The Raspberry Pi powers on when 5 volts of power is applied to the micro-USB port. There is no power switch for the Raspberry Pi. The Raspberry Pi receives power though the micro-USB jack next to the HDMI port. It is best to power the Raspberry Pi with a power supply that is capable of providing more than two amps. External USB devices (i.e. external hard drives) are best powered through a USB hub with its own power source rather than being powered through the Raspberry Pi. The Raspberry Pi will show the executed processes when starting up. Once complete the computer will await a command at a command prompt. The GUI will allow users to interface with the computer with a mouse and keyboard. Users can execute a Graphical User Interface (GUI) with the following command:

startx

Sometimes it may be necessary to restart the computer in order to complete updates or when the system may freeze. It is imperative that the computer is able to conduct a graceful shutdown. Resist the urge to simply disconnect power in order to restart or power down the computer. The command to restart the Raspberry Pi from the command prompt is:

sudo shutdown -r now

To power down the Raspberry Pi completely, issue the command to halt and shutdown from the command prompt:

sudo shutdown -Hp now

The power cord will need to be disconnected and reattached in order to restart the Raspberry Pi again.

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