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Home > Cloud & Networking > Shell Scripting > Enterprise PowerShell Scripting Bootcamp
Enterprise PowerShell Scripting Bootcamp
Enterprise PowerShell Scripting Bootcamp

Enterprise PowerShell Scripting Bootcamp: The fastest way to learn PowerShell scripting

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Profile Icon Brenton J.W. Blawat
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eBook May 2017 238 pages 1st Edition
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Enterprise PowerShell Scripting Bootcamp

Chapter 1. Getting Started with Enterprise PowerShell Scripting

The PowerShell language was developed to provide engineers with a method to quickly automate the provisioning and management of environments. In the last decade, PowerShell's use has greatly expanded, to encompass the setup and configuration of a myriad of hardware and software systems. Since third-party manufacturers are creating PowerShell modules to control their systems, PowerShell is becoming the automation language of choice. It is being used to configure multiple systems from multiple manufacturers, with a single set of PowerShell code.

Creating scripts for enterprise environments requires a robust scripting framework. A scripting framework consists of reusable code that you can leverage for a large majority of your scripts. This framework needs to be efficient, reliable, and secure. It must also provide logging capabilities, leverage answer files, and be flexible for execution on a wide variety of systems.

As you are exploring this book, you will learn a large number of tested and industry-proven scripting techniques. The examples you create will be applied at the end of the book in a Windows server scanning script. This will enable you to quickly integrate new sections of code into your own scripts, and will provide a trusted platform you can confidently deploy in your environment.

In this chapter, you will:

  • Learn about the Windows server scanning script created throughout this book
  • Explore performance optimizations implemented throughout each chapter
  • Review different components you should include in all of your PowerShell scripts

Windows server scanning script

There can be times in large enterprises where you need to determine the functionality of systems. If you don't have large asset management software, you will need the ability to perform a discovery. This book was designed to provide a significant jumpstart for the creation of a Windows server scanning script. The script takes into consideration the limitations of Windows components and provides extremely detailed information about systems.

Some of the items that you will be scanning for include:

  • Disk configuration: You will be able to query the disk layout for a particular system and determine device type, drive letters, free space, and total disk size.
  • Scheduled task scanning: You will discover the scheduled tasks that are not running as built-in accounts, providing visibility into non-standard configurations.
  • Windows processes: You will identify the Windows processes on the system to determine what processes are running with alternate user credentials. This will help identify systems that have service accounts for process execution.
  • Windows services: You will review the Windows services on the system to discover what services are not running as built-in accounts. This will further identify service account usage in your enterprise.
  • Installed software: You will learn how to safely scan a system for software to identify software titles installed on a system.
  • User profiles: You will evaluate all of the user profiles created on a system to determine the last login usernames and times. This will help identify teams that own the management of the servers.
  • Windows features: You will determine the installed Windows features and roles on a system to help identify what role the server has in your enterprise.
  • Scanning files: You will scan individual files on a system for strings. This provides the ability to identify items such as user credentials and configured server names.

This script is designed to provide a robust platform to scan your enterprise. Variations of this script have been used in multiple Fortune 500 companies and executed on well over 10,000 systems. The chapters in this book have been designed to enable you to quickly learn the core components to integrate this PowerShell tool into your personal repository.

Performance considerations

This book dives into important performance considerations for your scripts. Since PowerShell is an extremely flexible language, you can complete the same activity in multiple ways. While both sets of code get the script to create the same results, there are ways to optimize your code to make it much more efficient. This becomes increasingly important as you evaluate large amounts of data.

Execution time for file scanning, for example, exponentially grows with the quantity of files and the file sizes. 100 files with 100 lines of code can quickly create 10,000 evaluations. Now, if you scale that to 6 million files in a storage volume times 100 lines of code, you are performing 600 million evaluations. Small code performance improvements can significantly optimize your scanning of scripts at scale.

Some of the performance considerations include:

  • Measuring commands: You will evaluate a technique to measure the execution time for commands.
  • Cmdlet considerations: You will learn which cmdlets are more efficient than others and how to avoid common cmdlet mistakes.
  • Regular expressions over arrays: Regular expressions can be difficult to learn, but they provide significant performance improvements to your scripts. You will learn how to properly implement dynamic regular expressions in your scripts.
  • Switch statements: You will evaluate how to perform data sorting with switches and why switch statements are significantly faster.

