What's the simplest way to map "CTRL + ALT" to "AltGr"?

[Ottavio Caruso <ottavio2006-usenet2012@yahoo.com>]

Is there a simple way, without installing gazillion programs and 
tweaking tens of configuration files, to have at startup the combination 
of CTRL and left ALT produce the same result as AltGr? This must work 
for both console and Xorg.


$ localectl
   System Locale: LANG=en_GB.UTF-8
       VC Keymap: n/a
      X11 Layout: de
       X11 Model: pc105
     X11 Options: grp:win_space_toggle  # <-- What does this mean?



$ cat /etc/default/keyboard
# KEYBOARD CONFIGURATION FILE

# Consult the keyboard(5) manual page.

XKBMODEL="pc105"
XKBLAYOUT="de"
XKBVARIANT=""
XKBOPTIONS="grp:win_space_toggle"
BACKSPACE="guess"

$ cat .xsessionrc
LC_NUMERIC=en_GB.UTF-8
LC_MONETARY=en_GB.UTF-8
LC_PAPER=en_GB.UTF-8
LC_NAME=en_GB.UTF-8
LC_ADDRESS=en_GB.UTF-8
LC_TELEPHONE=en_GB.UTF-8
LC_MEASUREMENT=en_GB.UTF-8
LC_IDENTIFICATION=en_GB.UTF-8
LC_TIME=en_GB.UTF-8
PAPERSIZE=a4
LANGUAGE=en_GB
LANG=en_GB.UTF-


Thanks


--
Ottavio Caruso

A: Because it messes up the order in which people normally read text.
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