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.
Now open Terminal again and run following command to activate WireGuard: wg-quick up Downloads/wg0.conf
In that above command "Downloads" is the location where you downloaded WireGuard .conf file and "wg0.conf" is the name of downloaded file.
After activating WireGuard open following link in browser to check if WireGuard is connected or not: https://www.astrill.com/what-is-my-ip
If you see your IP changed, you're good to go.
NOTE: To disconnect/deactivate WireGuard run following command in terminal: wg-quick down Downloads/wg0.conf