/usr/lib/pd/ is in pd-pduino 0.5.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/pd/extra/pduino/LICENSE.txt
/usr/lib/pd/extra/
/usr/lib/pd/extra/pduino/
/usr/lib/pd/extra/pduino/arduino.pd
/usr/lib/pd/extra/pduino/README.txt
/usr/lib/pd/extra/pduino/examples/
/usr/lib/pd/extra/pduino/examples/arduino-test.pd
/usr/lib/pd/extra/pduino/examples/LED-lighting-fade.pd
/usr/lib/pd/extra/pduino/examples/arduinomega-test.pd
/usr/lib/pd/extra/pduino/examples/simple_input.pd
/usr/lib/pd/extra/pduino/examples/wiring-test.pd
/usr/lib/pd/extra/pduino/arduino-help.pd
/usr/lib/pd/extra/pduino/arduino-stress-test.pd
/usr/lib/pd/extra/pduino/pduino-meta.pd