When you log in, your Raspberry Pi will warn you that having SSH enabled with the default username and password isn't very secure, and it's absolutely right! The first step is to change our password.

In order to do so, in your SSH window, type in passwd and hit Enter. You'll be prompted for your current password (raspberry) and a new password. Type in whatever you like (just don't forget it)! You'll be asked to confirm it, and voila! The new password is set, as shown in the following screenshot. Your Raspberry Pi will be much more secure: