Wicked Cool Shell Scripts by Taylor, Dave -- Read -- Imperial Library of Trantor

Index

Cover Page Title Page Copyright Page About the Authors About the Technical Reviewer Brief Contents Contents in Detail Acknowledgments for the First Edition Acknowledgments for the Second Edition Introduction

What to Take Away This Book Is for You If . . . Organization of This Book Finally . . .

Chapter 0: A Shell Scripts Crash Course

What Is a Shell Script, Anyway? Running Commands Configuring Your Login Script Running Shell Scripts Making Shell Scripts More Intuitive Why Shell Scripts? Let’s Get Cracking

Chapter 1: The Missing Code Library

What Is POSIX? #1 Finding Programs in the PATH

The Code How It Works Running the Script The Results Hacking the Script

#2 Validating Input: Alphanumeric Only

The Code How It Works Running the Script The Results Hacking the Script

#3 Normalizing Date Formats

The Code How It Works Running the Script The Results Hacking the Script

#4 Presenting Large Numbers Attractively

The Code How It Works Running the Script The Results Hacking the Script

#5 Validating Integer Input

The Code How It Works Running the Script The Results Hacking the Script

#6 Validating Floating-Point Input

The Code How It Works Running the Script The Results Hacking the Script

#7 Validating Date Formats

The Code How It Works Running the Script The Results Hacking the Script

#8 Sidestepping Poor echo Implementations

The Code Running the Script The Results Hacking the Script

#9 An Arbitrary-Precision Floating-Point Calculator

The Code How It Works Running the Script The Results

#10 Locking Files

The Code How It Works Running the Script The Results Hacking the Script

#11 ANSI Color Sequences

The Code How It Works Running the Script The Results Hacking the Script

#12 Building a Shell Script Library

The Code How It Works Running the Script The Results

#13 Debugging Shell Scripts

The Code How It Works Running the Script The Results Hacking the Script

Chapter 2: Improving on User Commands

#14 Formatting Long Lines

The Code How It Works Running the Script The Results

#15 Backing Up Files as They’re Removed

The Code How It Works Running the Script The Results Hacking the Script

#16 Working with the Removed File Archive

The Code How It Works Running the Script The Results Hacking the Script

#17 Logging File Removals

The Code How It Works Running the Script The Results Hacking the Script

#18 Displaying the Contents of Directories

The Code How It Works Running the Script The Results Hacking the Script

#19 Locating Files by Filename

The Code How It Works Running the Script The Results Hacking the Script

#20 Emulating Other Environments: MS-DOS

The Code How It Works Running the Script The Results Hacking the Script

#21 Displaying Time in Different Time Zones

The Code How It Works Running the Script The Results Hacking the Script

Chapter 3: Creating Utilities

#22 A Reminder Utility

The Code How It Works Running the Script The Results Hacking the Script

#23 An Interactive Calculator

The Code How It Works Running the Script The Results Hacking the Script

#24 Converting Temperatures

The Code How It Works Running the Script The Results Hacking the Script

#25 Calculating Loan Payments

The Code How It Works Running the Script The Results Hacking the Script

#26 Keeping Track of Events

The Code How It Works Running the Script The Results Hacking the Script

Chapter 4: Tweaking Unix

#27 Displaying a File with Line Numbers

The Code How It Works Running the Script The Results Hacking the Script

#28 Wrapping Only Long Lines

The Code How It Works Running the Script The Results

#29 Displaying a File with Additional Information

The Code How It Works Running the Script The Results

#30 Emulating GNU-Style Flags with quota

The Code How It Works Running the Script The Results

#31 Making sftp Look More Like ftp

The Code How It Works Running the Script The Results Hacking the Script

#32 Fixing grep

The Code How It Works Running the Script The Results Hacking the Script

#33 Working with Compressed Files

The Code How It Works Running the Script The Results Hacking the Script

#34 Ensuring Maximally Compressed Files

The Code How It Works Running the Script The Results

Chapter 5: System Administration: Managing Users

#35 Analyzing Disk Usage

The Code How It Works Running the Script The Results Hacking the Script

#36 Reporting Disk Hogs

The Code How It Works Running the Script The Results Hacking the Script

#37 Improving the Readability of df Output

The Code How It Works Running the Script The Results Hacking the Script

#38 Figuring Out Available Disk Space

The Code How It Works Running the Script The Results Hacking the Script

#39 Implementing a Secure locate

The Code How It Works Running the Script The Results Hacking the Script

#40 Adding Users to the System

The Code How It Works Running the Script The Results Hacking the Script

#41 Suspending a User Account

The Code How It Works Running the Script The Results

#42 Deleting a User Account

The Code How It Works Running the Script The Results Hacking the Script

#43 Validating the User Environment

The Code How It Works Running the Script The Results

#44 Cleaning Up After Guests Leave

The Code How It Works Running the Script The Results

Chapter 6: System Administration: System Maintenance

#45 Tracking Set User ID Applications

The Code How It Works Running the Script The Results

#46 Setting the System Date

The Code How It Works Running the Script The Results

#47 Killing Processes by Name

The Code How It Works Running the Script The Results Hacking the Script

#48 Validating User crontab Entries

The Code How It Works Running the Script The Results Hacking the Script

#49 Ensuring that System cron Jobs Are Run

The Code How It Works Running the Script The Results Hacking the Script

#50 Rotating Log Files

The Code How It Works Running the Script The Results Hacking the Script

#51 Managing Backups

The Code How It Works Running the Script The Results

#52 Backing Up Directories

The Code How It Works Running the Script The Results

Chapter 7: Web and Internet Users

