This section explains how to change the default password on the Raspberry Pi. It is a good security practice to change the default password that is configured during the Installing Mainsail section. By default the Raspberry Pi password is raspberry.
From the Raspberry Pi Software Configuration Tool menu;
Select System Options and press Enter;
Use the arrow keys on your keyboard to navigate the Raspberry Pi Software Configuration Tool menus and use Enter key to select.
Raspberry Pi Software Configuration Tool - Main Menu
Select S3 Password and press Enter;
S3 Password
You should get this message 'You will now be asked to enter a new password for the pi user';
Press Enter to continue;
You will be prompted to enter a 'New password';
Type your new password and press Enter;
You will be prompted to 'Retype new password';
Retype your new password and press Enter;
New Password
If you successful entered your new password, you will receive a message saying 'Password changed successfully';
Click <Ok>;
Password Ok
After clicking <Ok> above, it should return you to the Raspberry Pi Software Configuration Tool main menu. If it closes the Configuration Tool, type sudo raspi-config and when prompted enter your new password.