How to Configure aria2 to Use Specific Trackers on Ubuntu

This guide explains how to set up aria2 on Ubuntu to utilize specific trackers for torrent downloads. You will learn how to edit the configuration file or use command-line arguments to ensure your downloads connect to the right peers efficiently. By following these steps, you can optimize download speeds and manage tracker lists effectively within the Linux environment.

Install aria2

Before configuring trackers, ensure aria2 is installed on your Ubuntu system. Open your terminal and run the following command to install the package from the default repositories:

sudo apt update
sudo apt install aria2

Using Command-Line Arguments

For one-time downloads, you can specify trackers directly when executing the download command. Use the --bt-tracker option followed by the tracker URL. You can add multiple trackers by separating them with commas.

aria2c --bt-tracker="http://tracker.example.com:80/announce,udp://tracker.openbittorrent.com:80" "magnet:?xt=urn:btih:HASH"

This method overrides any default settings for that specific session only.

Configuring the Permanent Settings

To always use specific trackers without typing them every time, edit the aria2 configuration file. If the file does not exist, create it in your home directory.

mkdir -p ~/.aria2
nano ~/.aria2/aria2.conf

Add or modify the following line in the configuration file to include your preferred trackers:

bt-tracker=http://tracker.example.com:80/announce,udp://tracker.openbittorrent.com:80

Save the file and exit the editor. Any subsequent torrent downloads initiated by aria2 will now automatically include these trackers.

Verifying the Configuration

To confirm that aria2 is using the specified trackers, you can start a download with the verbose flag enabled. This will display the connection details in the terminal.

aria2c -V "magnet:?xt=urn:btih:HASH"

Look for the tracker URLs in the output log to ensure they match the ones you configured.

Updating Tracker Lists

Trackers can go offline frequently. To maintain download speeds, periodically update the tracker list in your configuration file or command line with active URLs. You can find public tracker lists online that are regularly maintained by the community. Replace the existing URLs in your aria2.conf file or command arguments with the new list to ensure consistent connectivity.