Last metadata expiration check: 1:33:27 ago on Tuesday 01 October 2019 05:36:22 PM UTC. Available Packages Name : whois Version : 5.5.1 Release : 1.el8 Arch : x86_64 Size : 77 k Source : whois-5.5.1-1.el8.src.rpm Repo : epel Summary : Improved WHOIS client URL : http://www.linux.it/~md/software/ License : GPLv2+ Description : Searches for an object in a RFC 3912 database. : : This version of the WHOIS client tries to guess the right server : to ask for the specified object. If no guess can be made it will : connect to whois.networksolutions.com for NIC handles or : whois.arin.net for IPv4 addresses and network names.

Let us install whois client:
sudo yum install whois
Sample outputs:

Last metadata expiration check: 1:34:15 ago on Tuesday 01 October 2019 05:36:22 PM UTC. Dependencies resolved. ================================================================================ Package Arch Version Repository Size ================================================================================ Installing: whois x86_64 5.5.1-1.el8 epel 77 k Installing dependencies: whois-nls noarch 5.5.1-1.el8 epel 37 k   Transaction Summary ================================================================================ Install 2 Packages   Total download size: 114 k Installed size: 343 k Is this ok [y/N]: y Downloading Packages: (1/2): whois-nls-5.5.1-1.el8.noarch.rpm 362 kB/s | 37 kB 00:00 (2/2): whois-5.5.1-1.el8.x86_64.rpm 744 kB/s | 77 kB 00:00 ——————————————————————————– Total 65 kB/s | 114 kB 00:01 Running transaction check Transaction check succeeded. Running transaction test Transaction test succeeded. Running transaction Preparing : 1/1 Installing : whois-nls-5.5.1-1.el8.noarch 1/2 Installing : whois-5.5.1-1.el8.x86_64 2/2 Running scriptlet: whois-5.5.1-1.el8.x86_64 2/2 Verifying : whois-5.5.1-1.el8.x86_64 1/2 Verifying : whois-nls-5.5.1-1.el8.noarch 2/2   Installed: whois-5.5.1-1.el8.x86_64 whois-nls-5.5.1-1.el8.noarch   Complete!

Installing whois on an RHEL 8 Linux server

RHEL 8 install whois client by enabling EPEL repo
whois command not found on RHEL 8

First enable on EPEL repo on RHEL 8, execute the following commands:
$ sudo yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
$ sudo subscription-manager repos --enable "codeready-builder-for-rhel-8-*-rpms"
$ sudo yum repolist


Install it:
sudo yum search whois
sudo yum install whois

How do I use whois client?

whois is a useful command for Linux and Unix users if you want to find out the following info:

  • Find out the names of the DNS servers for a domain
  • Obtain the name of the administrative contact for a domain including the name of a company or organization whose domain name you know
  • Contact IP or domain owner to report abuse or misconfiguration issues and more.
RHEL or CentOS 8 install whois and use it to query IP address

The syntax is:
whois IP-address
whois domain-name
whois [options] objects
whois cyberciti.biz
whois 69.164.200.202

source : https://www.cyberciti.biz/faq/how-to-install-whois-on-rhel-8-centos-8/

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