Mastering UNIX Shell Scripting: Bash, Bourne, and Korn Shell Scripting for Programmers, System Administrators, and UNIX Gurus, Second Edition -- About the Author -- Credits -- Contents -- Acknowledgments -- Introduction -- Overview of the Book and Technology -- How This Book Is Organized -- Who Should Read this Book -- Tools You Will Need -- What's on the Web Site -- Summary -- Part I: The Basics of Shell Scripting -- Chapter 1: Scripting Quick Start and Review -- Case Sensitivity -- UNIX Special Characters -- Shells -- Shell Scripts -- Functions -- Running a Shell Script -- Comments and Style in Shell Scripts -- Control Structures -- Using break, continue, exit, and return -- Here Document -- Shell Script Commands -- Symbol Commands -- Variables -- Command-Line Arguments -- shift Command -- Special Parameters * and @ -- Double Quotes, Forward Tics, and Back Tics -- Using awk on Solaris -- Using the echo Command Correctly -- Math in a Shell Script -- Built-In Mathematical Functions -- File Permissions, suid and sgid Programs -- Running Commands on a Remote Host -- Setting Traps -- User-Information Commands -- ps Command -- Communicating with Users -- Uppercase or Lowercase Text for Easy Testing -- Check the Return Code -- Time-Based Script Execution -- Output Control -- Catching a Delayed Command Output -- Fastest Ways to Process a File Line-by-Line -- Using Command Output in a Loop -- Mail Notification Techniques -- Creating a Progress Indicator -- Working with Record Files -- Creating a Pseudo-Random Number -- Checking for Stale Disk Partitions in AIX -- Automated Host Pinging -- Highlighting Specific Text in a File -- Keeping the Printers Printing -- Automated FTP File Transfer -- Using rsync to Replicate Data -- Capturing a List of Files Larger than MEG -- Capturing a User's Keystrokes -- Using the bc Utility for Floating-Point Math.

Number Base Conversions -- Create a Menu with the select Command -- Removing Repeated Lines in a File -- Removing Blank Lines from a File -- Testing for a Null Variable -- Directly Access the Value of the Last Positional Parameter, # -- Remove the Column Headings in a Command Output -- Arrays -- Testing a String -- Summary -- Chapter 2: 24 Ways to Process a File Line-by-Line -- Command Syntax -- 24 Methods to Parse a File Line-by-Line -- Timing Each Method -- What about Using Command Input Instead of File Input? -- Summary -- Lab Assignments -- Chapter 3: Automated Event Notification -- Basics of Automating Event Notification -- Problems with Outbound Mail -- Dial-Out Modem Software -- SNMP Traps -- Summary -- Lab Assignments -- Chapter 4: Progress Indicators Using a Series of Dots, a Rotating Line, or Elapsed Time -- Indicating Progress with a Series of Dots -- Indicating Progress with a Rotating Line -- Indicating Progress with Elapsed Time -- Combining Feedback Methods -- Other Options to Consider -- Summary -- Lab Assignments -- Part II: Scripts for Programmers, Testers, and Analysts -- Chapter 5: Working with Record Files -- What Is a Record File? -- Processing the Record Files -- Tasks for Records and Record Files -- The Merge Process -- Putting It All Together -- Other Things to Consider -- Summary -- Lab Assignments -- Chapter 6: Automated FTP Stuff -- Syntax -- Automating File Transfers and Remote Directory Listings -- What about Encryption? -- Other Things to Consider -- Summary -- Lab Assignments -- Chapter 7: Using rsync to Efficiently Replicate Data -- Syntax -- Generic rsync Shell Script -- Replicating Multiple Directories with rsync -- Replicating Multiple Filesystems with rsync -- Replicating an Oracle Database with rsync -- rsync Copy Shell Script -- Summary -- Lab Assignments.

