Can I use getamap on a Linux system?
It can be used on a linux system if you don’t mind using the patched version of wine recently created to enable Netflix to work (it didn’t work previously on Linux systems for the same Silverlight-related reason), in conjunction with the Windows version of Firefox. Googling around Netflix wine should show you the way.
But personally, I wouldn’t bother, except as an "exercise for the reader". There are lots of websites offering similar functionality without any of the need for this kind of pain.