Undo everything in emacs

I am trying to associate the keyboard shortcut Control + F10 with gud-step in GUD in Emacs.

I thought the following would do the trick, but it doesn't:

(define-key gud-mode-map '[C-f10] 'gud-step)

Update

My mistake. The above actually works. Sorry for the confusion. Instead of deleting the question, we can close this thread in case if anybody ever needs to set up a similar keyboard shortcut.

I've tried apt-get purging and reinstalling emacs, but if I run:

Code: emacs ~/.bashrc I get a blank file (emacs.d) that looks like this:

If I run the same command as root:

Code: sudo emacs ~/.bashrc I get the correct file that looks like this:

I've never understood the buffer thing, but emacs has worked great for me in the past.

Hi, All.

I used to be able to undo actions all the way until a file was opened. Recently, I've been unable to do that, and I'm unable to undo actions beyond a certain point, which seems random, but might be related to the undo buffer size.

I was just wondering if anyone might have come across this problem, and if there might be a solution.

Thanks.

SG.

When typing Esc within an Emacs window under Unity (Emacs 23 standard package), the sound is turned on/off, but Emacs does not receive the key.

How can I change (probably) unity such that the Esc and also the other function keys are interpreted by Emacs?

A very crude workaround that always works in (GNU) Emacs is to use C-[ in place of Esc.

The question Why is the meta key is not working wh

To prevent confusion, I only run one "window" of emacs and so I use window in the emacs sense. I'm looking to get a window split which, let's say 70 in width, contains the completions buffer on the new split when I start emacs. I think I need to have a dedicated window.

In Emacs, how do I inspect what has been modified in a buffer (before saving and overwriting the file)?

(In a sense, the requested action is an analog of git status and git add -i showing what has been modified, only the comparison should be done between the buffer contents (in Emacs's memory) and the file on disk.)

Sometime, I forget what has been modified in a buffer, and would like to call a

I am using Linux Fedora 13 (Constantine) and emacs 23.1.1. I am trying to set up a .emacs file for initialization, by using emacs itself to edit and save a file .emacs in my home directory. However, although the file is there, emacs does not seem to recognize it.

I encountered a rather strange problem when using nano in general. When using the undo/redo shortcuts it just says "Nothing in undo buffer!" and nothing happens. Yeah, that's it. Anyone an idea how get undo/redo working in nano?

I upgraded recently to OpenSuSE 12.1 from 11.3 and now when I open any files in emacs from inside a screen session, I get a blank buffer. Let's say I open it as:

emacs myFile.txt

it will open to an empty buffer, not the file, and when I attempt to save something, it will ask for a file name to write to.