Awk
The
GNU awk (Gawk)
webpage has a
manual
.
Books about the awk language:
The AWK Programming Language
by Alfred V. Aho, Brian W. Kernighan, and Peter J. Weinberger (Addison-Wesley, 1988)
Gawk: Effective awk Programming
by Arnold Robbins
sed & awk, 2nd Edition
by Dale Dougherty and Arnold Robbins (O'Reilly, 1997)
Downloading:
GNU awk can be downloaded from the
GNU project
.