calum.org:~#

If you have a remote server (such as a VM, Amazon instance, etc) with a bit of spare storage, you could use it as remote backup. It'll be quite slow (dependent on your internet connection speed), but you can just automate backups, and then it doesn't re...

One of the main problems with SSL adoption is the cost of SSL certificates. Let's Encrypt aims to allow everyone to obtain SSL certificates for free. They would prefer you to run a script, as root, which will obtain the certificate, and update your w...

After using the very good websdr site, I've become interested in software defined radio. The hardware that I'm interested in is the Funcube Pro + dongle, which supports 150kHz to 240MHz and 420MHz to 1.9GHz. The best SDR software on Linux seems t...

I've created a site that shows a few of the many amateur radio contacts that are currently occurring across the world. Many many contacts take place every minute across the world. Some of these are logged on a network called the DX Cluster. The si...

If you want a safe, private, ad-free browsing experience, then in my mind, you can't do better than Firefox with a few plugins. Some plugins give you benefit without any need for action on your part. Some however require some input from yourself, and...

The results of the 2015 General Election show quite clearly what a bad system First Past The Post is. The current system means that it's possible for Party A to get 49.9% of the votes, and Party B to get 50.1%, and for Party B to win 100% of the seat...

If you use disk encryption in Linux, there's a good chance you're using LUKS, a standard implementation of it. LUKS The first few bytes of your encrypted partition contain a LUKS header, which contains things like the cipher, cipher mode, passphrase...

There has been a lot of debate about the move to systemd by virtually all the Linux distros. I'm firmly of the opinion that it's a bad thing, handled badly. I'm actually amazed at how many distros have adopted it, and how quickly it has happened, pre...

During an SSL negotiation, SSL clients suggest a list of ciphers to the server, but the server can pick one with lower security than you'd perhaps like. If you want to ensure that Firefox only uses PFS-enabled ciphers to connect to websites, you can ...

I feel very fortunate to be working where I'm working at the moment. We've reached a really nice spot in our development techniques, methods, tools, etc. I work in a small part of a large corporation writing services to support our products. The serv...