Ok, realmente era isso que eu procurava...
Agora surgiu outra dúvida: quais os arquivos de configuração que devo alterar para inicializar o sistema com o novo mapeamento do teclado?
Fiquei um pouco perdido nessa parte do texto :
Automatic setup
The setkeycodes command has to be run once at system start. How it is done depends on you choice of distribution. On Debian Linux you must create an init.d file, e.g., /etc/init.d/logitechkbd which has to be linked to the system startup directories. This is done with the command
update-rc.d -n logitechkbd start 75 S .
The file /etc/init.d/logitechkbd can be downloaded below.
Next, you need to run the above xmodmap commands whenever you start X-windows. The easiest is to have the commands in a file, say ~/.Xmodmap_logitech which is then run from whatever scripts starts your X-session. The command is:
xmodmap ~/.Xmodmap_logitech