#53 Downloading Files via FTP

The Code How It Works Running the Script The Results Hacking the Script

#54 Extracting URLs from a Web Page

The Code How It Works Running the Script The Results Hacking the Script

#55 Getting GitHub User Information

The Code How It Works Running the Script The Results Hacking the Script

#56 ZIP Code Lookup

The Code How It Works Running the Script The Results Hacking the Script

#57 Area Code Lookup

The Code How It Works Running the Script The Results Hacking the Script

#58 Keeping Track of the Weather

The Code How It Works Running the Script The Results Hacking the Script

#59 Digging Up Movie Info from IMDb

The Code How It Works Running the Script The Results Hacking the Script

#60 Calculating Currency Values

The Code How It Works Running the Script The Results Hacking the Script

#61 Retrieving Bitcoin Address Information

The Code How It Works Running the Script The Results Hacking the Script

#62 Tracking Changes on Web Pages

The Code How It Works Running the Script The Results Hacking the Script

Chapter 8: Webmaster Hacks

Running the Scripts in This Chapter #63 Seeing the CGI Environment

The Code How It Works Running the Script The Results

#64 Logging Web Events

The Code How It Works Running the Script The Results Hacking the Script

#65 Building Web Pages on the Fly

The Code How It Works Running the Script The Results Hacking the Script

#66 Turning Web Pages into Email Messages

The Code How It Works Running the Script The Results Hacking the Script

#67 Creating a Web-Based Photo Album

The Code How It Works Running the Script The Results Hacking the Script

#68 Displaying Random Text

The Code How It Works Running the Script The Results Hacking the Script

Chapter 9: Web and Internet Administration

#69 Identifying Broken Internal Links

The Code How It Works Running the Script The Results Hacking the Script

#70 Reporting Broken External Links

The Code How It Works Running the Script The Results

#71 Managing Apache Passwords

The Code How It Works Running the Script The Results Hacking the Script

#72 Syncing Files with SFTP

The Code How It Works Running the Script The Results Hacking the Script

Chapter 10: Internet Server Administration

#73 Exploring the Apache access_log

The Code How It Works Running the Script The Results Hacking the Script

#74 Understanding Search Engine Traffic

The Code How It Works Running the Script The Results Hacking the Script

#75 Exploring the Apache error_log

The Code How It Works Running the Script The Results

#76 Avoiding Disaster with a Remote Archive

The Code How It Works Running the Script The Results Hacking the Script

#77 Monitoring Network Status

The Code How It Works Running the Script The Results Hacking the Script

#78 Renicing Tasks by Process Name

The Code How It Works Running the Script The Results Hacking the Script

Chapter 11: OS X Scripts

#79 Automating screencapture

The Code How It Works Running the Script The Results Hacking the Script

#80 Setting the Terminal Title Dynamically

The Code How It Works Running the Script The Results Hacking the Script

#81 Producing Summary Listings of iTunes Libraries

The Code How It Works Running the Script The Results Hacking the Script

#82 Fixing the open Command

The Code How It Works Running the Script The Results Hacking the Script

Chapter 12: Shell Script Fun and Games

#83 Unscramble: A Word Game

The Code How It Works Running the Script The Results Hacking the Script

#84 Hangman: Guess the Word Before It’s Too Late

The Code How It Works Running the Script The Results Hacking the Script

#85 A State Capitals Quiz

The Code How It Works Running the Script The Results Hacking the Script

#86 Is That Number a Prime?

The Code How It Works Running the Script The Results Hacking the Script

#87 Let’s Roll Some Dice

The Code How It Works Running the Script Hacking the Script

#88 Acey Deucey

The Code How It Works Running the Script The Results Hacking the Script

Chapter 13: Working with the Cloud

#89 Keeping Dropbox Running

The Code How It Works Running the Script The Results Hacking the Script

#90 Syncing Dropbox

The Code How It Works Running the Script The Results Hacking the Script

#91 Creating Slide Shows from Cloud Photo Streams

The Code How It Works Running the Script The Results Hacking the Script

#92 Syncing Files with Google Drive

The Code How It Works Running the Script The Results Hacking the Script

#93 The Computer Says . . .

The Code How It Works Running the Script The Results Hacking the Script

Chapter 14: Imagemagick and Working with Graphics Files

#94 A Smarter Image Size Analyzer

The Code How It Works Running the Script The Results Hacking the Script

#95 Watermarking Images

The Code How It Works Running the Script The Results Hacking the Script

#96 Framing Images

The Code How It Works Running the Script The Results Hacking the Script

#97 Creating Image Thumbnails

The Code How It Works Running the Script The Results Hacking the Script

#98 Interpreting GPS Geolocation Information

The Code How It Works Running the Script The Results Hacking the Script

Chapter 15: Days and Dates

#99 Finding the Day of a Specific Date in the Past

The Code How It Works Running the Script Hacking the Script

#100 Calculating Days Between Dates

The Code How It Works Running the Script Hacking the Script

#101 Calculating Days Until a Specified Date

The Code How It Works Running the Script Hacking the Script

Appendix A: Installing Bash on Windows 10

Turning On Developer Mode Installing Bash Microsoft’s Bash Shell vs. a Linux Distro

Appendix B: Bonus Scripts

#102 Bulk-Renaming Files

The Code How It Works Running the Script The Results Hacking the Script

#103 Bulk-Running Commands on Multiprocessor Machines

The Code How It Works Running the Script The Results Hacking the Script

#104 Finding the Phase of the Moon

The Code How It Works Running the Script The Results Hacking the Script

Index Resources 101 Time-Saving, Problem-Solving Shell Scripts Footnote

Chapter 5: System Administr Ation: Managing Users

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