aria2 is a lightweight multi-protocol & multi-source download utility operated in command-line. It supports HTTP/HTTPS, FTP, BitTorrent and Metalink. aria2 has built-in JSON-RPC and XML-RPC interface. You can manipulate aria2 via these interfaces.

How to install the aria2 ?

In ubuntu system type the below command.

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$ sudo apt-get install aria2

Once the aria2 is installed, you can use this to download the files from the url.

Download the awk one liner script

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$ aria2c http://www.pement.org/awk/awk1line.txt

Download from 2 websites ( http & ftp )

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$ aria2c http://one/a.txt ftp://two/b.txt

Download using 2 connections per host

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$ aria2c -x2 http://one/a.txt

BitTorrent

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$ aria2c http://test.com/test.torrent

Metalink

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$ aria2c http://test.org/one.metalink

Download URIs found in text file

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$ aria2c -i url.txt