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 mount the ISO image using Devices –> Insert Guest Additions CD Image… I find that /media/cdrom is empty whereas you would expect to find the install script. This article explains how I install the additions.Continue reading

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 shame because the material itself is generally of a really high quality. The problem I hit here was after starting up the virtual machine they provide for learning against I found I didn’t have a connection to the Internet. The instructions mention putting the network adaptor into bridged mode but nothing about what to do if the adaptor doesn’t configure itself.Continue reading

Only detected a i686

One of the servers I manage is currently running Ubuntu 12.04 (Precise Pangolin) but in a little over a month 14.04 (Trusty Tahr) will be making an appearance. Now there’s no good reason for me to be rushing out an upgrading but it’s got to be done at some point so I thought I’d get my hands on a nightly build of 14.04 to see what’s changed.Continue reading