Configure Aria2 Seed Ratio Limit for Torrents Ubuntu

This guide explains how to configure the aria2 download utility on Ubuntu to stop seeding torrents once a specific ratio is reached. You will learn how to set the seed ratio limit using command-line arguments or the configuration file to manage bandwidth usage effectively.

Install Aria2 on Ubuntu

Before configuring settings, ensure aria2 is installed on your system. Open your terminal and run the following commands to update your package list and install the software:

sudo apt update
sudo apt install aria2

Set Seed Ratio via Command Line

You can define the seed ratio for a specific session directly when starting the download. The --seed-ratio option determines when seeding stops based on the upload-to-download ratio. For example, to stop seeding after uploading an amount equal to the download size (1.0 ratio), use:

aria2c --seed-ratio=1.0 file.torrent

Setting the value to 0.0 disables seeding entirely after the download completes.

Set Seed Ratio in Configuration File

For a permanent setting across all torrent sessions, modify the aria2 configuration file. Open the file located at ~/.aria2/aria2.conf using a text editor:

nano ~/.aria2/aria2.conf

Add or modify the following line to set your desired ratio:

seed-ratio=1.0

Save the file and exit. Any new torrent tasks started by aria2 will now adhere to this limit automatically.

Verify the Settings

To confirm that the ratio limit is active, check the aria2 console output during a torrent session. Once the upload ratio meets your specified limit, aria2 will stop seeding and terminate the task. You can also view active settings by running aria2c with the --help flag and searching for seed-ratio options.