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You're reading from Linux Shell Scripting Cookbook Do amazing things with the shell and automate tedious tasks

Product type Paperback

Published in May 2017

Publisher

ISBN-13 9781785881985

Length 552 pages

Edition 3rd Edition

Tools

Linux

Concepts

Shell Scripting

Authors (3):

Clif Flynt

Sarath Lakshman

Shantanu Tushar

View More author details

Table of Contents (20) Chapters

Title Page

Credits

About the Authors

About the Reviewer

www.PacktPub.com

Customer Feedback

Preface

1. Shell Something Out FREE CHAPTER

2. Have a Good Command

3. File In, File Out

4. Texting and Driving

5. Tangled Web? Not At All!

6. Repository Management

7. The Backup Plan

8. The Old-Boy Network

9. Put On the Monitors Cap

10. Administration Calls

11. Tracing the Clues

12. Tuning a Linux System

13. Containers, Virtual Machines, and the Cloud

Measuring and optimizing power usage

Battery capacity is a critical resource on mobile devices, such as notebook computers and tablets. Linux provides tools that measure power consumption, one such command is powertop.

Getting ready

The powertop application doesn't come preinstalled with many Linux distributions, you will have to install it using your package manager.

How to do it...

The powertop application measures per-module power consumption and supports interactively optimizing power consumption:

With no options, powertop presents a display on the terminal:

# powertop

The powertop command takes measurements and displays detailed information about power usage, the processes using the most power, and so on:

PowerTOP 2.3  Overview  Idle stats  Frequency stats  Device stats  Tunable

Summary: 1146.1 wakeups/sec,  0.0 GPU ops/secs, 0.0 VFS ops/sec and 73.0% C

Usage Events/s Category Description
407.4 ms/s 258.7 Process /usr/lib/vmware/bin/vmware
64.8 ms/s 313.8 Process /usr/lib64/firefox/firefox...