A keyboard layout is the mapping of a physical key to a character on a keyboard
US International keyboard layout
The keyboard layout is specified in your operating system.
Example where I have deleted all Ctrl+Alt / Alt+Ctrl (AltGr) character binding.
To bind key on Linux console, the configuration file inputrc is used.
If you have problem with arrows up/down (ie you see the cryptic ASCII-ESC H or ASCII-ESC M sequences in place of the history), check this file first.
See also: