Webmin is a web-based interface for system administration. Using any modern web browser, you can setup user accounts, Apache, DNS, file sharing and much more.

Requirement:
CentOS 7 Dedicated Server

This guide explain how to install Webmin on CentOS 7.

Installation of Webmin

You need first to install the repo of Webmin

cd /etc/yum.repos.d/
nano webmin.repo

In this file you need to copy this text block

[Webmin]
name=Webmin Distribution Neutral
#baseurl=http://download.webmin.com/download/yum
mirrorlist=http://download.webmin.com/download/yum/mirrorlist
enabled=1

Import the GPG key

wget http://www.webmin.com/jcameron-key.asc
rpm --import jcameron-key.asc

Install Webmin with yum

yum install webmin -y

Access Webmin Control Panel

https://main_ip:10000
Use your root login and root password to log the interface.