Sticky bit and Stealing Files with Vim
	Directory owner can move files around
	Demo:  directory owner "steals" file
	People with permission can move files around
	Demo:  non-owner "steals" file in root-owned directory
	Reason for the sticky bit:  To prevent this!
		Last time we were in a subdirectory with different permissions

.profile, .bashrc, .bash_profile
	.profile can be read by a variety of shells
		- If you only use one, this doesn't matter
	.bashrc read by subshells but not .profile
	source command
	bash functions
	It's a shell script!
		- We can write those if we like
	There's a chapter on prompt customization if you like (13)

shell variables:
	Setting with export
	$ to use later

alias:
	It lets you have a different name for a command

functions:
	These take parameters, and can call each other
	Using a function vs. a script:
		script can be run as a program
		script can be moved around easily
		script runs as a child of the shell
			Try cd inside it, or setting a shell variable
	A lot of the time, you have a choice here

What happens if you make a bad mistake?
	You can install a new .profile in some non-shell-using way

Shell Colors
	Used for prompts and such
	Can be done in a library