xev will
output a message like this on stdout:
KeyPress event, serial 29, synthetic NO, window 0x3a00001,
root 0x119, subw 0x0, time 342476839, (176,174), root:(1062,320),
state 0x10, keycode 38 (keysym 0x61, a), same_screen YES,
XLookupString gives 1 bytes: (61) "a"
XmbLookupString gives 1 bytes: (61) "a"
XFilterEvent returns: False
KeyRelease event, serial 29, synthetic NO, window 0x3a00001,
root 0x119, subw 0x0, time 342476939, (176,174), root:(1062,320),
15.5
15.5 Controlling the Mouse 223
state 0x10, keycode 38 (keysym 0x61, a), same_screen YES,
XLookupString gives 1 bytes: (61) "a"
From this output you can see that the keysym for A is 0x0061; append a line to the
xmodmap file disabling that key:
keysym 0x0061 =
15.5 Controlling the Mouse
The middle and left mouse buttons can be used to access special features of some
programs. For example, if you highlight a URI in Firefox and press the middle mouse
button on a nonlink portion of a web page, the browser will load the page at that
URI. Likewise, the right mouse button provides a pop-up menu of features that you
may not want your users to access, such as saving onto the local filesystem.
You can configure which physical mouse buttons generate which button event using
xmodmap.
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