Homework 1 is due

Passwords on *nix, /etc/passwd
	why I can't find out your password
	john the ripper

BASH and shells
	shell, terminal, these names
	Brief flowchart for a shell

Let's learn a command:  who
	Also w and finger

GUI on Linux:
	Window Manager
	Desktop Environment
	Display Manager
	I'll show you a couple

Time for a walk:  Some computers with names
	Name is often in the prompt
	Separate the computer in front of you from the one you are using
	Since you'll probably ask:  X11 forwarding over SSH
	Remote desktop is another way to do this

Interlude:  Why don't I have to type a password all the time?
	Cryptographic authentication (is stronger, depending)

Let's talk about networks!
	Enough for the moment, anyway
	Internet Protocol
	Addressing with IP
	Ports
	Standard ports

A bit more about how things work
	protocols
	DHCP, briefly, and the MAC address
	DNS, and 8.8.8.8

Ruining the magic kingdom:  Firewalls and NAT
	Some connections can only be initiated from one end
	Port forwarding (for NAT)
	A relay point on the outside
		- ssh can do this

Text editing, and nano
	text file compared to word processors
		- Word processors are for printers
		- So is .pdf
		- Not .html
		- You can eat cake with a spoon (MS Word for code is worse than this)
		- Source code is normally stored in a text file
	nano:  Easy to learn, syntax highlight, generally ok
	gedit: Easy to learn, syntax highlighting, generally ok, needs GUI
	vim:   Not as easy to learn, LOTS of features, has a graphical version
	emacs: Medium learning difficulty, LOTS of features, has graphical version
	You need to know how to use a text editor to be competent on Linux
		- I use vim, but that doesn't mean you should
	
We talked about the file tree a bit yesterday
	But now a tour!
	Slash direction is opposite DOS/Windows
	Case matters!
	/tmp
	/etc
	/home
	/dev and /proc
	/root (and who is root?)
	/bin, /usr, /opt, /sbin, /sys, /lib, /lib64
	/var and /var/log
	/usr/share/doc

Special characters in filenames:
	Spaces 
	/
	- (not special)
	. (not special)
		Linux does not require file extensions
		They are commonly omitted on regular text files
	~ (your home directory, if it is first)

Let's learn another command:  grep
	grep and files

Finally:  pipes (combining grep and who)

Practice Exercies:
	1.  Figure out when isoptera was last rebooted, to the nearest second (use uptime and man)
	2.  Make a simple text file in each of the editors above.  You might have to do a little reading to figure out how to do this in vim and emacs.