how do i install the kernel and nothing else
 

lets say that i have a machine with nothing on it and i want to install just the linux kernel and no other part (just the command text interface) where do i download this

That isn't going to fly ... "the command text interface" is going to
require at least libc on top of the kernel. What's your objective anyway?

A bootloader might come in handy too ...
smeezekitty has recently posted re his kernel.

Check linux from scratch.

The "command text interface" (typically bash) is separate from the kernel...you probably won't get much use out of just the raw kernel, as you won't be able to tell it to do anything without a CLI. :)

If you're looking for a minimal Linux distribution, then check out things like Slackware (allows you to choose exactly what software packages are installed/not installed) or LFS as mentioned above (build/configure everything yourself, including the kernel). What exactly do you need this minimal system for?

You can get the kernel with any Linux distro. Or you can take any distro and just delete everything except the kernel, bootloader, and bootloader config files.

As implied by previous replies, all will be well for a few milliseconds--until the kernel tries to call "init".

Just the kernel itself is not a functional OS. You need at least basic commands/programs, and a shell (provided by GNU) to have a command-line working environment.

thats what i want an os but with only a terminal and all of the commands that are involved in a linux os

im hacking my psp to run linux so we can use aircrack it doesn't require a gui everything is done in the terminal

Just take a distro and omit the installation of X Window System, Desktop Environments, Window Managers, GUI Apps, etc.

I don't know if most distros can do that but I was able to install Debian without the GUI once.

Gentoo, Slackware and LFS.

Arch

heres an idea what if i can download Unix then install it to my psp (don't know how but i'm sure the guys at pspmod.com can explain) then download the Linux kernel and install it to the Unix os i have install

would you recommend freeBSD Unix or just plain Unix (i would like just plain Unix but is FreeBSD Unix the same)

here is an interesting link
http://www.tech-faq.com/download-unix.shtml

This is to deal with Embedded linux. Check for RTlinux or uClinux or other embedded system linux links. like
http://www.linuxfordevices.com/c/a/N...d-to-Sony-PSP/

embedded linux is one of the best choices for your purpose. be sure about what kind of CPU architecture you are using though.

cheers
tim

From Wikipedia: CPU: MIPS R4000-based; clocked from 1 to 333 MHz