disabling predictable network interface names in xubuntu 15.10
As root, in the file /etc/default/grub
Add net.ifnames=0 biosdevname=0 to the kernel command line in your grub config.
To do so, change the following line
GRUB_CMDLINE_LINUX=""
to
GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0"
then save the file, run update-grub and then reboot.