All Raspberry Pis come with the default username pi, which should be changed to make it more secure. We create a new user and assign it all rights, and then delete the pi user.

To add a new user, run the sudo adduser adminuser command in the terminal. It will prompt for a password; provide it, and you are done, as shown in Figure 10.6:

Now, we will add our newly created user to the sudo group so that it has all the root-level permissions, as shown in Figure 10.7:

Now, we can delete the default user, pi, by running the sudo deluser pi command. This will delete the user, but its repository folder /home/pi will still be there. If required, you can delete that as well.