VPS Setup - SunDevs Help Center

Prerequisites

Java 21+ installed
A valid SunBot license key. See Get your license key.

1. Upload required files

Transfer the following files to your VPS:

server.jar (SunBot server file)
license.txt (contains your license key)

You can use scp or an FTP client like FileZilla. Example using scp:

scp server.jar license.txt user@your-vps-ip:/home/user/

2. Start the SunBot server

Navigate to the directory containing server.jar and license.txt, then run:

SERVER_PORT=25595 java -Dterminal.jline=false -Dterminal.ansi=true -jar server.jar

Replace 25595 with the desired port number.
Make sure the port is open in your firewall settings.

If Java 21+ is not installed, you can install it with:

sudo apt update
sudo apt install openjdk-21-jdk -y

3. Verify local access

Once the server starts, check it from the VPS itself:

curl http://localhost:25595

4. Expose to the internet (optional)

To access SunBot from an external network, configure a reverse proxy with Nginx. Install Nginx

sudo apt install nginx -y

Configure the Nginx proxy

sudo nano /etc/nginx/sites-available/sunbot

Add the following content:

server {
    listen 80;
    server_name yourdomain.com;

    location / {
        proxy_pass http://localhost:25595;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}

Save and exit (CTRL + X, then Y, then Enter). Enable the configuration and restart Nginx

sudo ln -s /etc/nginx/sites-available/sunbot /etc/nginx/sites-enabled/
sudo systemctl restart nginx

SunBot is now available at http://yourdomain.com.

5. Run on port 80 (alternative)

If you don’t want to use Nginx, run SunBot directly on port 80:

SERVER_PORT=80 java -Dterminal.jline=false -Dterminal.ansi=true -jar server.jar

This works only if no other services (like Nginx or Apache) are using port 80.

6. Configure the firewall (if required)

sudo ufw allow 80/tcp
sudo ufw allow 25595/tcp
sudo ufw reload

7. Keep SunBot running

To keep SunBot running after you close the terminal, use screen or tmux:

screen
tmux

sudo apt install screen -y
screen -S sunbot
SERVER_PORT=25595 java -Dterminal.jline=false -Dterminal.ansi=true -jar server.jar

Press CTRL + A, then D to detach. To resume:

screen -r sunbot

sudo apt install tmux -y
tmux new -s sunbot
SERVER_PORT=25595 java -Dterminal.jline=false -Dterminal.ansi=true -jar server.jar

Detach with CTRL + B, then D. Resume with:

tmux attach -t sunbot

Conclusion

SunBot is now set up on your VPS. You can manage it manually or configure a systemd service for automatic startup. If you’d prefer a managed setup, consider SunBot Managed Hosting.