Document how to get values for the localization values

RPi-Distro · Oct 14, 2019 · 336ff21 · 336ff21
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diff --git a/README.md b/README.md
@@ -86,14 +86,25 @@ The following environment variables are supported:
 
    Default keyboard keymap.
 
+   To get the current value from a running system, run `debconf-show
+   keyboard-configuration` and look at the
+   `keyboard-configuration/xkb-keymap` value.
+
  * `KEYBOARD_LAYOUT` (Default: "English (UK)" )
 
    Default keyboard layout.
 
+   To get the current value from a running system, run `debconf-show
+   keyboard-configuration` and look at the
+   `keyboard-configuration/variant` value.
+
  * `TIMEZONE_DEFAULT` (Default: "Europe/London" )
 
    Default keyboard layout.
 
+   To get the current value from a running system, look in
+   `/etc/timezone`.
+
  * `FIRST_USER_NAME` (Default: "pi" )
 
    Username for the first user