-
As I mentioned in the previous article Understanding Bridges, Linux and most other operating systems have the ability to create virtual interfaces which are usually called TUN/TAP devices. This article will discuss those devices with particular focus on how they…
-
Understanding Bridges
In this article I’ll discuss network bridges and where they are commonly used (spoiler: they aren’t any more). Mainly though I want to discuss how bridges are used in an OpenStack set up as building a personal cloud is my…
-
Understanding VLANs
The aim of this article is to explain VLANs to someone who has a reasonable understand of how a computer network works. Recently I’ve been reading up on OpenStack as I’d like to put together a small personal cloud for a…
-
WobblyStack – Reading List
I had to read a lot before I could get to the point where I felt I could write a script that installed OpenStack for me. The links below are a selection of articles that I found useful. This is…
-
A Quick Introduction to Open vSwitch
In a previous article I discussed bridges and showed how the Linux utilities bridge-utils and iproute2 could be used to create virtual bridges within a system. This is great for simple set up but when deploying a cloud environment a bit more functionality…
-
Installing VirtualBox Additons on Ubuntu Server
I have a number of Ubuntu 14.04 virtual machines installed under VirtualBox running on Windows 8.1 and occasionally I find it useful to have the VirtualBox additions installed. Unfortunately for me the documented process doesn’t seem to work. Whenever I…
-
WatchedFlix
WatchedFlix home page coming soon…
-
Udacity Computer Networking Course Notes
I’ve just started the Udacity course on Computer Networking and I’ve hit a few bumps along the way so I thought I’d document them here for others to find.
-
Mininet Waiting for Network Configuration
I recently started taking the Udacity course on Computer Networking and while it looks like a good course it suffers from the same problem all the Udacity courses seem to suffer from: really badly put together examples and quizzes. It’s a…
-
Using PuTTY for Key-Based SSH Login
If you are on Windows and need to “shell” into a Linux machine then PuTTY is the tool of choice. For password based logins it’s as simple as entering the IP address or name of the machine you want to…
-
WobblyStack – A Single Node OpenStack Install
For a couple of years now I’ve run a small VMWare virtualization system for my business. Broadly speaking it’s gone well and been fairly uneventful. The only panic came when I transitioned from the free to the small business version…
-
ManagedBeanCreationException – What’s gone wrong now!
I recently failed to inject a managed bean into another bean that I was writing and for the life of me I couldn’t see what I’d done wrong. As is often the case it’s the little things that trip us…