Adding the Debian/Ubuntu UVolante repo to your system

Supported distributions

Debian Ubuntu LTS
bullseye focal
buster bionic
stretch xenial
jessie trusty
wheezy
squeeze
lenny

Download the repository public key

wget -O - https://www.uvolante.org/apt/uvolante.pub.key | sudo apt-key add -

Download the appropriate source.list file

sudo wget -O /etc/apt/sources.list.d/uvolante.list https://www.uvolante.org/apt/uvolante.`lsb_release -c | awk '/^Codename:/{print $NF}'`.list

Update!

sudo apt-get update