Raspberry Pi A User Manual page 120

104
P A R T I
C O N N E C T I N G T H E B O A R D
Choosing an uneven value, such as 17MB, will not harm the Pi but may result in a different
value being used than the one selected.
When you have chosen a memory split, press the Enter key to confirm. To apply the setting,
exit by pressing the Right arrow key twice followed by Enter, and then press
raspi-config
Enter again to confirm that you want the Pi to reboot.
A4 SSH
The Secure Shell, also known as SSH, is a way of accessing the Raspberry Pi's terminal over the
network. It's most commonly used when running the Pi as a standalone server, as it doesn't
require you to have a keyboard or monitor attached. SSH allows the user to access the text-
based terminal, and also to transfer files to or from the Pi.
Some users may wish to improve the security of their Pi by turning this feature off. Highlight
the SSH option using the cursor keys and press the Enter key. In the window that appears,
choose either Enable or Disable to turn SSH on or off. Even if you don't need it, it's a good
idea to keep SSH enabled for future troubleshooting; a better way of improving security is to
ensure that you have changed the password for the pi user.
A5 Update
The Update menu option ensures that you are running the very latest version of
raspi-
. The tool is updated frequently as new features are enabled on the Pi or different
config
settings added to the menu, so it's always a good idea to ensure that your version is up
to date.
Choosing this menu option with the cursor keys and pressing Enter will begin the update
process. This requires an Internet connection to complete, so if you are using a Raspberry Pi
Model A you will need to connect a USB network adapter to continue.
Note that this option will only update , not any other aspect of the system.
raspi-config
To update everything, including , see the instructions in Chapter 3, "Linux
raspi-config
System Administration".
When the update has completed, exit by pressing the Right arrow key twice
raspi-config
followed by the Enter key.