How to install webmin on Ubuntu 18.04

webmin.sh

# System update

sudo apt update && sudo apt upgrade
sudo apt install software-properties-common apt-transport-https wget
wget -q http://www.webmin.com/jcameron-key.asc -O- | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] http://download.webmin.com/download/repository sarge contrib"

# Install webmin
sudo apt install webmin

# Adjust the Firewall
sudo ufw allow 10000/tcp

# Accessing Webmin Web Interface
https://your_server_ip_or_hostname:10000/

# Upgrading Webmin
sudo apt update && sudo apt upgrade