I think I get what you are asking.. ?
sick this in ~/bin/musthave and chmod 0755
#!/usr/bin/perl
use strict;
my ($what,$file)= @ARGV;
open(HANDLE, $file);
my @match = grep { /$what/ } <HANDLE>;
close HANDLE;
scalar @match or print STDERR "$file is missing $what\n";
exit;
then do ..
$ find /where/my/stuff -type f -iname "*txt" -exec musthave 'I WANT THIS INN HERE' '{}' \;
What I like doing with these little things that are useful and may be used on one or a thousand files.. is to isolate the problem to *one* file, and use the system to call it multiple times (or antoher script to iterate) as needed. That way you isolate the problem into smaller parts.
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