How to install whois command on Linux server with yum?
This is what i did to install it successfully.

# whois 1.2.3.4
-bash: whois: command not found

# yum install whois
No package whois available.

# yum whatprovides */whois
jwhois-4.0-19.el6.x86_64 : Internet whois/nicname client
Repo : base
Matched from:
Filename : /usr/bin/whois

# yum install jwhois
Complete!

# whois 1.2.3.4
WORKS NOW..