This file is indexed.

/usr/share/initramfs-tools/hooks/zz-dhclient is in isc-dhcp-client 4.3.5-3ubuntu7.

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

PREREQ=""

prereqs()
{
	echo "$PREREQ"
}

case $1 in
prereqs)
	prereqs
	exit 0
	;;
esac

if [ ! -x /sbin/dhclient ]; then
	exit 0
fi

. /usr/share/initramfs-tools/scripts/functions
. /usr/share/initramfs-tools/hook-functions

copy_exec /bin/run-parts
copy_exec /sbin/dhclient
copy_exec /sbin/dhclient-script
cp -a /usr/lib/initramfs-tools/etc/dhcp/ $DESTDIR/etc/dhcp/
mkdir -p $DESTDIR/var/lib/dhcp/