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From: Jesper Harder <harder@myrealbox.com>
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Subject: Re: Keymaps and Emacs and libreadline ?
Date: Tue, 19 Aug 2003 15:04:06 +0200
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"It's me FKtPp ;)" <m_pupil@yahoo.com.cn> writes:

>   I setup-ed libreadline so that I can use Emacs key-binding and
>   key-sequences to edit shell command lines. It works perfect in
>   X-terminal, but, when I switch to console mode(not X) the right-alt
>   key no longer act as a meta key like what left-alt key do :( I
>   viewed the keymap files and find out:
>
>     Keycode 56 = Alt
>     Keycode 100 = AltGr
>
>   What's the meaning of "AltGr"?? 

AltGr is used to write characters that might not otherwise be
accessible on the keyboard -- you hold AltGr down and press another
key.  Here some examples that work on my keyboard:

      AltGr e = €
      AltGr r = ®
      AltGr c = ©
      AltGr d = ð

But exactly what you get by using AltGr (if anything) probably depends
on you locale settings.

>   Why map right-alt to AltGr?

On many (European) keyboards the right Alt key is labeled as AltGr.

>   How can I configure right-alt do the same work as the left-alt do?
>   change keymap or change inputrc??

If you never need AltGr I suppose it's easiest just to map the right
Alt key to Alt rather than AltGr.