Most of the time I use the US qwerty layout but from time to time I also have to use the German layout which is qwertz and it is very annoying.
How can I swap the Y and Z keys on the German layout?
The solution was at this link: Custom Keyboard Layout in Ubuntu (or just Linux :) kindly provided by gertvdijk in his answer.
NB: In recent versions of Ubuntu you have to issue sudo dpkg-reconfigure xkb-data
for the changes to take effect. See this answer.
This how-to should do the trick for system-wide keyboard remap of single keys: FAQ: How to disable/remap a keyboard key in Linux?
And this how-to is about creating your own custom keymaps: Custom Keyboard Layout in Ubuntu (or just Linux :)
It won't allow you to change it quicky using a shortcut. You'll need some scripting to do so, I guess.
However, from the first revision of your question I assumed you wanted to change layouts. You've revised your question, but here is how to change layouts:
From the tags I assume you're running Kubuntu (KDE) 12.04 changing layouts pretty straightforward:
This should cover keyboard layout and behaviour in your user session. For system wide settings including text console, see this question.
I can now select German (qwerty) in the Unity desktop in 14.04:
This gives me exactly what I want.
It is also possible to switch to this particular layout in the terminal:
There is absolutely no need to mess with the system's keyboard layout files!
It’s very simple. You should edit the German layout file; so open it through a Terminal (Ctrl+Alt+T):
sudo gedit /usr/share/X11/xkb/symbols/de
In the opened file, you can see “z” on the 27th line:
and “y” on the 38th line:
All you need to do is to switch y’s and z’s. Then save the file and close it.
Log out one time and log in back again to see the result.
To switch the
z
andy
keys in your X (graphical) session, execute the following command in a terminal in the session:a=52;b=29;c=xmodmap;d="$c -e '";$c -pke | sed -nr "s/^(keycode *)$b(.*)/$d\1$a\2'/p;t;s/^(keycode *)$a(.*)/$d\1$b\2'/p" | sh