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Introduction to awk

Nov 09, 2010, 19:34 (1 Talkback[s])

"Awk is a pattern-scanning and text processing utility that captures information from text files creating reports in the process, modify files from one format to another, create databases and perform mathematical operations on data. The term "awk" comes from the names of the authors, Aho, Weinberger and Kernighan. Nawk is the newer version of awk and Gawk is the Gnu version. Often awk is a symbolic link to gawk as you can see on this CentOS machine.

"awk –version

GNU Awk 3.1.5
Copyright (C) 1989, 1991-2005 Free Software Foundation.

ls -l /bin/awk
lrwxrwxrwx 1 root root 4 May 22 07:43 /bin/awk -> gawk

"When awk is used data can be sent from standard input (stdin is in put from the keyboard), files, or from output of another process. When you engage awk it scans a file or the input, line by line from the first line to the last searching for the lines that match the criteria you have entered."

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