https://doxfer.webmin.com/Webmin/Installation#apt-get_.28Debian.2FUbuntu.2FMint.29
apt-get (Debian/Ubuntu/Mint)
You can add the Webmin repository (webmin-repo) and use Jamie Cameron's key to install and maintain the latest version of Webmin/Usermin. The commands below add the Webmin repository to your system and install the latest version of Webmin and all necessary packages.
Just input or copy and paste the text below and hit Enter/Return:
sudo sh -c 'echo "deb http://download.webmin.com/download/repository sarge contrib" > /etc/apt/sources.list.d/webmin.list' wget -qO - http://www.webmin.com/jcameron-key.asc | sudo apt-key add - sudo apt-get update sudo apt-get install webmin