PowerShell scripting templates

As you develop different scripts for your enterprise environment, you will have a core set of functions that you tend to use in all of your scripts. Some enterprise scripters create their own functions, while others leverage scripts from the vast community of PowerShell developers. With either method, you will need a solid foundation to build your scripts on.

Some of the most common items this book provides for scripting templates include:

  • Encryption and decryption technologies: Probably the most common requirement in enterprise environments is security. It's no secret that you should not have clear text administrative-level credentials in scripts. Providing an encryption and decryption function in your scripts is essential to maintaining a secure enterprise.
  • Logging mechanisms: The second most common requirement in enterprise environments is logging script actions. Since scripts are typically executed on a large number of systems at the same time, you will need the ability to track exactly what is being performed on these systems. Creating a logging function will provide the ability to log script actions to both the event log and a log file.
  • Answer file logic: One of the more advanced methods for PowerShell scripting is leveraging an answer file for script variables. The core to the answer file is that you can add, remove, and modify the values in the answer file without having to modify your script. This provides the ability to have flexibility in your scripts without needing to touch any lines of code.
  • Standardized comment blocks: When you are creating scripts, it's essential to give yourself and others reminders of what the script's function is. Comment blocks enable the ability to provide details about the script, revision history, and execution parameters of the script.

Whether you are new to PowerShell scripting or you have been scripting for a long time, this book provides thought-inspiring methods to improve your scripting abilities. As you work through this book, it's strongly encouraged to incorporate these examples in your own scripts. This applied learning methodology will significantly help in your retention of the content, and provide a very robust enterprise scripting platform.

Summary

In this chapter, you explored the different components that will be implemented in the Windows server scanning script. You continued to learn about the different performance optimizations that you will be implementing in the book. Finally, you reviewed the individual components that should be included in most of your PowerShell Scripts.

In the next chapter, you will begin your journey by learning script structure, comment blocks, and script logging techniques.

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Key benefits

  • Introduces industry-proven techniques that improve script efficiency and reliability
  • Example-rich guide based on real-world scenarios
  • Facilitates building a script that can fully scan a Windows server and identify components

Description

Enterprise PowerShell Scripting Bootcamp explains how to create your own repeatable PowerShell scripting framework. This framework contains script logging methodologies, answer file interactions, and string encryption and decryption strategies. This book focuses on evaluating individual components to identify the system’s function, role, and unique characteristics. To do this, you will leverage built-in CMDlets and Windows Management Instrumentation (WMI) to explore Windows services, Windows processes, Windows features, scheduled tasks, and disk statistics. You will also create custom functions to perform a deep search for specific strings in files and evaluate installed software through executable properties. We will then discuss different scripting techniques to improve the efficiency of scripts. By leveraging several small changes to your code, you can increase the execution performance by over 130%. By the end of this book, you will be able to tie all of the concepts together in a PowerShell-based Windows server scanning script. This discovery script will be able to scan a Windows server to identify a multitude of components.

Who is this book for?

This book is for IT professionals and Windows administrators who would like to gain intensive, hands-on knowledge and skills on PowerShell without spending hours and hours in learning. If you have been struggling to find the time to gain proficiency and confidence with PowerShell and everyday scripting tasks

What you will learn

  • Create an advanced PowerShell scripting template that provides repeatable code to jumpstart all of your scripting projects
  • Learn how to securely encrypt and store usernames, passwords, and other sensitive data in PowerShell scripts and answer files
  • Understand how to optimize the performance of scripts to help process large datasets quickly and avoid time-consuming mistakes
  • Develop a script to scan for non-standard Windows Server configurations and identify
  • service accounts used on Windows Servers
  • Gather a large list of data from a Windows server without locally or remotely logging in
  • interactively

Product Details

Country selected
Publication date, Length, Edition, Language, ISBN-13
Publication date : May 18, 2017
Length: 238 pages
Edition : 1st
Language : English
ISBN-13 : 9781787281158
Vendor :
Microsoft
Category :
Cloud & Networking
Concepts :
Shell Scripting
Tools :
Windows Server

What do you get with eBook?

