Things to know for the CS 302 final exam


Users
	How do I add a user?
	What information is in /etc/passwd, /etc/shadow, /etc/group and /etc/gshadow
	What is a userid?
	userid = 0 means what?

Permissions
	How to read the output of 'ls -l'.
	What permissions do I need to read/write/execute/delete
	How do I change permissions

Crontab
	crontab -e -- edits the crontab
	crontab -l -- lists the crontab
	crontab --help 
	Can you do something like "Every tuesday at 3:12am"
	Can you do "every hour"

Apache
	What is documentroot?  Where is it set?
	If I try and access http://me.nmu.edu/~fred, which files will it look for?
	Where are the log files?
	What is the difference between mods-available and mods-enabled
	The <Directory ..> thing.

Email
	SMTP vs POP vs IMAP
	What is mydestinations?
	How do I make an alias?  What's the file, and what's the command?
	How do I make a .forward?  Where does it go?
	Where are the log files?
	What is relay access denied
	How do we block spam
		black lists
		baynsian analysis
		features of the email header

Command Line
	How do i find out if a service is running.
	How do I find a file given it's filename? (find command)
	How do I find a file given some text within the file (grep command)
	What is /dev/null and how do I throw away errors?
	What are the filename matching wildcards.
		* - zero or more character
		? - one character
		[0-9] - one character in a range
	Piping:  What does "ls | wc -l" do?  How many programs run?
	Given the output of 'ls -l' who can read/write/delete a file?
 
Shell Scripting
	What does #!/bin/bash do?
	How do I run a command and put the results in a variable (backtics)
	How do for loops and while loops and if statements work?
	Know how cut works.
	Know what backtics ` do
	For loops in shell (i.e. for i in /home/*)
	What is $1 and $2?

Samba
	How do I make a share named after a user?
	How do I set someone's password?
	How do I delete their account?
	How do I make a share not named after a user?
	How do I make a share read only?

NFS
	What infomation is in /etc/fstab?
	What infomation is in /etc/exports?
	How do I mount one time only by hand (the mount command)

The Cloud
	About how much does it cost to have a cloud computer
	What are some advantages (cheap, great connectivity, reliable, no labor for setup, etc)
	What are some disadvantages (not on local wire, secrecy etc)
	
Does anyone run servers on bare metal in 2021? (Yes, but the trend is strongly towards fewer)

Apt-get
	install
	delete
	purge