Warm-up pipe exercise:
	What type of CPU does the system have?
		Just that, not anything else from cpuinfo

A side note:  Typing speed
	The command line is easier to enjoy if you're fast
	Tip #1:  Type less characters
		Use up arrow for last command
		Use ctrl+r to search recent commands
		Use tab to autocomplete whenever you can
		Use shorter paths if you can (often ~ or whatnot can help)
		Name files in a consistent way that you can remember
		Remember short flags for commands you use often
		Learn how to take advantage of your text editor's features
		At first, this time may make you spend longer thinking
	Tip #2:  Keep your hands loose and relaxed
		Piano teacher recommendation:  Pretend bubble
	Tip #3:  Don't try to go too fast
		Mistakes slow you down more than anything else
	Tip #4:  Use a font you can read easily
		I see people waste time by not noticing a typo
	Tip #5:  If you look at your hands, learn not to
		F and J have bumps to keep your hands in the right spot
		Layout is actually pretty standard for symbols in USA
		This includes symbols like | and / and " and ' and ;
	Tip #6:  Find a keyboard you actually like
		Cheap way:  Try a bunch of used ones, especially Dell
		Not cheap way:  Buy one with mechanical switches
		Keyboards that click:
			IBM model M
			Unicomp
			Cherry Blue
			Clones of the cherry blue
		Keyboards that don't click but have feedback:
			Cherry brown
			Romer G
		Keyboards that have light touch (mostly for gaming)
			Cherry red and clones
		Short stroke keyboards:
			Laptop keyboards are that way, but you can get desktop ones too
			Apple sometimes ships these
	Tip #7 that I actually don't do:  Remap ctrl
		It's in an awkward spot and used with other keys
		Caps Lock is in an easy spot and not used with other keys
		You can get a keyboard with them in different spots
		Or, switch in software
		Makes it slightly harder to use computers that aren't yours
		Lenovo puts ctrl in a weird spot, and I got used to that
	Tip #8 that I don't always do:  Posture
		If you're sitting weird, you'll be slow
		Arms about level, whether standing or sitting
	Tip #9:  Clean your keyboard
		Thorough:  Remove keys, use ultrasonic cleaner
		Quick:  Blow out underneath keys, spray and wipe
		Either way, if you hesitate to touch them, it's time
	Tip #10:  Just keep using it, and you'll get faster
		It takes a while

Homework 4 and check_vars.py
	Let's look through the program
		This might take a while

Shell Colors
	Used for prompts and such
	Can be done in a library
	Like the one in scolor.py