OK, nice tutorial. But where (I mean about file) I have to place:

rm -rf /var/lib/dhcp/ /var/lib/dhcpcd5 /var/run /var/spool /var/lock /etc/resolv.conf
ln -s /tmp /var/lib/dhcp
ln -s /tmp /var/lib/dhcpcd5
ln -s /tmp /var/run
ln -s /tmp /var/spool
ln -s /tmp /var/lock
touch /tmp/dhcpcd.resolv.conf; ln -s /tmp/dhcpcd.resolv.conf /etc/resolv.conf