Ubuntu – Carmine Bufano

OVN Integration & Coexistence on Xenserver and XCP-ng

April 20, 2026

Research on multi hypervisor network virtualization using Open Virtual Network Summary The cleanest technical path is not to bolt a foreign br-int onto a host that already has its networking lifecycle owned by XAPI. The safer pattern is to let…

How to Fix Openstack Horizon Dashboard on Centos Stream 9 error: InvalidCacheBackendError

November 2, 2024

If you have recently deployed Openstack Caracal with RDO Packstack you may run into a problem when you first load the Horizon Dashboard. If you get the “Something went wrong” text instead of the regular login page even though Packstack…

Top 3 Online Resources to Learn Coding

September 20, 2024

Learn to write your own applications for fun and profit. Here are quality free resources online that I can personally vouch for. I get nothing for suggesting these websites.

Fix Loud Fans in Dell PowerEdge Servers, Without Taking it Apart!

March 15, 2024

There are many invasive techniques to lowering your lab server’s decibels. Here is a way to do it… command line style! First, make sure you do this from a Linux server. I used Ubuntu. apt install ipmitool Now you have…

Digital Ocean How to download a copy or snapshot of your droplet or vm locally and run it on your own server

December 26, 2017

* This post uses the DD command which if used improperly WILL completely destroy your system. If you are unsure about what you are doing do not even attempt anything below. The command below will overwrite any drive you tell…

How to find your current Linux kernel version from a terminal or command line

February 2, 2016

Many a time you quickly need the exact version for this type: If you require more information then use: Quicky! -Carmine

Allow root access via ssh in Ubuntu 14.xx

August 31, 2015

Have you tried to log into a cloud instance of Ubuntu server recently as root using a ssh key? Hmm.. so you see, Please login as “ubuntu” user rather than root. Try this: reboot the server or restart sshd services.…

Real World Application of GRE and VXLAN Encapsulation between Mixed Hypervisors on Disjoint Networks PART-1.

November 27, 2014

Happy Thanksgiving! I thought about putting this all into one post. I quickly realized it wouldn’t be possible as there is just to much! Contrary to what this first post’s format this will be a technical how to. This is…

How to self host many web servers with different domains & URLs with one public IP

August 25, 2014

There are scenarios where you only have one public ip address but want to host many domains, each on their own dedicated virtual or physical server. For instance you may want to host several different WordPress sites from your home…