4. Useful Utilities and Hints for Raspberry Pi


Screen Shot

If you don’t have the screen shot utility in Accessories > Screen Shot, run this command:

sudo apt-get install gnome-utils

Run the app to capture the screen or an app window. Save to the pi folder

Terminal Program

Useful application to test serial com ports, i.e. to test Grbl running on Arduino

sudo apt-get install minicom
minicom -b 9600 -D /dev/ttyUSB0

Use Ctrl-A and then X to exit

US keyboard mapping

The default keymapping of the pi is for UK keyboards. If you need US keymapping, you need to make the modifications outlined here.

Basically, you need to do the following

  1. Open a terminal window
  2. sudo nano /etc/default/keyboard
  3. Use the arrow keys to get to the layout section that says “gb” and edit it to say, for example, “us”
  4. Ctrl-O
  5. Enter
  6. Ctrl-X
  7. You have now saved the changes, reboot:
  8. sudo shutdown now -r

Now, instead of seeing a hyphen with a droop on the end, you will see the tilde (~) character, etc.

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