A Practical Guide to LinuxR Commands, Editors, and Shell Programming

A gawk command line has the following syntax:

gawk [options] [program] [file-list] gawk [options] f program-file [file-list]

The gawk utility takes its input from files you specify on the command line or from standard input. An advanced command, getline, gives you more choices about where input comes from and how you read it. Using a coprocess, gawk can interact with another program or exchange data over a network. Unless you redirect output from gawk, it goes to standard output.