Download file with multiple simultaneous connections

aria2c -s 4 http://my/url
`aria2c` (from the aria2 project) allows. Change -s 4 to an arbitrary number of segments to control the number of concurrent connections. It is also possible to provide multiple URLs to the same content (potentially over multiple protocols) to download the file concurrently from multiple hosts.

By: jrk
2009-08-11 22:34:00

1 Alternatives + Submit Alt

What Others Think

isn't this considered rather bad netiquette?
thebillywayne · 649 weeks and 1 day ago
You may encounter the certificate verification error with HTTPS server.
hemanth · 649 weeks and 1 day ago
It was just as bad when "puf" did it, 5+ years ago :-)
eichin · 649 weeks and 1 day ago
firefox extension downthemall does this - why is it considered bad?
stuntkiwi · 594 weeks and 2 days ago
It is recommended to keep number of simultaneous connections to a maximum of 2 per host, as per RFC2616. As to why more is bad: you might hose the available resources of the host, and this could be bad for high-traffic hosts. Some programs like DownThemAll have default settings that take this for granted. I always set the number of simultaneous connections to 1 per host when installing DownThemAll. Apart from above sideline notes, this command is how you download with simultaneous connections. If you want to spread across mirrors, just add the mirror URLs. E.g.: aria2c -s 4 http://my/url http://my_mirror1/url http://my_mirror2/url ...
syockit · 554 weeks and 4 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

You must be signed in to comment.

What's this? is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.


Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: