Install Aria2 (Command-line download manager) on RHEL/CentOS and Fedora linux

Aria2 is a lightweight multi-protocol & multi-source command-line download utility. It supports HTTP/HTTPS, FTP, BitTorrent and Metalink. Aria2 can be manipulated via built-in JSON-RPC and XML-RPC interfaces.
Aria2 1.18.3 latest release. This release fixes the bug which may cause assertion failure after multi-file downloads (e.g., multi-file metalink or torrent) are performed several times due to the bad handling of –bt-max-open-files option.

Changes

• Fix crash if unpause failed before assigning BtProgressInfoFile object
• Enable and check PIE in makerelease-osx
• Fix bug that numOpenFile_ is not reduced when MultiDiskAdaptor is deleted
• This bug caused assertion error in RequestGroupMan::ensureMaxOpenFileLimit

Features

• Command-line interface
• Download files through HTTP(S)/FTP/BitTorrent
• Segmented downloading
• Metalink version 4 (RFC 5854) support(HTTP/FTP/BitTorrent)
• Metalink version 3.0 support(HTTP/FTP/BitTorrent)
• Metalink/HTTP (RFC 6249) support
• HTTP/1.1 implementation
• HTTP Proxy support
• HTTP BASIC authentication support
• HTTP Proxy authentication support
• Well-known environment variables for proxy: http_proxy, https_proxy, ftp_proxy, all_proxy andno_proxy
• HTTP gzip, deflate content encoding support
• Verify peer using given trusted CA certificate in HTTPS
• Client certificate authentication in HTTPS
• Chunked transfer encoding support
• Load Cookies from file using the Firefox3 format, Chromium/Google Chrome and the Mozilla/Firefox (1.x/2.x)/Netscape format.
• Save Cookies in the Mozilla/Firefox (1.x/2.x)/Netscape format.
• Custom HTTP Header support
• Persistent Connections support
• FTP through HTTP Proxy
• Download/Upload speed throttling
• BitTorrent extensions: Fast extension, DHT, PEX, MSE/PSE, Multi-Tracker, UDP tracker
• BitTorrent WEB-Seeding. aria2 requests chunks more than piece size to reduce the request overhead. It also supports pipelined requests with piece size.
• BitTorrent Local Peer Discovery
• Rename/change the directory structure of BitTorrent downloads completely
• JSON-RPC (over HTTP and WebSocket)/XML-RPC interface
• Run as a daemon process
• Selective download in multi-file torrent/Metalink
• Chunk checksum validation in Metalink
• Can disable segmented downloading in Metalink
• Netrc support
• Configuration file support
• Download URIs found in a text file or stdin and the destination directory and output filename can be specified optionally
• Parameterized URI support
• IPv6 support with Happy Eyeballs
• Disk cache to reduce disk activity

Installing Aria2 in RHEL/CentOS and Fedora

First enable RPMForge repository and install aria2 using YUM command tool.

# yum --enablerepo=rpmforge install aria2 -y

How to use Aria2

Command-line scares you off? No, aria2 is really easy to use!!
Download from WEB:

# aria2c http://example.org/mylinux.iso

Download from 2 sources:

# aria2c http://a/f.iso ftp://b/f.iso

Download using 2 connections per host:

# aria2c -x2 http://a/f.iso

BitTorrent

# aria2c http://example.org/mylinux.torrent

BitTorrent Magnet URI:

# aria2c 'magnet:?xt=urn:btih:248D0A1CD08284299DE78D5C1ED359BB46717D8C'

Metalink:

# aria2c http://example.org/mylinux.metalink

Download URIs found in text file:

# aria2c -i uris.txt

Set Download Speed Limit
To set download speed limit per download, use the following option.

# aria2c –max-download-limit=100K http://releases.ubuntu.com/12.10/ubuntu-12.10-server-i386.iso

Reference: Aria2

That is all!