Product feature icon Instant access to your Digital eBook purchase
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want

Product Details

Publication date : May 18, 2017
Length: 238 pages
Edition : 1st
Language : English
ISBN-13 : 9781787281158
Vendor :
Microsoft
Category :
Cloud & Networking
Concepts :
Shell Scripting
Tools :
Windows Server

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Frequently bought together

Mastering Windows PowerShell Scripting (Second Edition)
Mastering Windows PowerShell Scripting (Second Edition)
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Enterprise PowerShell Scripting Bootcamp
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Table of Contents

14 Chapters
1. Getting Started with Enterprise PowerShell Scripting Chevron down icon Chevron up icon
1. Getting Started with Enterprise PowerShell Scripting
Windows server scanning script
Performance considerations
PowerShell scripting templates
Summary
2. Script Structure, Comment Blocks, and Script Logging Chevron down icon Chevron up icon
2. Script Structure, Comment Blocks, and Script Logging
Overall script structure
Comment blocks
Script logging
Summary
3. Working with Answer Files Chevron down icon Chevron up icon
3. Working with Answer Files
Answer files
Summary
4. String Encryption and Decryption Chevron down icon Chevron up icon
4. String Encryption and Decryption
RijndaelManaged encryption
Encrypting and decrypting strings
Summary
5. Interacting with Services, Processes, Profiles, and Logged on Users Chevron down icon Chevron up icon
5. Interacting with Services, Processes, Profiles, and Logged on Users
Windows services
Managing Windows processes
Identifying logged on users
User profiles
Summary
6. Evaluating Scheduled Tasks Chevron down icon Chevron up icon
6. Evaluating Scheduled Tasks
Scheduled tasks
Identifying scheduled tasks running as alternate users
Summary
7. Determining Disk Statistics Chevron down icon Chevron up icon
7. Determining Disk Statistics
Disk statistics
Disk information script
Summary
8. Windows Features and Installed Software Detection Chevron down icon Chevron up icon
8. Windows Features and Installed Software Detection
Windows features
Installed software detection
Summary
9. File Scanning Chevron down icon Chevron up icon
9. File Scanning
File scanning
Excluding long paths
Excluding files
Summary
10. Optimizing Script Execution Speed Chevron down icon Chevron up icon
10. Optimizing Script Execution Speed
Script execution speed
Summary
11. Improving Performance by Using Regular Expressions Chevron down icon Chevron up icon
11. Improving Performance by Using Regular Expressions
Using regular expressions
Dynamically building expressions
Implementating regular expression performance
Summary
12. Overall Script Workflow, Termination Files, and Merging Data Results Chevron down icon Chevron up icon
12. Overall Script Workflow, Termination Files, and Merging Data Results
Windows server scanning script overview
Pre-script security
XML answer file creation
PowerShell script 3 - the termination files
PowerShell script 4 - merging the scanning script result data
Summary
13. Creating the Windows Server Scanning Script and Post-Execution Cleanup Chevron down icon Chevron up icon
13. Creating the Windows Server Scanning Script and Post-Execution Cleanup
Windows server scanning script creation
Creating a termination function
Multiple Windows server scanning script functions
Running the script
Performing script cleanup
Summary
Index Chevron down icon Chevron up icon
Index

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The author is interesting and insightful. Makes PowerShell as easy as peanut butter!
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I'm a big fan of several of the authors over at Packtpub. Plus this book and it's format allowed me to truly excel in my PowerShell scripting.
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First time purchasing a hardcopy book from Packt - Bought it from Amazon like many other tech books in the past. This publisher has made downloading the example code difficult unless you buy direct from them. The book says they will send you the example code if you register on their site and then send an email requesting it. Created an account on Packtpub and found the book that I bought but no way to download the code and no instructions or support email to request it. Too time consuming and too hard. Next time, it will be easier to do an Amazon one-button-click on a different publisher.
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About the author

Profile icon Brenton J.W. Blawat
Brenton J.W. Blawat
Brenton J.W. Blawat is an entrepreneur, strategic technical advisor, author, and enterprise architect, who has a passion for the procurement of technology in profit-based organizations. He is business-centric and technology-minded. Brenton has many years of experience in bridging the gap between technical staff and decision-makers in several organizations. He takes pride in his ability to effectively communicate with a diverse audience and provide strategic direction for large and small organizations alike._x000D_ In 2013, Brenton authored his first book, PowerShell 3.0 WMI Starter, Packt Publishing. In March 2015, he authored his second book Mastering Windows PowerShell Scripting, Packt Publishing._x000D_ Brenton currently works at CDW as an Enterprise Architect in strategic solutions and services. CDW is a leading multibrand technology solutions provider in the fields of business, government, education, and healthcare. A Fortune 500 company, it was founded in 1984 and employs approximately 7,200 coworkers. In 2016, the company generated net sales of more than $13.0 billion._x000D_ His current specialisation sits on top of 15 years experience spread across (predominantly Microsoft) systems, (Juniper and Cisco) networking, and security.
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