This seems to have changed in recent Ubuntu versions and running
sudo apt-get install console-common will try to remove other packages. So, for recent Ubuntu versions, use this instead:dpkg-reconfigure keyboard-configuration
The simplest way would indeed be as @steeldriver suggested to open a terminal and run this command:
sudo apt-get install console-common
That will install the
console-common package and in the process allow you to chose your console layout. If that is already installed, use this to bring up the same wizard and set the layout:sudo dpkg-reconfigure console-data