Book Image

Raspberry Pi Zero Cookbook

Book Image

Raspberry Pi Zero Cookbook

Overview of this book

The Raspberry Pi Zero, one of the most inexpensive, fully-functional computers available, is a powerful and revolutionary product developed by the Raspberry Pi Foundation. The Raspberry Pi Zero opens up a new world for the makers out there. This book will give you expertise with the Raspberry Pi Zero, providing all the necessary recipes that will get you up and running. In this book, you will learn how to prepare your own circuits rather than buying the expensive add–ons available in the market. We start by showing you how to set up and manage the Pi Zero and then move on to configuring the hardware, running it with Linux, and programming it with Python scripts. Later, we integrate the Raspberry Pi Zero with sensors, motors, and other hardware. You will also get hands-on with interesting projects in media centers, IoT, and more.
Table of Contents (17 chapters)
Raspberry Pi Zero Cookbook
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Changing to root and using superpowers


We've touched upon sudo briefly and used it in some recipes, and now it is time to cover this essential command more deeply. There are also ways to become the root user and run whatever you want without having to prefix everything with sudo.

Getting ready

Stay in your terminal!

How to do it...

  1. Any time someone needs elevated permissions to do something, such as installing a program or changing another user's password, if they have the appropriate permissions, they may use sudo to execute such commands. We've used apt-get several times, and if you forgot to use sudo, you will recognize these messages:

    pi@rpz14101:~/share/ch3 $ apt-get install postgresql
    
    E: Could not open lock file /var/lib/dpkg/lock - open 
       (13: Permission denied)
    E: Unable to lock the administration directory 
       (/var/lib/dpkg/), are you root?
    

  2. Running the command again with sudo will sort out the issue. Instead of retyping the entire command, you can also use this trick...