locate:
	This runs fast, because it consults a database
		- updatedb updates the database
find:
	This doesn't use a database
	Tests, example:  -type (b|c|d|f|l)
	Another example:  -name
	man has a list
	Logic operators!  -and, -or, -not, ( )
		- Remember, the shell will still expand stuff
	Actions:  -delete, -ls, -print (default), -quit
	Actions can be in logical operators!
		- lazy evaluation and actions
	xargs vs. backticks
		- xargs will do multiple batches
		- xargs can do multiple processors
		- -n option, for separate invocation
		- Let's load isoptera and watch it heat up!

xargs example:  Download all CS228 assignments in parallel
	- Side note:  Web spider
	wget can already do this

Archives!
	tar is a common unix archive
		- "tarballs"
		- tar command manipulates these (-cf to make, -xf to extract)
		- Meaning of -f, standard input
	Unix philosophy:  A toolbox
	Compression!
		- gzip
		- bzip2
		- xz (LZMA, like 7zip without 7zip 		
	You can compress files that aren't archives
		- Example:  zcat and mysql error messages
	tar can run the compression program for you!
		- tar -czf, -xzf, some people use -czvf and -xzvf
	
Backups often use tar
	- Example:  annelid (is only kind of backed up)
	- Distributed systems, and distributed backup
	- Two is one, and one is none
		+ When the zombies arrive...

cron again
	- System administration:  /etc, cron has stuff in here
	- crontab command as a regular user

.zip archives:
	- These were popularized with WinZip, but they're not bad
	- zip tool, unzip tool
	- I use these more than .tar.gz
		+ Go with the flow

Securing the backup:
	Some archive tools can do this for you (example:  zip with -e)
		Quality varies
		You can usually decrypt individual files
		Maybe even update it
	Encrypt the entire archive:
		Use whatever encryption process you prefer
		You will have to decrypt the entire archive to see individual files
	Store it in an encrypted filesystem:
		Most user-friendly
		Anybody who can mount the filesystem will have access to the backup
	Encrypt the archive, burn it to a CD, bury it in the woods
		Or the cloud
	
Notes about backups:
	Most people neglect them
	Hardware really does fail sometimes
	The filesystem can also fail, but usually won't
	Setting up cron to make regular backups can be very helpful!