Useful Unix commands

For a long time I've maintained a memory aid in the form of a list of useful commands which can be used on the command line for Linux, OS X, BSD, Solaris, etc., so I thought I'd list them in a blog post in case they come in useful for…

How to use Flickr favourites as your screensaver in Mavericks and Mountain Lion

Mountain Lion was an improvement on Lion, which I had mixed feelings about when it was released. Unfortunately, however, Apple apparently decided that RSS is a dead technology, and consequently the handy RSS screensavers were removed, which means there was no simple way of creating a screensaver out of one's…

Creating a two-node CentOS 6 cluster with floating IP using CMAN and Pacemaker

Originally I was using Heartbeat to create two-node Linux clusters with floating IPs, but when Heartbeat stopped being developed I needed to figure out how to use Corosync and Pacemaker for this instead. Somewhat annoyingly, Linux HA stuff has changed yet again in CentOS 6.4, so now it's necessary…

Emerging from the formless void...

What was previously my own electronic music project Dicepeople has now grown into an exciting audiovisual collaboration with the talented and enthusiastic Rafael Filomeno. Our first performance together with music and visuals is happening this Friday 6th September at The Nest in Dalston, London. If you're in London and free…

Creating a Bash-based web server on my new Raspberry Pi

Recently I decided to correct my oversight of not having obtained a Raspberry Pi, so I purchased the Model B version along with the nice clear case and named it "Colossus". Never having owned an Acorn Archimedes (I was an Amiga man) the first thing I did was play with…

Warpvision - (Motion)

"Warpvision presents an Artificial Intelligence video - (Motion) - electronic listening music for the eyes" I was lucky enough to see Warpvision's fantastic "(Motion)" at its launch party at the Institute of Contemporary Arts in 1994 and I've loved it ever since. Sadly Warp have never released it on DVD…

New website for my system administration and infrastructure consultancy business

I became a self employed system administrator in 2011 and (touch wood) my freelance infrastructure business has been going fairly well so far. I thought it was about time I built a marketing website for my business, and I wanted to create a simple, professional-looking site without having to spend…

Bash script to extract photos from vCard files

If you ever find yourself wanting to extract the contact photos from vCard/VCF files then this may be the script for you. I know that this works on a vCard export of multiple contacts from the Contacts app in OS X Mountain Lion. It's possible you might have to…

Get a continuously updating display of client IP addresses on a web server using X-Forwarded-For

Sometimes it's desirable to have a continuously updating display of the IP addresses which are hitting a web server, with an indication of how many times each IP address has made a request. This may be because you suspect a DoS or DDoS attack, or there may appear to be…

Python script to convert ICS-exported List from Reminders app to plaintext

I make extensive use of the Reminders app in Mountain Lion* to keep track of tasks and to-do items, and I wanted a way to export a list of reminders to plaintext, so I knocked up a quick Python script to take an ICS file exported from a List in…