Install webmin on Centos 7 using Yum

Create and open this new file using your text editor:

sudo vi /etc/yum.repos.d/webmin.repo

Then add these lines to the file to define the new repository:

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

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

Save the file and exit the editor.

Next, add the Webmin author’s PGP key so that your system will trust the new repository:

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

Note: Before you install Webmin, make sure you have set a password for the root user by running 

sudo passwd

As you will need this to log in to Webmin later.

You can now install Webmin:

sudo yum install webmin

Once the installation finishes, you will see the following message in the output:

Webmin install complete. You can now login to https://your_domain:10000/
as root with your root password.