I'm trying to achieve the following mapping
keycode 135 = <Ctrl-C>

Is it possible to achieve this in some way?


3 Answers 3


That's not possible with xmodmap. I don't think it's possible with XKB either, but I'm not sure.

Is your aim to have a key that's always identical to pressing Ctrl+C (e.g. in a terminal, it would interrupt the running program), or to have a clipboard copy key? If the latter, try

keycode 135 = XF86Copy

The XF86Copy keysym is intended for a copy-to-clipboard key, but I don't know how many applications have that shortcut out-of-the-box.

If you're on Ubuntu, and possibly even if you aren't, the recommended method to set up additional (“multimedia”) keys is keytouch.

If you really want the key to be equivalent to Ctrl+C, your desktop environment or window manager may let you bind the keysym to a command that generates key press and release events for that key combination. If you prefer or must use a DE/WM-agnostic method, you can use xbindkeys to bind an arbitrary shell command to a key, and xmacro to manufacture key events to send to a window. You'll still need to have a keysym associated with the key; a good choice is F13 (or wherever the numbered function keys on your keyboard leave off). Then put this in your ~/.xbindkeysrc:

"{ echo KeySymPress Control_L; echo KeySym C; echo KeySymRelease Control_L; } | xmacroplay"

You'll need to start xbindkeys with your X session — from your ~/.xinitrc or ~/.xsession if you have one, or from the appropriate configuration interface in your DE/WM.

  • Thank you. I'd like to achieve that always when I press the key between right alt and right ctrl (keycode 135) it will be the same as Ctrl+C (This is only example, I'd like to use more keys that aren't utilized on my keyboard and assign them shortcuts Ctrl+A, Ctrl+B, Ctrl+C etc., it doesn't matter what is the function (e.g. copy)). Could you achieve it with another program (xbindkeys, xmacro)?
    – xralf
    Apr 12, 2011 at 18:39
  • You can also try xdotool, it's a bit easier to use than xmacro.
    – Ben Davis
    Sep 8, 2015 at 22:29

Have you tried Autokey ? It is a much easier way than xbindkeys or xmacro.


xmodmap -e 'keycode 133 = Menu

133 in this case is Super (ubuntu logo on touchpad)

  • 4
    Hi and welcome to the site. Could you please add some context? Is this a command? A configuration setting? On what operating system? Why would there be an Ubuntu logo on a touchpad? Did you mean keyboard, and even so why would there be an Ubuntu logo there? Could this maybe be specific to your system? In any case, how would this help if the OP wants to map the key to Ctrl+C?
    – terdon
    Jun 12, 2022 at 16:47
  • 1
    There also seems to be a missing single quote in your command. The user in the question wants to map Ctrl+C with key code 135.
    – Kusalananda
    Jun 12, 2022 at 17:03

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