TEXT EDITORS

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EMACS

To edit a new or existing file, type at the shell prompt

	emacs FILENAME

To open file in emacs with cursor at line 132, type

	emacs +132 FILENAME

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 F1, F2 ... represent function keys
 C-<chr>    means: hold the CONTROL key while typing the character <chr>
	    Thus, C-f would be: hold the CONTROL key and type f.
 M-<chr>    means: press the Escape (ESC) key, release it, then type
	    the character <chr>. If no key is labeled ESC, try F11 or F12.

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Commands for Quitting and Saving
   C-x s      Save what you are working on
   C-x C-w    Write to a file -- will prompt for name (like "save as" on pc's)
   C-x C-c    Quit Emacs.

Commands for moving around and general editing
   Right arrow key    Move forward a character
   Left arrow key     Move backward a character
   Down arrow key     Move to next line
   Up arrow key	      Move to previous line

   C-v (or Page Down key)	         Move forward one screenful
   M-v (or key to left of Page down key) Move backward one screenful

   C-a	Move to beginning of line
   C-e	Move to end of line
   
   M-<	Go to beginning of file
   M->	Go to end of file

Cutting and pasting
   C-k	     kill from the cursor position to end of line
   C-y       yank (paste) text just deleted
   C-x u     Undo
   C-@       Set mark   (note; press Ctrl-Shift-@ together)
   C-w       Kill between cursor (point) and mark

Searching and replacing
   C-s 	                   Search forward for string 
   C-r 	                   Search backward for string 
   M-x replace-string      Global replace
   M-x query-replace       Conditional replace

For writing Ada programs
   F2   Global replace string
   F6   Check program for correct syntax (or use C-c C-v)
   F7   Compile and link program and create executable (or use C-c C-c)
   F8   Go to line (will be prompted for line number)
   F9   Compile and link program (redundant for this course)
   F10  Go to next error message (if used after F6 or F7)
   F11  Emacs help key on PCs
   F12  is Meta key on some PCs

Other useful commands
   C-h	   Help
   C-g	   Abort command (usually one started accidentally)
   C-L	   Clear screen and redisplay everything
   C-q     Unfreeze the terminal window

   C-x 1   One window (kill all windows except the one containing the cursor).
   C-x o   Go to other window

   C-x i   Insert the contents of a file at the cursor
  

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PICO

Pico is a simple, user friendly text editor. It does not have the multitude of 
features present in emacs, but unlike emacs it is fully self-explanatory.
An information line at the bottom of the screen always tells the user what
options and commands are currently available.

To edit a new or existing file, type at the shell prompt

	pico FILENAME

To open file in pico with cursor at line 132, type

	pico +132 FILENAME

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