Astrill Setup Manual:How to setup WireGuard on Linux
Open Terminal on your Linux OS and run following command to install WireGuard: sudo apt install wireguard
Login your Astrill account on Astrill website: https://www.astrill.com/member-zone/log-in
After login, go to "VPN Services" tab and then go to "WireGuard configurations".
Now generate WireGuard configuration file for your desired server and download it.