My friend told me that her old laptop got virus and someone helped her install a strange free OS that she doesn’t know how to use. She even doesn’t know how to call it. I immediately guessed it is Ubuntu. Six years ago I came across this product as a free Ubuntu disk was in the lab. I didn’t try it but remembered it. Nowadays, it spreads quickly and its applications are all free and open source. Actually, I’d like to try the Ubuntu Edge after read the post “Ubuntu Edge: A case of mistaken identity“.