AIX Advanced Shell Programming Tools — A 3-Day Course

 Open Public Course Closed In-House Course

Synopsis

This course is designed to give delegates practical experience using a range of AIX tools to manipulate text and incorporate them into AIX shell scripts.

The delegate will practice:-

• Using the Korn shell command line editor
• Backing up and restoring files
• Scheduling background jobs using cron and at
• Using file comparison utilities
• Using the head and tail utilities
• Using the cut and paste utilities
• Sorting files
• Using regular expressions
• Translating characters in a file
• Selecting text from files with the grep family of commands
• Editing text files with sed
• Creating programs with awk
• Using the Source Code Control System
• Using the make utility

Course Objectives

On completion of this course, the delegate will be able to make effective use of a wide range of standard AIX programming and development tools.

Suitable for

• Programmers, developers and system administrators who need to construct shellscripts using advanced text handling facilities and control projects using the sccs and make utilities.

Prerequisites

• Knowledge of the AIX Operating System to the level covered in the AIX Basics Course
• Shell programming experience to the level covered in AIX Shell Programming course

Publicly scheduled dates, locations, and prices

Contents:

Using the Korn Shell

• Features
• Command history facility
• Korn shell command history
• Korn shell command line editing
• Command aliasing
• Job control

Redirection, Pipes and Filters

• Standard I/O and redirection
• Pipes
• UNIX filters
• The tee command

Backup and Restore Utilities

• Archive devices
• The cpio command
• The tar command
• The dd command

Background Job Scheduling

• Starting background jobs
• Background tasks and the nohup command
• Process priorities and the nice command
• Job control
• Scheduling jobs with the at command
• Scheduling jobs with the cron command

Commands for Comparing Files

• Compare two files with the cmp command
• Compare two files with the comm command
• Compare two files with the diff and sdiff commands
• Identifying file differences

File Manipulation Commands

• The file command
• The head command
• The tail command
• The cut command
• The paste command

Sorting Files

• Introduction and command line syntax
• Sort options
• Sort by field specifying a field separator
• Sort in dictionary order
• Sort with ignore case
• Numerical sort
• Sort on part of a field
• Reverse sort order
• Eliminate duplicate lines in sorted output
• Merging sorted files
• Removing adjacent repeated lines with uniq
• Count repeated lines
• Display repeated and unrepeated words

Regular Expression Notation

• Using Special characters within patterns

Character Translation with the tr Command

• Introduction and command line syntax
• tr options
• Processing files
• Remove duplicate adjacent characters
• Deleting characters

od - Octal Dump

• Introduction and command line syntax
• od options
• Interpreting bytes as ASCII
• Interpreting bytes as ASCII numbers
• Interpreting bytes in octal
• Interpreting bytes in decimal
• Interpreting bytes in hex

Searching Files for Patterns

• grep introduction and command line syntax
• grep options
• Simple searches for text patterns in a file with grep
• Finding more complex strings
• Inverting searches
• Using regular expressions
• Using wildcards
• Specifying a set of characters
• Using fgrep
• Using egrep

The Stream Editor - sed

• Introduction and command line syntax
• The sed program structure
• sed program processing
• Use sed commands
• sed addresses
• sed instructions
• Hold and get functions
• Flow of control functions

The Pattern Scanning Utility - awk

• Introduction and command line syntax
• The awk program structure
• Use regular expressions
• Operators
• Simple patterns
• Extended patterns
• Comments
• Special patterns (BEGIN and END)
• Program variables
  • Built-in variables
  • User defined variables
• Mathematical Operators
• Enhanced printing
• Handling user variables
• Functions
• Built in functions
• The system function
• The getline function
  • User defined functions
  • Program control structures
  • Associative Arrays

The source Code Control System

• Overview of SCCS
• SCCS files
• SCCS deltas
• Creating a SCCS File
• Retrieving a delta
• Creating a new delta
• Deleting a delta
• Identification keywords
• Recovering from errors
• Leaf branches
• Joint editing
• Access control
• Additional get options
• Additional admin options
• The prs command
• prs data keywords
• The sact command
• The cdc command
• The what command
• The sccsdiff command
• The comb command

The make Utilitys

• Overview of make
• The makefile
• Invoking make
• Macros
• Internally defined makros
• Command line macro definitions
• Shell environment variables
• Macro assignment priorities
• Suffix rules
• Default suffix rules
• User defined suffix rules
• Command line notes
• Dummy targets
• Make command line options