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  1. or download this
    open (OLDTIME, "time.txt");
    $time = <OLDTIME>;
    ...
    open (TIME, ">time.txt");
    print TIME "$nowtime";
    close(TIME);
    
  2. or download this
    perl -e '$cat = "cat"; if ($cat =~ /\143\x61\x74/) { print "Its a cat!
    +\n"; } else { print "Thats a dog\n"; } print "\n";'