/usr/share/bug/ifplugd/script is in ifplugd 0.28-19ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | #!/bin/sh
exec >&3
echo " /sys/class/net/ interfaces:"
ls -ad /sys/class/net/*/
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