There is a step missing in that guide.
You need to edit this file -

sudo nano /etc/udev/rules.d/70-persistent-net.rules

and add a line for your networking interface.
Usually if you perform sudo ifconfig -a you’ll find an ethernet interface names as ens4 or ens3p2 or something that like that. That needs to be renamed to eth1. Copy it’s HwAddr and add a line to the 70-persistent-net.rules in this format

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="0a:83:3f:62:be:86", NAME="eth1"

What If I followed every guide, digital oceans guide, and this guide, plus a lot more. And I cant ping my private ips within the same datacenter, but I can certainly ping the public IP.

Now… after following more guides, eth1 shows up, but there is no gateway, ip, netmask and 38 hours and digital ocean hasn’t responded to my ticket. The community is the only other option

Also the above
“‘sudo nano /etc/udev/rules.d/70-persistent-net.rules”’
doesn’t exist. The directory does but that file does. and my interface names showed up just fine.

I know a way to fix it but I’m trying to avoid that.

Help would be appreciated.

This is why I prefer Excelnode. You will ALWAYS get a response in-under 10hours....90% of the time in the 3 years I’ve used them. I’ve never had to wait for a response for more than 1 hr.

Come to digital ocean for private ips....Response wait time 24-48hrs+

ANY ASSISTANCE PLEASE DIGITAL OCEAN. Probably will just be cancelling my service since the lack of support from digital ocean.

Also need to start the interface

sudo ifconfig eth1 up