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This section presents a number of POSIX utilities that are implemented in
awk. Reinventing these programs in awk is often enjoyable,
because the algorithms can be very clearly expressed, and the code is usually
very concise and simple. This is true because awk does so much for you.
It should be noted that these programs are not necessarily intended to
replace the installed versions on your system. Instead, their
purpose is to illustrate awk language programming for "real world"
tasks.
The programs are presented in alphabetical order.
14.2.1 Cutting out Fields and Columns The cututility.14.2.2 Searching for Regular Expressions in Files The egreputility.14.2.3 Printing out User Information The idutility.14.2.4 Splitting a Large File into Pieces The splitutility.14.2.5 Duplicating Output into Multiple Files The teeutility.14.2.6 Printing Non-Duplicated Lines of Text The uniqutility.14.2.7 Counting Things The wcutility.