Try a program called jDownloader. It's free and because it's written in Java, it's not platform dependent.
That means it will run in Linux, Windows, Mac or any other OS that has Java installed.
You can go to the site found here;
http://jdownloader.org/home/index
Download the installer that matches your OS. You will also need the Java Runtime jre installed.
If you have Ubuntu you can get it through the repositories. Other OS's can get it from Sun's website here;
http://www.java.com/en/download/index.jsp
When you unzip the downloaded file in Ubuntu you will have a folder with many files in it.
The one you want to use is the one named jDownloader.jar
Right click on it and select Java Runtime Environment as the launcher.
You will be greeted with a configuration screen. It will also ask if you want to install apt-get in your Firefox browser so it will automatically grab the links you selected and add them to the link grabber section of jDownloader.
I'm not going to provide support for this software. That can be found in their forums.
What I will provide is some basic info to make your life easier.
If you don't have a premium membership to Rapidshare or any other file share site make sure you set the number of maximum connections for each site to 1.
You may also set your maximum simultaneous downloads to 1.
You also have the option to set your download speed plus many other options although the above are the most important.
Below is a screen shot of my linkgrabber screen. It has all the links for my 20 in 1 multiboot DVD ready to be added into the download section.
So what can jDownloader do for you?
It can automatically grab selected links and add it into your linkgrabber screen ready to be downloaded immediately or later on.
No need to sit and wait in between downloads because of mandatory wait times. This software does it for you! It also grabs the captcha codes like at Megaupload and puts them in for you.
And after the download is finished, it extracts the file from the rar or zip file.
It also has the ability to download protected links like those being circulated in several forums.
JDownloader supports hundreds of file sharing sites.
You cannot believe how much this software improves life for non-subscribers of file sharing sites.
I add the links and start it before leaving for work and depending on the size of file and speeds, it is usually done by the time I get home.
No more wasted time watching the pc waiting for the 15 minutes to be up so you can start the next link.
This software does the waiting for you.
No more typing in the captcha code. jDownloader does it for you.
Make your downloading life easier and give jDownloader a try.
Enjoy!
TaZMAn