This file is indexed.

/etc/init.d/pppd-dns is in ppp 2.4.7-1+2ubuntu1.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#!/bin/sh -e
### BEGIN INIT INFO
# Provides:          pppd-dns
# Required-Start:    $local_fs
# Required-Stop:
# Default-Start:     S
# Default-Stop:
# Short-Description: Restore resolv.conf if the system crashed.
# Description:       Restore /etc/resolv.conf if the system crashed before the
#                    ppp link was shut down.
### END INIT INFO

. /lib/lsb/init-functions

case "$1" in
  start) ;;
  stop|restart|force-reload) exit 0 ;;
  *) echo "Usage: $0 {start|stop|restart|force-reload}" >&2; exit 1 ;;
esac

[ -x /etc/ppp/ip-down.d/0000usepeerdns ] \
	&& exec /etc/ppp/ip-down.d/0000usepeerdns