Changing keyboard layout to Dvorak in Ubuntu-server
I found this more straightforward and simple:
sudo dpkg-reconfigure keyboard-configuration
This will guide you through the process of selecting different keyboard layouts:
$ dpkg-reconfigure console-data
Maybe you will need to install console-data.
$ sudo apt-get install console-data
If you want to make changes permanent then you can use:
$ dpkg-reconfigure console-setup
Looks like this will work, too:
$ sudo loadkeys dvorak
Hat tip to http://ma.tt/2004/01/dvorak-on-linux-console/