" Keep in mind, however, that the critical issue relating to the word ???free???
is ???freedom,??? meaning that you are free to rebuild, reuse, reconfigure, and otherwise do what you
like with the code. The only major responsibility is that if you change the software, you pass it forward
so that others may benefit from your work as well.
Linux is a full-blown operating system that is a free clone of the powerful and stable UNIX operating
system. Start your computer with Linux, and Linux takes care of the operation of your PC and
manages the following aspects of your computer:
Processor??”Because Linux can run many processes from many different users at the
same time (even with multiple CPUs on the same machine), Linux needs to be able to
manage those processes. The Linux scheduler sets the priorities for running tasks and
manages which processes run on which CPUs (if multiple processors are present). The
scheduler can be tuned differently for different types of Linux systems. If it??™s tuned
6
Linux First Steps Part I
properly, the most important processes get the quickest responses from the processor. For
example, a Linux scheduler on a desktop system gives higher priority to things such as
moving a window on the desktop than it does to a background file transfer.
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