System setting for changing modifier keys?

[Christopher James Halse Rogers]

On Wed, Nov 26, 2014 at 5:45 AM, Barry Warsaw <barry at ubuntu.com> wrote:
> Are there any plans to make changing modifier keys more human 
> friendly in
> Vivid (unity8 perhaps)?
> 
> AFAICT, the only way to change modifier keys (e.g. swap control and 
> caps lock,
> remap left & right alt) is to use the tried and true xmodmap, but 
> this is far
> from user friendly.

What's even worse is that this isn't the best place to do this - what 
you really want to do is set

XKBOPTIONS="compose:menu,ctrl:nocaps"

in /etc/default/keyboard; then this is applied everywhere, even VTs.