Webmin is a powerful web based control panel for linux servers, to install on Ubuntu 18.04 and variants:

$ sudo apt install wget

$ wget -qO- http://www.webmin.com/jcameron-key.asc | sudo apt-key add
$ sudo add-apt-repository "deb http://download.webmin.com/download/repository sarge contrib"
$ sudo apt update

$ sudo apt -y install webmin