AWK : AWK is a programming language used to manipulate data and create reports.

A= Alfred Aho    W=Peter Weinberg    K= Brian Kernighan

The authors of the language.

Versions of AWK. There are is a number of version of awk: old awk, new awk, gnu awk (gawk), POSIX awk and others.

On most systems, the command is awk using the old version, nawk if using the new version, and gawk if using the gnu version.

Format : 

awk 'pattern'  filename

awk '{action}' filename

awk 'pattern {action}' filename

------------------------------------------------------------

Sample file named employees

Tom Jones        4425            5/12/67        543355

Mary Adams    5336            12/4/63        28764

Sally Chuning    1996            7/14/56        67000

Billy Brom        1683            9/21/55        336589

------------------------------------------------------------

Exercise : try the following awk commands.

awk  '/Mary'  employees

awk '{print $1}' employees   

            Tom Mary Sally Billy

awk '/Sally/{print $1, $2}' employees

        Sally Chuning

date | awk '{print  "Month: " $2 " \nYear: " , $6}'

        Month: Jul

        Year : 2002