[Wget] ubuntu 默认已有
[Aria] sudo apt-get install aria
[Curl] sudo apt-get install curl
[Downloader for X] sudo apt-get install d4x
[Gwget] sudo apt-get install gwget
[Kget] sudo apt-get install kget
[axel] sudo apt-get install axel
另外, firefox也自带了一个下载软件.
