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Today at school I heard the most amazing, un-backed news. Apparently a group of hackers (not in the destructive sense) made some additions or changes to Mac OS X, allowing it to be run from PC hardware, as a pose to Mac hardware.
Recently I was looking for resources to help in doing commands through the linux shell (or commonly referred to in windows as "command line"). I came across an absolutely excellent tutorial site at linuxcommand.org.