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  1. or download this
    use File::Marker;

...
# save and rewind
$file->save_markers( $index_filename );
$file->goto_marker('LAST'); # rewind
  2. or download this
    use File::Marker;

...
$file->load_markers( $index_filename );

$file->goto_marker( 22 ); # start of 23rd line