If you need to restart the main computer
1. Computer will load
2. Once you see the purple screen with many different listings, use the keypad to select the following kernel: Ubuntu with Linux 2.6.32-67-server (on /dev/sdi) Not recovery mode
If you need to stop a python program, follow these steps.
1. Press Ctrl, Alt, Tab to open a screen showing all open programs.
2. Click on the python program you want to close.
3. Click the "x" to close the program. This might not work the first time; make sure that your cursor is right over the "x"
If this doesn't work, start task manager by pressing Ctrl Alt Del and close python from the task manager window.