/usr/share/initramfs-tools/hooks/zz-dhclient is in isc-dhcp-client 4.3.3-5ubuntu12.9.
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 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | #!/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/
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