HP

• PERL programming

• HP-UX and UNIX general users, system and network administrators, and software developers.

• UNIX Fundamentals (HP 51434S) or equivalent experience
• Fundamental knowledge of programming

After completing this course you will be able to:

• Understand POSIX shell programming and use it to save time with automated scripts
• Write efficient programs by understanding how shell scripts are processed
• Customize shell start-up files
• Easily control your administration tasks

Introduction to POSIX shell scripts

• What is a shell script?
• Script execution
• The subprocess environment
• Shell features

Shell scripting

• Which shell?
• Recommended shell format
• Planning to write a shell script
• Portability issues

Variables

• Variables
• Displaying and using variables
• Concatenation and substrings
• Other sources of data for variables

User input

• Reading user input
• Positional parameters
• Creating positional parameters
• Conditional substitution
• External influences

Designing program output

• Variable attributes
• Formatted data
• Cursor positioning and terminal echo

Shell arithmetic

• Creating Integer-only Variables
• Base 10 and Others
• Working with arithmetic operators and data

Branching and logic testing

• Logic testing
• Conditional operators
• Multi-way branching and the 'case' statement

Shell patterns

• Basic expressions
• More complex patterns
• Pattern combinations

Program loops

• The 'while' loop
• The 'until' loop
• The 'for' loop
• Breaking out of a loop and continuing
• The 'select' loop

The 'getopts' Command

• Processing arguments
• The getopts and OPTARG variable
• The OPTIND variable

Array variables

• Substituting and counting
• Using integer variables as element numbers

Functions and function libraries

• Displaying current shell functions
• Declaring and using functions
• Variable scope
• Function libraries and recursion

Managing input and output

• File descriptors
• Reading / writing using file descriptors
• Redirecting, parameter lists and 'here' documents
• Creating parameter lists from input lines

Traps and signals

• Common signals
• The trap and stty commands

Regular expressions

• Regular expressions
• Metacharacters
• The grep command

Introduction to 'awk'

• Record processing
• Pattern matching and relational expressions
• 'awk' variables

Variables, strings and arithmetic operations

• 'awk' user defined variables
• Environment variables
• Arithmetic operations
• String manipulation
• Formatted output
• Command line arguments

'awk' flow control

• Conditional 'if', while and for loops
• Arrays
• 'getline', 'next' and 'exit'
• Processing arrays
• Associative arrays

Stream editing with 'sed'

• Substituting text
• Deleting and printing lines
• Reading and writing files
• Multiple 'sed' editor functions

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