protonvpn-cli is the official Linux command line tool for connecting to the ProtonVPN. It is a full rewrite of the original bash protonvpn-cli in Python, which adds more features and functionality with the purpose of improving readability, speed, and reliability. Before using protonvpn-cli, it must be initialized. Run (as root) protonvpn init and follow the prompts on the screen. Your OpenVPN username and password can be found at https://account.protonvpn.com/account. Note that both free and paid accounts are supported. After protonvpn-cli is configured, run (as root) protonvpn connect -f to connect to ProtonVPN using the fastest available server. Before uninstalling, run protonvpn configure to purge the configuration files. All dependencies must be built with Python3 support.