Adding an extra IP to your VPS with Ubuntu

Edit your networking interfaces file:

sudo nano /etc/network/interfaces

Use these instructions (they are in Dutch): https://www.transip.nl/knowledgebase/artikel/219-hoe-voeg-ipv4-ipv6-adres-mijn/#ubuntu16ipv4

Restart network facilities with:

sudo ifdown eth0 && sudo ifup eth0

Also bring up your new ip address:

sudo ifup eth0:

Check if new ip address(ess) are added with:

ifconfig -a