install protonvpn ubuntu
sudo apt-get update sudo apt-get install protonvpn
Source: protonvpn.com
protonvpn install ubuntu debian
sudo apt-get install {/path/to/}protonvpn-stable-release_1.0.1-1_all.deb
Source: protonvpn.com
sudo apt-get update sudo apt-get install protonvpn
sudo apt-get install {/path/to/}protonvpn-stable-release_1.0.1-1_all.deb