Getting Started with the Raspberry Pi - Raspberry Pi User Guide - page 23

required for the Pi to work properly. Connect the micro-USB power supply only when you are
ready to start using the Pi. With no power button on the device, it will start working the
instant power is connected.
To safely turn the Raspberry Pi off, issue a shutdown command at the console or terminal by
typing:
sudo shutdown -h now
For more information on using the terminal, see Chapter 3, “Linux System Administration”.
If you have prepared or purchased your SD card with the NOOBS tool, as described earlier in this
chapter, the Pi will load this tool and wait for your instructions; if not, powering the Pi on with a
blank SD card will result in a blank screen or a coloured test pattern. In this case, switch off the
power and remove the SD card before following the manual installation instructions from the
following section, “Installing the Operating System”.
Installing the Operating System
If you purchased your Raspberry Pi with a bundled SD card featuring a preloaded operating
system, or followed the instructions for installing NOOBS earlier in this chapter, you can
simply insert the card into the SD card slot on the underside of the Pi. If you bought the Pi by
itself, you will need to install an operating system on the SD card before the Pi is ready
to use.
Installing Using NOOBS
If you have installed NOOBS on your SD card, or purchased an SD card with NOOBS pre-
installed, powering on the Raspberry Pi will display a menu (see Figure 2-8). This menu pro-
vides a list of operating systems suitable for the Pi, any one (or more) of which can be
installed. You can also choose to change the interface language by clicking the arrow next to
Language at the bottom of the screen, or choose a different keyboard layout using the arrow
next to Keyboard.
If this is your first time running NOOBS on that SD card, there will be a delay while the SD
card's partition is resized to make room for your chosen operating system; do not unplug the
Pi's power while this is in progress, as you will risk damaging your SD card.