sed & awk, Second Edition
By Dale Dougherty & Arnold Robbins


Following are the changes made in the 1/01 reprint.


Here's the key to the markup:

        [page-number]: serious technical mistake
        {page-number}: minor technical mistake
        <page-number>: important language/formatting problem
        (page-number): language change or minor formatting problem
        ?page-number?: reader question or request for clarification


{51}  In the script code for the gres command, the following has been 
inserted as the first line:

#!/bin/sh

Also, the superfluous double quotes around "3" in the first line of the 
script have been removed.

Also, as it's common practice to output usage & error messages to stderr.
The first two echo commands have been appended with >&2 as follows:

echo Usage: gres pattern replacement file >&2

and:

echo $3 is not a file. >&2


(163) In the last line:

for a directories

has been changed to:

for directories