[CALUG] Linux resource usage

[Jason C. Miller]

Hey all.  :)

I'm looking for a good way to monitor resource usage for a linux machine. 
Redirecting 'top' to a file only goes so far and I'm NOT looking to do 
something as drastic as SNMP.  Here's what I'm looking for 
in a solution:

1. No extra software purchase/download necessary
2. If software download is mandatory, that it be extremely minimalistic
3. Uses the default linux toolbox of utilities
4. Something thorough (seperate CPUs, memory, I/O)

It could be that something simple already exists and that I've missed it. 
If you know of a cool utility, script, or method that I can use to 
accomplish this, please chime in.

                                 ~j