Book Image

Mastering Windows PowerShell Scripting (Second Edition) - Second Edition

By : Brenton J.W. Blawat
Book Image

Mastering Windows PowerShell Scripting (Second Edition) - Second Edition

By: Brenton J.W. Blawat

Overview of this book

PowerShell scripts offer a handy way to automate various chores. Working with these scripts effectively can be a difficult task. This comprehensive guide starts from scratch and covers advanced-level topics to make you a PowerShell expert. The first module, PowerShell Fundamentals, begins with new features, installing PowerShell on Linux, working with parameters and objects, and also how you can work with .NET classes from within PowerShell. In the next module, you’ll see how to efficiently manage large amounts of data and interact with other services using PowerShell. You’ll be able to make the most of PowerShell’s powerful automation feature, where you will have different methods to parse and manipulate data, regular expressions, and WMI. After automation, you will enter the Extending PowerShell module, which covers topics such as asynchronous processing and, creating modules. The final step is to secure your PowerShell, so you will land in the last module, Securing and Debugging PowerShell, which covers PowerShell execution policies, error handling techniques, and testing. By the end of the book, you will be an expert in using the PowerShell language.
Table of Contents (24 chapters)
Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Number manipulation


Basic mathematical operation in PowerShell makes use of the operators discussed in Chapter 5, Operators.

Formatting numbers using the format operators are introduced along with a number of features:

'{0:x}' -f 24244      # Lower-case hexadecimal. Returns 5eb4 
'{0:X}' -f 24244      # Upper-case hexadecimal. Returns 5EB4 
'{0:P}' -f 0.28232    # Percentage. Returns 28.23% 
'{0:N2}' -f 32583.122 # Culture specific number format. 
                      # 2 decimal places. 
                      # Returns 32,583.12 (for en-GB) 

The format operator is powerful, but it has one major shortcoming: It returns a string. It is great for when you want to display a number to a user, but will prevent sorting or work with the numeric form.

Large byte values

PowerShell provides operators for working with bytes. These operators are as follows:

  • nKB: Kilobytes (n * 10241)
  • nMB: Megabytes (n * 10242)
  • nGB: Gigabytes (n * 10243)
  • nTB: Terabytes (n * 10244)
  • nPB: Petabytes (n * 10245)

These operators can...