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  1. or download this
    
    my $fh = new IO::Uncompress::Gunzip "input file",
        or die "Cannot open file ..." ;
    
    my $line = <$fh> ;
    
  2. or download this
    
    my $fh = new IO::Uncompress::Gunzip "input file",
    ...
        or die "Cannot open file ..." ;
    
    my $line = <$fh> ;
    
  3. or download this
    sub rewind
    {
    ...
    }
    
    rewind($fh, "somefile");