How to get back into command line interface
 

I have fedora core 4. When I boot my computer, it loads into KDE automatically. I know I can access CLI by going to terminal. Is there a way that I can change it to boot right into CLI.

Thank you very much.

in /etc/inittab change line:

id:5:initdefault: to read: id:3:initdefault:

This will put you in full multiuser command line mode (just like if you had used alt>F1 etc..

\you will have to start xserver manually by doing this.
You may want to do a google for grub and custom configure grub to give you the option of bootint to run level 3 instead. this way t boot you will still have the option of booting to level 5
also if you select the kernel you want to boot and press e instead of enter you can (if you know the options) boot to different runlevels that way. I would suggest reading the docs about grub to get more detailed info.