Chapter 8: Automating Interactive Programs with Expect and Autoexpect -- Downloading and Installing Expect -- The Basics of Talking to an Interactive Script or Program -- Using autoexpect to Automatically Create an Expect Script -- Working with Variables -- What about Conditional Tests? -- Using Expect Scripts with Sun Blade Chassis and JumpStart -- Summary -- Lab Assignments -- Chapter 9: Finding Large Files and Files of a Specific Type -- Syntax -- Remember That File and Directory Permissions Thing -- Don't Be Shocked by the Size of the Files -- Creating the Script -- Other Options to Consider -- Summary -- Lab Assignments -- Chapter 10: Process Monitoring and Enabling Pre-Processing, Startup, and Post-Processing Events -- Syntax -- Monitoring for a Process to Start -- Monitoring for a Process to End -- Monitor and Log as a Process Starts and Stops -- Timed Execution for Process Monitoring, Showing Each PID, and Timestamp with Event and Timing Capability -- Other Options to Consider -- Summary -- Lab Assignments -- Chapter 11: Pseudo-Random Number and Data Generation -- What Makes a Random Number? -- The Methods -- Shell Script to Create Pseudo-Random Numbers -- Creating Unique Filenames -- Creating a File Filled with Random Characters -- Other Things to Consider -- Summary -- Lab Assignments -- Chapter 12: Creating Pseudo-Random Passwords -- Randomness -- Creating Pseudo-Random Passwords -- Syntax -- Building the Password-Creation Script -- Other Options to Consider -- Summary -- Lab Assignments -- Chapter 13: Floating-Point Math and the bc Utility -- Syntax -- Creating Some Shell Scripts Using bc -- Other Options to Consider -- Summary -- Lab Assignments -- Chapter 14: Number Base Conversions -- Syntax -- Scripting the Solution -- An Easy, Interactive Script to Convert Between Bases -- Using the bc Utility for Number Base Conversions.

Other Options to Consider -- Summary -- Lab Assignments -- Chapter 15: hgrep: Highlighted grep Script -- Reverse Video Control -- Building the hgrep. Bash Shell Script -- Other Options to Consider -- Summary -- Lab Assignments -- Chapter 16: Monitoring Processes and Applications -- Monitoring Local Processes -- Remote Monitoring with Secure Shell and Remote Shell -- What about Waiting for Something to Complete Executing? -- Other Things to Consider -- Summary -- Lab Assignments -- Part III: Scripts for Systems Administrators -- Chapter 17: Filesystem Monitoring -- Syntax -- Adding Exceptions Capability to Monitoring -- Using the MB-of-Free-Space Method -- Using MB of Free Space with Exceptions -- Percentage Used - MB Free and Large Filesystems -- Running Filesystem Scripts on AIX, Linux, HP-UX, OpenBSD, and Solaris -- Other Options to Consider -- Summary -- Lab Assignments -- Chapter 18: Monitoring Paging and Swap Space -- Syntax -- Creating the Shell Scripts -- Other Options to Consider -- Summary -- Lab Assignments -- Chapter 19: Monitoring System Load -- Installing the System-Statistics Programs in Linux -- Syntax -- Scripting the Solutions -- Other Options to Consider -- Summary -- Lab Assignments -- Chapter 20: Monitoring for Stale Disk Partitions (AIX-Specific) -- AIX Logical Volume Manager (LVM) -- The Commands and Methods -- Other Options to Consider -- Summary -- Lab Assignment -- Chapter 21: Turning On/Off SSA Identification Lights -- Syntax -- The Scripting Process -- Other Things to Consider -- Summary -- Lab Assignment -- Chapter 22: Automated Hosts Pinging with Notification of Failure -- Syntax -- Creating the Shell Script -- Other Options to Consider -- Summary -- Lab Assignments -- Chapter 23: Creating a System-Configuration Snapshot -- Syntax -- Creating the Shell Script -- Other Options to Consider -- Summary -- Lab Assignment.

Chapter 24: Compiling, Installing, Configuring, and Using sudo -- The Need for sudo -- Configuring sudo on Solaris -- Downloading and Compiling sudo -- Compiling sudo -- Configuring sudo -- Using sudo -- Using sudo in a Shell Script -- Logging to the syslog with sudo -- The sudo Log File -- Summary -- Lab Assignments -- Chapter 25: Print-Queue Hell: Keeping the Printers Printing -- System V versus BSD versus CUPS Printer Systems -- Putting It All Together -- Other Options to Consider -- Summary -- Lab Assignments -- Chapter 26: Those Pesky Sarbanes-Oxley (SOX) Audits -- What to Expect -- How to Work with the Auditors -- What the Auditors Want to See -- Some Handy Commands -- Using the dirname and basename Commands -- Other Things to Consider -- Summary -- Lab Assignments -- Chapter 27: Using Dirvish with rsync to Create Snapshot-Type Backups -- How Does Dirvish Work? -- Configuring Dirvish -- Performing a Full System Backup -- Using Dirvish on the Command Line -- A Menu-Interface Shell Script to Control Dirvish -- Putting It All Together -- Using the dirvish ctrl Shell Script -- Other Things to Consider -- Summary -- Lab Assignments -- Chapter 28: Monitoring and Auditing User Keystrokes -- Syntax -- Scripting the Solution -- Other Options to Consider -- Summary -- Lab Assignments -- A Closing Note from the Author -- Appendix A: What's on the Web Site -- Shell Scripts -- Functions -- Index.