AWK Scripting Tutorial Text Processing Expert

Awk scripting tutorial
Awk scripting tutorial
Awk scripting tutorial

Awk Scripting Tutorial.   AWK is an interpreted programming language. It is very powerful and specially designed for text processing. Its name is derived from the family names of its authors – Alfred Aho, Peter Weinberger, and Brian Kernighan.

The version of AWK that GNU/Linux distributes is written and maintained by the Free Software Foundation (FSF); it is often referred to as GNU AWK.

Types of AWK

AWK – Original AWK from AT & T Laboratory.
NAWK – Newer and improved version of AWK from AT & T Laboratory.
GAWK – It is GNU AWK. All GNU/Linux distributions ship GAWK. It is fully compatible with AWK and NAWK.

Awk Scripting Tutorial

Installation Using Package Manager
Installation from Source Code

AWK WORKFLOW
Program Structure

BASIC SYNTAX
Command Line AWK
Program File AWK
AWK Standard Options

BASIC EXAMPLES
Column or Field Printing 
All Lines Printing 
Printing Columns by Pattern
Column in Any Order Printing 
Counting and Printing Matched Pattern
Printing Lines with More than 18 Characters
BUILT-IN VARIABLES
Standard AWK Variables
GNU AWK Specific Variables

OPERATORS
Arithmetic Operators
Increment and Decrement Operators
Assignment Operators
Relational Operators
Logical Operators
Ternary Operator
Unary Operators
Exponential Operators
String Concatenation Operator
Array Membership Operator
Regular Expression Operators

REGULAR EXPRESSIONS
Dot
Start of Line
End of Line
Match Character Set
Exclusive Set
Alteration
Zero or One Occurrence
Zero or More Occurrence
One or More Occurrence
ARRAYS
Creating Array
Deleting Array Elements
Multi-Dimensional Arrays
CONTROL FLOW
If Statement
If-Else Statement
If-Else-If Ladder

LOOPS
For Loop
While Loop
Do-While Loop
Break Statement
Continue Statement
Exit Statement

BUILT-IN FUNCTIONS
Arithmetic Functions
String Functions
Time Functions
Bit Manipulation Functions
Miscellaneous Functions

USER-DEFINED FUNCTIONS
OUTPUT REDIRECTION
Redirection Operator
Append Operator
Pipe
Two-Way Communication

PRETTY PRINTING
Escape Sequences
Format Specifier
Optional Parameters with %

AWK Command Explained Part-2

AWK Command Explained Part-1

Delete blank lines from a file – AWK

Printing Given Range of Lines

Fields using AWK

Particular line numbers text using AWK

Replacing text using AWK