Instructions on how to install Webmin on Centos 7.7
Step by Step
Login to your remote server over SSH with your root credentials. Ideally, you should use putty, which supports copy and paste.
Update yum packages:
yum -y update
Install Webmin dependencies:
yum -y install perl perl-Net-SSLeay openssl perl-IO-Tty
Get the latest RPM installation package for Webmin. Find the latest release build number at https://sourceforge.net/projects/webadmin/files/webmin/
wget http://prdownloads.sourceforge.net/webadmin/webmin-1.930-1.noarch.rpm
Then install Webmin from the RPM package:
rpm -U webmin-1.930-1.noarch.rpm
Once done, go to your server IP on port 10000 using web browser:
https://SERVER-IP-ADDRESS:10000