nawk [options] ['program'] [files] [variable=value]New version of awk, with additional capabilities. nawk is a pattern-matching language useful for manipulating data. See Chapter 11 for more information on nawk.
-f fileRead program instructions from file instead of supplying program instructions on command line. This option may be specified multiple times; each file is concatenated with the others to make up the program source code.
-F regexpSeparate fields using regular expression regexp.
-v variable=valueAssign value to variable before executing 'program'.
=valueAssign value to variable. When specified intermixed with files, the assignment occurs at that point in the processing.