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aria2 is a utility for downloading files. The supported protocols are HTTP(S), FTP, BitTorrent (DHT, PEX, MSE/PE), and Metalink. It can download a file from multiple sources/protocols and tries to utilize your maximum download bandwidth.

It even supports downloading a file from HTTP(S)/FTP and BitTorrent at the same time, while the data downloaded from HTTP(S)/FTP is uploaded to the BitTorrent swarm. Using Metalink’s chunk checksums, aria2 automatically validates chunks of data while downloading a file like BitTorrent.

Aria2 Features

• Command-line interface
• Download files through HTTP(S)/FTP/BitTorrent
• Segmented downloading
• Metalink version 3.0 support(HTTP/FTP/BitTorrent)
• HTTP/1.1 implementation
• HTTP Proxy support
• HTTP BASIC authentication support
• HTTP Proxy authentication support
• HTTP gzip, deflate content encoding support
• Chunked transfer encoding support
• Load Cookies from file using the Mozilla/Firefox(1.x/2.x) and 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
• 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
• Parameterized URI support

Install aria2 in debian

sudo aptitude install aria2

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