It has been far too long since a video tutorial made its debut here, so I would like to introduce a new tutorial!

Cacti is a great graphing and monitoring tool, but I have struggled in the past with getting it installed, and getting it to do what I want. It can be a little bit complex and fiddly, but recently I have had more success and am putting it to good use measuring and graphing more things.

In this tutorial, I will walk you through installing Cacti on a basic CentOS 6 system with Apache, PHP and MySQL already installed. By the end of the video, it is collecting information for the default graphs in the default installation.

I hope to extend this video series soon with some details about the additional graphs I have recently succeeded at getting installed.

As always, your comments and feedback are appreciated!

Three years ago, I made the slightly crazy decision to run this website from my own server. This page is brought to you by a four-year-old generic PC that sits under my desk and dutifully hands out the web pages of my site to anyone from anywhere on the internet that asks for them.

Over the last three years, running my own server has taught me a lot. It has given me complete freedom and control, as well as complete responsibility over my own website. The hardware, software and configuration are all my own thing — if I get it wrong, I have to fix it.

» Read the rest of this post…

Thanks to a great suggestion by Nick Charlton, I decided to put together a screencast demonstrating how to set up public key authentication for logging into SSH servers on the Mac.

Setting up a keypair and then using it to log in to remote systems, instead of remembering separate usernames and passwords, can be a bit of a fiddly business, but I hope that in this screencast I can show how to get it set up.

Set Up Public Key Authentication for SSH on the Mac from Peter Upfold on Vimeo.

Take a look and let me know what you think!

Find this tutorial useful?

Due to some work that is happening to our house (hot water here we come), the electricity supply will need to be turned off at some point. This means that there will be some downtime for this server during the period of Monday 11th – Wednesday 13th.

Unfortunately, I will not actually be here at the time and it is not yet clear when or for how long the downtime needs to occur. It should, however, be a relatively short downtime period; I am not expecting the server to be down the whole three days.

In any case, the machine will be safely powered down before the supply is turned off and will come back up as soon as possible.

UPDATE: In the end, it didn’t need to go down at all! Everything is still running smoothly.

My server (and subsequently this site) is going to be down tomorrow between 10:00 AM and 1:00 PM GMT, for scheduled maintenance. Basically a clear out the cobwebs (which is scarily literal) job, and the opportunity to double-check that everything hardware-wise is hunky-dory. Also I’ll be doing a couple of special backups so I have even higher levels of redundancy, while I get the opportunity of the server being down.

See you on the other side.

UPDATE: Completed successfully, and I didn’t break anything.