Free up more memory (ubuntu)

we’re going to free up RAM by disabling some virtual consoles that use up memory—even though most people never use them. To do that, we need to edit the inittab file in the etc directory. In the terminal, type:

sudo gedit /etc/inittab

This will again call up the text editor, this time with inittab loaded.

Scroll down until you find the six lines that begin with:

1:2345:respawn:/sbin/getty 38400 tty1



N.B:- tested on dapper
see:- http://www.chinwong.com/index.php/site/article/ubuntu_speed_up_tips/