Since you all know C++ anyway:
	Let's talk about file descriptors!

I'm going to stay within the C subset for this one
	The API is in C anyway, so this changes very little
	printf instead of cout, includes are a little different
	It'll probably compile with C++

Unix-like systems use these to refer to multiple things:
	files
	standard i/o
	network sockets
	pipes
	special files (device nodes, etc)
	A bunch of kinda strange uses

Family of functions to manipulate these:
	open
	read
	write
	close
	There are quite a few more

Quick program that opens files and does something with them

Reading from non-files:
	0 - standard input
	1 - standard output
	2 - standard error

End of file:
	ctrl+d enters an end of file character
	Stops terminals, etc

Redirection, then:
	>  (Warning:  Overwrites files and does NOT ask if you're sure!)
	>>
	2>
	2>>
	< 

/dev/null as a target for redirection