Well the most easiest way to shut down any computer is by pulling the plug or to switch it off directly. As with most of the PCs they can be switched off forcibly even when the system has crashed by holding the power switch for 3 secs. But this method isn't quite healthy for your system as it can damage the HDD or BIOS. For the Raspberry Pi, it can cause problems or corrupt the SD card.
So now let’s talk about how to shut down your Raspberry Pi when it hasn't frozen.
sudo shutdown -h now (or sudo halt) [
-hmeans halt the system] [now means to shutdown immediately]
You can also use the shorthand's:- `halt` and `reboot`.
As with all computers, your Raspberry Pi requires a boot-loader and a suitable Operating System to boot. Some Raspberry Pi's comes with pre-installed SD card, but if you didn't receive one you will need to prepare your own.
You can use the BerryBoot installer if your Pi is connected to the Internet.A small zip file containing the BerryBoot system files is required to be extracted to an empty SD card .Then boot up your Pi with the SD card inserted and follow the on-screen prompts to complete the installation. BerryBoot allows you to install more than one Operating System.
To prepare your SD card you have to download the SD image (the data you will write to the card) from a mirror or a torrent . It is recommended that you verify the image with the SHA-1 checksum provided in the download page. After successfully downloading the image extract the image file to a folder of your choice.Now insert the SD card and note the drive letter assigned.Format the SD card to avoid any troubles.You will need an utility (Win32ImageWriter) to make your SD card bootable. Locate the image file that you have extracted and select the drive letter in device box of Win32DiskImager .
Then you need to hit on 'Write' followed by ‘Yes’ when confirmation box appears . The burn process takes around 3 minutes and upon completion you will get a pop up ‘Write Successful’. Now remove the SD card from your computer put it in your Raspberry Pi .You can expand the partitions using configure script to use all of the SD card if you have used SD card of capacity greater than 4 G.B.