I use Ubuntu and have been able to do everything I need to do except update the maps. I have experimented with QLandkarte, and I thought I was transferring map files to my Dakota via USB, but I never could find them on the GPS. So I'm apparently doing something wrong. I've also played around with Merkaator, but haven't had a lot of success with it either. I'm hoping someone can come up with an easy-to-use GPS mapping program for Linux.