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I’ve got a couple of old Dell PowerEdge 860 servers. They are nothing to write home about but they are functional and good enough for playing around with (I’m investigating KVM and Xen virtualization at the moment). What I need…
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Installing and Running KVM on Ubuntu 14.04 Part 1
I’ve been running my own servers for many years now but recently I’ve started to get the feeling that I could be doing a better job of it. I’ve played with virutalization a little both on the desktop and on real…
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Understanding TUN TAP Interfaces
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…
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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…
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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…
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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…
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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…
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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…
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WatchedFlix
WatchedFlix home page coming soon…
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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.
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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…
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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…