>Memory is to hard to measure

>Inspired from the comment "It saves zero memory" from here
https://bugs.launchpad.net/ubuntu/+source/upstart/+bug/501241

I've been trying to keep my eye on Ubuntu's memory usage for some time now, but there has never been a great way to measure memory usage.  Here is an alternate memory tracking idea.. Don't bother trying to observe it directly.  These are the steps I followed to prove that removing tty2-tty6 will save us more than zero memory. 

1. Figure out how much your computer (when booting off of a liveUSB in my case) needs to boot, open a terminal, and run free -m with using almost no swap.
   
   [make sure the computer has a swap partition, or else this won't work]
   
   Do this by booting the kernel with different mem=???M options.  And try getting swap close to zero (see it with free -m), but still in positive territory by a few.  Mine was mem=450M, and swap used was 3 M
   
2. Then make your changes, in my case rm /etc/init/tty[2-6]
3. Reboot with the same kernel option (mem=450M), run the terminal, run free -m and rejoice in the lack of swap used.