This guide will help you install the LavaLink server on an Ubuntu system. LavaLink is a Java application, so you'll need to have Java installed on your system.

1. Save the script to a file, for example install_lavalink.sh.

2. Make the script executable:

   chmod +x install_lavalink.sh
   

3. Run the script with sudo:

   sudo ./install_lavalink.sh
   

This script will update your system, install Java, download the LavaLink JAR file, create the necessary configuration files, set up the systemd service, and start the LavaLink server. Make sure to replace "dfanso" in the configuration file with a secure password of your choice.

First, update your system to ensure you have the most recent packages:

sudo apt update
sudo apt upgrade -y

LavaLink requires Java. Install it with:

sudo apt install openjdk-11-jre-headless -y

Verify the installation with:

java -version

Download the latest LavaLink.jar file from the LavaLink GitHub repository:

wget https://github.com/Cog-Creators/Lavalink-Jars/releases/download/3.7.11%2Bred.3/Lavalink.jar

LavaLink requires a configuration file named application.yml. Create this file in the same directory as your LavaLink.jar file:

nano application.yml

Copy the following configuration into application.yml:

server:
  port: 8080
  address: 0.0.0.0
lavalink:
  server:
    password: "your_password_here"
    sources:
      youtube: true
      bandcamp: true
      soundcloud: true
      twitch: true
      vimeo: true
      http: true
    bufferDurationMs: 4000
    youtubePlaylistLoadLimit: 6
    playerUpdateInterval: 5
    youtubeSearchEnabled: true
    soundcloudSearchEnabled: true
metrics:
  prometheus:
    enabled: false
    endpoint: /metrics
  influx:
    enabled: false
    dbName: lavalink
    hostname: localhost
    port: 8086
    username: admin
    password: password

Replace "your_password_here" with a secure password of your choice.

Run LavaLink with:

java -jar Lavalink.jar

To run it in the background, use screen:

screen -S LavaLink
java -jar Lavalink.jar

Detach from the screen session with CTRL+A then D. Re-attach with screen -r LavaLink.

To keep LavaLink running continuously, use systemd.

Create a service file for LavaLink:

sudo nano /etc/systemd/system/lavalink.service

Add the following configuration:

[Unit]
Description=LavaLink
After=network.target

[Service]
User=your_username
WorkingDirectory=/path/to/your/lavalink/directory
ExecStart=/usr/bin/java -jar Lavalink.jar
SuccessExitStatus=143
TimeoutStopSec=10
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target

Replace your_username with your actual username and /path/to/your/lavalink/directory with the path to your LavaLink directory.

Enable and start the service:

sudo systemctl enable lavalink.service
sudo systemctl start lavalink.service

Check the status of the service:

sudo systemctl status lavalink.service

If you encounter issues, ensure the path and permissions are correct. The user specified should have access to the LavaLink directory. If your Lavalink.jar is in the root directory, adjust the service file accordingly:

[Unit]
Description=LavaLink
After=network.target

[Service]
User=root
WorkingDirectory=/root
ExecStart=/usr/bin/java -jar /root/Lavalink.jar
SuccessExitStatus=143
TimeoutStopSec=10
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target

Reload the systemd daemon and restart the service after any changes:

sudo systemctl daemon-reload
sudo systemctl restart lavalink.service

1. Check Logs:

   journalctl -u lavalink.service

2. Check Service Status:

   sudo systemctl status lavalink.service

3. Check Open Ports:

   sudo netstat -tuln | grep 8080

   If netstat is not installed, install it with:

   sudo apt install net-tools

4. Connect a Bot: Ensure your bot can connect to the LavaLink server and play tracks without issues.

By following these steps, you should have a running LavaLink server on your Ubuntu system.