ok changed my mind too run this

 
sub runDir {
    my $prefix = shift @_;
    print '*'.$prefix,"\n";
    my $dir = shift @_;
    print "**$dir*","\n";
    opendir(DIR, $dir) or die $!;
    my @entries = readdir(DIR);
    # print @entries,"\n";
    close(DIR);
    foreach my $file (@entries) {
        next if ($file =~ /^\.+$/);
        if ( -d $dir . '/' . $file) {
            print '***down runDir -- '.$prefix . $file . '_'.','. $dir
+ . '/' . $file."\n"; 
            runDir($prefix . $file . '_', $dir . '/' . $file);
            print '***up  runDir -- '.$prefix . $file . '_'.','. $dir 
+. '/' . $file."\n"; 
        } elsif ( ( -f $dir . '/' . $file ) && ( $file =~ /\.config$/ 
+) && ($file !~ /^$prefix/)) {
            my $suffix = $file;
            $suffix =~ s/^(\S+)-.+\.config$/$1.config/;
            
            print '****rename '.$dir . '/' . $file.','. $dir . '/' . $
+prefix . $suffix ."\n"; 
#            rename $dir . '/' . $file, $dir . '/' . $prefix  . $suffi
+x ;
        }
    }
}
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dayum i hate double quotes a lot.