Contents at a Glance
PART 1 Basic Scripting Techniques
CHAPTER 1 Shell Script Debugging
CHAPTER 2 Standard Function Library
CHAPTER 3 Date and Time Manipulation
CHAPTER 4 Comparisons and Tests
CHAPTER 5 Accepting Command-Line Options, Switches, and Parameters
CHAPTER 6 Testing Variables and Assigning Defaults
CHAPTER 7 Indirect Reference Variables
CHAPTER 10 Piping Input to read
PART 2 System Interaction and Advanced Techniques
CHAPTER 11 Math from the Shell
CHAPTER 13 Self-Linked Scripts
CHAPTER 14 Throttling Parallel Processes
CHAPTER 15 Command-Line Editing and History
CHAPTER 16 Scripting from the Command Line
CHAPTER 17 Automating User Input with expect
CHAPTER 19 Instant Keyboard Response
CHAPTER 21 A Brief Tour of the X Display Environment
CHAPTER 22 X Navigation Window
CHAPTER 23 Command-Line E-mail Attachments
CHAPTER 24 Text-Processing One-Liners
CHAPTER 25 Editing Files in Place
CHAPTER 26 Evaluating Variables in a Flat File
CHAPTER 28 Free-Format Output Using cat
CHAPTER 29 Automating Interactive Processes
PART 3 Useful Scripts
CHAPTER 30 Automating E-mail with procmail
CHAPTER 31 Process-Management Monitor
CHAPTER 32 Managing File Counts
CHAPTER 33 Processes Running from inittab
CHAPTER 35 Colorful /proc Reporting
CHAPTER 36 Password-Aging Notification
CHAPTER 37 A Pseudo–shadow File
CHAPTER 38 Linux Gold-System Build
CHAPTER 40 Removing Large Files and Log Rolling
CHAPTER 42 Network Adapter Failover
APPENDIX C Other Shell-Scripting Resources