RenamingFiles

This is a script for renaming files with a regexp. I found this on the 'net. I think the original source was the Perl Cookbook (or something like that). It is trivial to change it so that it copies instead of renaming.
rename

#!/usr/bin/perl

$op = shift or die "Usage: rename expr [files]\n";

chomp(@ARGV = ) unless @ARGV;

for (@ARGV) {
    $was = $_;
    eval $op;
    die $@ if $@;
    rename($was, $_) unless $was eq $_;
}

# The first argument to the script should be a Perl expression that will be
# evaluated for every file named on the command line, or (if there are none)
# every file on the standard input stream, one per line.  When the expression
# is evaluated, $_ (the default variable) will contain a file name.  If
# evaluating the expression changes $_, the file will be renamed to the new
# value of $_.
#
# Examples:
#
# Change spaces to underscores:
# rename 's/ /_/g'
# or
# rename 'tr/ /_/'
#
# Change .foo extensions to .bar:
# rename 's/\.foo$/.bar/' *
#
# Change .foo to .bar in an entire directory tree:
# find . -type f | rename 's/\.foo$/.bar/'
#
# Append a .bak extension to all .cc files:
# rename '$_ .= ".bak" if /\.cc$/' *

comments: ... --pbier, Fri, 16 Feb 2007 16:15:34 +1300 reply
This script did not work for me so I grabbed the original from the perl cook book http://www.unix.org.ua/orelly/perl/cookbook/ch09_10.htm