dpkg-query -Wf '${Package} ${Priority}\n' | grep ' required' | sed 's/ required//' > list_white_unsorted
echo 'ifupdown' >> list_white_unsorted
echo 'isc-dhcp-client' >> list_white_unsorted
dpkg-query -Wf '${Package} ${Priority}\n' | grep ' required' | sed 's/ required//' > list_white_unsorted
echo 'ifupdown' >> list_white_unsorted
echo 'isc-dhcp-client' >> list_white_unsorted