Whats a “distribution” or “distro”?
A Linux “distribution” (or “distro”) is a packaged set of Linux and related utilities. Some distributions are designed for end-users, some are designed to run servers, some are designed for certain hardware, for example for Intel processor (and compatible) PCs vs. Apple Macintosh computers. Most popular Linux distributions also include one or more Graphical User Interfaces (GUIs) and free programs such as internet browsers, word processors, e-mail programs, etc.