/usr/share/doc/libdevice-serialport-perl/examples/ is in libdevice-serialport-perl 1.04-3build2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libdevice-serialport-perl/examples/any_os.plx
/usr/share/doc/libdevice-serialport-perl/examples/demo1.plx
/usr/share/doc/libdevice-serialport-perl/examples/demo2.plx
/usr/share/doc/libdevice-serialport-perl/examples/demo3.plx.gz
/usr/share/doc/libdevice-serialport-perl/examples/demo4.plx
/usr/share/doc/libdevice-serialport-perl/examples/demo5.plx.gz
/usr/share/doc/libdevice-serialport-perl/examples/demo6.plx.gz
/usr/share/doc/libdevice-serialport-perl/examples/demo7.plx
/usr/share/doc/libdevice-serialport-perl/examples/demo8.plx
/usr/share/doc/libdevice-serialport-perl/examples/example1.txt
/usr/share/doc/libdevice-serialport-perl/examples/example2.txt
/usr/share/doc/libdevice-serialport-perl/examples/example3.txt
/usr/share/doc/libdevice-serialport-perl/examples/example4.txt
/usr/share/doc/libdevice-serialport-perl/examples/example5.txt
/usr/share/doc/libdevice-serialport-perl/examples/example6.txt
/usr/share/doc/libdevice-serialport-perl/examples/example7.txt
/usr/share/doc/libdevice-serialport-perl/examples/example8.txt
/usr/share/doc/libdevice-serialport-perl/examples/options.plx