When downloading big files it necessary to pause the download many times. A big file can be downloaded by using wget. First start download, then kill wget, then resume download by wget -c.
I want to pause downloads too many times depending on events such as power failure, Network unavailability, etc... and want to automate it using a script. So pressing Ctrl+C is't an option. I know a process can be paused by kill -STOP "$pid" The pausing should not close the connection to the website, either it should wait for resume command or the bandwidth throttled to very low data useage.

How to pause aria2 download is a partial solution but option pause is not supported in my aria2 (1.8.0, Ubuntu 10.04 LTS) and I can't upgrade aria2 (From apt-get install or manually install ). This RPC option for aria2 seems to works from Ubuntu 11.10. So a portable version of aria2 is also considerable.

Looking for
I'm looking for a download manager which is capable of throttle bandwidth and pause/resume all (or one ) the running instance of download upon execution of a --throttle=10K, --pasue switch or something like that, and resume it on a --resume switch (Or using other ways such as RPC).

I know killall -9 $(pidof downloader) should stop all downloads and can be resumed from the last point. But this only a bad choice for me as the number pause/resume is too high and the time to make connection to the server (where download file locate ) is a wastage of time and bandwidth.

aria1 can do some job by --stop switch. But it's obsolete and solves it partially.

  • I use a windows app that allows you to throttle, pause and resume but not script. I use it under wine and found it useful, is that enough? Or is scripting a must have feature?
    – Meer Borg
    Apr 4, 2013 at 5:44
  • No. There are many DM capable of throttling. I need to throttle running instance from commandline. Anyway name your DM and wine version.
    – totti
    Apr 5, 2013 at 2:18

8 Answers 8


I'm using JDownloader. However, AFAIK running instance cannot be controlled by command line.

On the other hand, there are add-ons like: - JD Scheduler or - JD RemoteControl

which can do a great job.

See: http://jdownloader.org/home/features http://jdownloader.org/home/addons

(I guess that there will be more tools, maybe someone else will add another suggestion...)

  • Anyone some example please.
    – totti
    Apr 4, 2013 at 18:56
  • Even if your answer doesn't answer my question, it helped me to find the solution completely ( See my answer). So I award you the bounty
    – totti
    Apr 7, 2013 at 9:34
  • Running instances can be stop/resume without add-on
    – totti
    Apr 7, 2013 at 9:35

I strongly recommend Flareget. it's free but you have to buy browser integration. here is it's features:

Developer Webpage

Download flareget

Dynamic File Segmentation: It uses a robust dynamic file segmentation algorithm to speed up the download. It supports up to 32 segments per download

HTTP-Pipelining: In addition to dynamic file segmentation, each segment is further accelerated up to six times

Auto Segmentation: When one segment ends, it starts another segment to help terminate another segment more fast

Enhanced Browser Integration: The only download manager for Linux which integrates with all the browsers to snatch away download url and start the download by itself. It does this magic without any addons

Multi-protocol support: It supports HTTP, HTTPS and FTP protocols to let you download files from internet. It also supports Metalinks

Intelligent file management: It uses an intelligent file management system to automatically categorize your files based on their extensions. All the downloads are grouped in different folders as per their categories.

Resume support: You can pause the downloads to download them later, you needn’t start from the beginning again. It also automatically retries when a segment or download fails

Add or remove segments: You can add or remove download segments dynamically without interrupting the download

Clipboard Monitoring: No need to copy paste your download links, it monitors your clipboard

Limit downloads: You can limit the number of simultaneous downloads, when one download ends, another starts automatically

Flash video download: One click flash video download from most of the sites is supported for all the browsers.

Smart Scheduler: You can easily schedule flareGet to download files automatically. It allows you to start and pause downloading files at the set time.

Batch Downloads: You can simply import urls from a text file (each link in separate line) or an html file and download them all.

Multi language support: flareGet is being translated into many languages, currently English, Arabic, Italian, Chinese(Simplified), French, Czech, Bengali, Spanish and Brazilian Portuguese are available.

  • No CLI or RPC to use in script
    – totti
    Apr 7, 2013 at 9:46

Finally I solved the question (Thanks @rostislav-stribrny )

JDownloader is capable of handling running instance of download (throttle, pasue, resume, add etc) .

  1. Download and install JDownloader (Tested in v0.9)
  2. Launch it
  3. Install add-on JD Remote Control (Addons -> Addons manager-> JD remote)
  4. Enable JD Remote Control (Addons -> (tick))
  5. goto or http://localhost:10025/help ( IP:port )

To throttle all running download to 10K http://localhost:10025/action/set/download/limit/10 From terminal wget http://localhost:10025/action/set/download/limit/10
To pause : wget http://localhost:10025/action/pause


despite you seem to be looking for something very specific, and despite you solved it already, I would still like to recommend uGet, I've been using it sindce 12.04 (12.10 64 bits now) and I am very satisfied with the results!

  • No uGet ( uget-get ) didn't answer me as I need to throttle running instance of download from a script.
    – totti
    Apr 28, 2013 at 10:05

If you are in 10.04 get a copy of downloader for X

sudo apt-get install d4x

Will do everything you want :)


  • It meets nothing.
    – totti
    Mar 31, 2013 at 19:02
  • OP wants a command line tool, which this definitely isn't. Apr 4, 2013 at 16:49

FlareGet 1.4-7 which is going to be released next week, supports all the features you need and even supports throttling of downloads. Here is the changelog

Here is the image, of the pre-release version showing speed limits: enter image description here

  • No CLI or RPC to use in script
    – totti
    Apr 7, 2013 at 9:46

Try Flareget, it has all and has its own PPA.


I am user of fatrat. Thats the best download managee I have in Ubuntu . Fatrat low in size and best in performance.

sudo apt-get install fatrat

the above command will install the fatrat.

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