Is there a download manager that can open multiple connections to the specified URL and download part files only to join the files later and present it as one single file?
I know about wget, but as far as i know, it opens a single connection to download. (Though can resume a interrupted download)
Is there such a download manager or a command line tool available?
Yes, there is. Run the following commands to install:
Use aria2 basically just like wget. I believe the default number of connections is 4 but you can change this by using the -x flag followed by the number of connections you would like to make. For example, to make 8 connections:
click here for more info
Also, you can use the DownThemAll extension for firefox.
In addition to aria2, there is uGet which has a GUI as well as command line options.
Run the following commands to install uGet:
It can also use aria2 as a backend engine if you want.
http://uGetdm.com