How to do mv *.xyz *.abc in shell script??

[Tom Christiansen]

I still like this one (from the FAQ):

    #!/usr/bin/perl
    #
    # rename script examples from lwall:
    #	rename 's/\.orig$//' *.orig
    #	rename 'y/A-Z/a-z/ unless /^Make/' *
    #	rename '$_ .= ".bad"' *.f
    #	rename 'print "$_: "; s/foo/bar/ if <stdin> =~ /^y/i' *

    $op = shift;
    for (@ARGV) {
	$was = $_;
	eval $op;
	die $@ if $@;
	(rename($was,$_) || warn "$0: can't rename $was to $_: $!\n")
	    if $was ne $_;
    }

--
 "UNIX was never designed to keep people from doing stupid things, because 
  that policy would also keep them from doing clever things." [Doug Gwyn]