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Basics of EC2

I have previously written about my work packaging the tools to manage Amazon EC2 [1].

First you need to login and create a certificate (you can upload your own certificate – but this is probably only beneficial if you have two EC2 accounts and want to use the same certificate for both). Download the X509 […]

Christian Principles in an Election Year

The National Council of Churches in the US [1] has produced some advice for Christian voters titled Christian Principles in an Election Year [2]. It starts by saying “Your church, your communion, and the National Council of Churches USA do not endorse any political party or any candidate” (which is in bold in their text) […]

Types of Cloud Computing

The term Cloud Computing seems to be poorly defined at the moment, as an example the Wikipedia page about it is rather incoherent [1].

The one area in which all definitions of the term agree is that a service is provided by a varying number of servers of which the details are unknown to the […]

Integrity and Mailing Lists

One significant dividing factor between mailing lists is the difference between summary lists (where the person who asks a question receives replies off-list and then sends a summary to the list) and the majority of mailing lists which are discussion lists (where every reply goes to the list by default).

I have seen an argument […]

Jabber

I’ve just been setting up jabber.

I followed the advice from System Monitoring on setting up ejabberd [1]. I had previously tried the default jabber server but couldn’t get it working. The ejabberd is written in Erlang [2] which has it’s own daemon that it launches. It seems that Erlang is designed for concurrent and […]

The Latest Dick Smith Catalogue

I was just reading the latest catalogue from Dick Smith Electronics (a chain of computer stores in Australia).

The first interesting thing that I noticed is that laptops are cheaper than desktops in all categories. For any combination of CPU power and RAM in a desktop system I can see a laptop advertised with similar […]

Links October 2008

Here’s a blog post suggesting that anti-depressant drugs such as Prozac may have helped the US mortgage crisis [1]. Apparently such drugs cause poor impulse control, so it wouldn’t be a good idea to attend a house auction while using them.

Here’s an interesting idea about lecturing, give 20 minute talks with something else (practical […]

Moth in my Celery

Above is a picture of a moth that I found in a packet of shrink wrapped celery from Foodworks (a Melbourne chain of grocery stores).

I took several pictures from different angles, but I found that an almost direct photo captured it best, you can see the reflection of the flash covering part of […]

Upgrading a server to 64bit Xen

I have access to a server in Germany that was running Debian/Etch i386 but needed to be running Xen with the AMD64 version of Debian/Lenny (well it didn’t really need to be Lenny but we might as well get two upgrades done at the same time). Most people would probably do a complete reinstall, but […]

Kernel issues with Debian Xen and CentOS Kernels

Last time I tried using a Debian 64bit Xen kernel for Dom0 I was unable to get it to work correctly, it continually gave kernel panics when doing any serious disk IO. I’ve just tried to reproduce that problem on a test machine with a single SATA disk and it seems to be working correctly […]