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  1. or download this
    $ perl -T -MScalar::Util=tainted -wle 'print tainted $0 ? "Taint mode 
    +on" : "Taint mode off"' 
    Taint mode on
    $ perl    -MScalar::Util=tainted -wle 'print tainted $0 ? "Taint mode 
    +on" : "Taint mode off"' 
    Taint mode off
    $
    
  2. or download this
    $ perl -Twle 'eval {open my $fh, "+>$0"}; print $@ =~ /Insecure/ ? "Ta
    +int mode on" : "Taint mode off"'
    Taint mode on
    $ perl  -wle 'eval {open my $fh, "+>$0"}; print $@ =~ /Insecure/ ? "Ta
    +int mode on" : "Taint mode off"'
    Taint mode off
    $