Remapping keyboard layout Rpi "gb" -> "us"

So, from the command line execute the following command;

sudo nano /etc/default/keyboard

This will present the keyboard configuration file which will look something like the following;

# KEYBOARD CONFIGURATION FILE

# Consult the keyboard(5) manual page.

XKBMODEL="pc105"
XKBLAYOUT="gb"
XKBVARIANT=""
XKBOPTIONS=""

BACKSPACE="guess"

Edit the file to implement the United States character keymapping by changing the file to the following;

# KEYBOARD CONFIGURATION FILE

# Consult the keyboard(5) manual page.

XKBMODEL="pc105"
XKBLAYOUT="us"
XKBVARIANT=""
XKBOPTIONS=""

BACKSPACE="guess"

Then we need to reboot the Pi to let the changes take effect;

sudo reboot