I'M rather new to Linux and I've just started with Ubuntu. I'M trying to understand the file system. I see that rather than a traditional drive letter like C: , Linux uses a single /. But I guess my real question is, where are programs stored? In Windows they're stored in X:Program Files\. One other thing, what is the file extension for a program launcher, the linux equivelent of a windows .exe? I was trying to find the launcher to a program but found myself unable to be specific enough to find what I needed with an extension.