What are Debian, RedHat, Caldera and Suse etc. Explain the different Linux distributions?
Linux is really just the `kernel’ of the operating system. Linux in itself is just a 1 megabyte file that runs the rest of the system. Its function is to interface with hardware, multitask and run real programs which do tangible things. All applications, network server programs, and utilities that go into a full Linux machine are really just free software programs recompiled to run on Linux – most existed even before Linux. They are not part of Linux and can (and do) actually work on any other of the Unix systems mentioned above.
