Prebuilt DEB packages are available for downloading from the Mysterium node repository release page: https://github.com/mysteriumnetwork/node/releases
1) Download myst_linux_amd46.deb or any other available package (depending on your OS);
2) Install the downloaded package:
sudo dpkg -i myst_linux_amd64.deb
sudo apt-get -f install
After the installation, the mysterium-node service be running automatically.
You can use a sudo systemctl status mysterium-node command to make sure a service is running correctly.
If you want to change configuration parameters of the running service you can change a /etc/default/mysterium-node file and restart a service:
sudo systemctl daemon-reload
sudo systemctl restart mysterium-node