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To add one or more 'awk' commands to a Unix or Linux shell script, using the newer version of 'awk', called 'nawk' in some Unix operating systems. 'awk' is a programming language created by Al Aho, Peter Weinberger and Brian Kernighan of Bell Laboratories (hence the name 'awk') and released with Unix Version 7 (circa 1978). The new version, 'called 'nawk', was released c irca 1985. Usually done to either improve the perfomance of a shell script or to allow the script to perform something that the shell itself is not capable of, such as floating point arithmatic.
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