I am trying Linux again after many years, and I have installed Ubuntu 12.10. I have downloaded the full GNU Emacs24 package, but I cannot get it to launch a text editor.

Can someone tell me what I have to do to get it to launch?

I keep getting:

emacs ~/test.txt

The program 'emacs' can be found in the following packages:

 * emacs23

 * emacs23-nox

 * emacs24

 * emacs24-nox

 * e3

 * emacs23-lucid

 * emacs24-lucid

 * jove

Try: sudo apt-get install <selected package>

Any help is appreciated.