"Unix is dead, long live Unix" – a headline that is still as topical today as it was in 2009, when a blog with that title was published to mark Unix’s 40th birthday.

In its broadest sense, virtualisation can be seen as the progressive freeing up of any computing function – compute, storage, network – from the constraints of its physical infrastructure. So far, virtualisation has been a continuous evolution, from the first virtual machines (VMs) to the world of hybrid cloud, and there is no sign yet of this evolution losing momentum.

The range and impact of Information Security (IS) threats has grown and changed continually over the last 40 years or more, along with the motivations and drivers for such attacks. From when the Morris Worm launched the first, apparently inadvertent, distributed denial-of-service (DDoS) attack on the internet, the realm of cybercrime has expanded from hackers often driven by little more than curiosity, to organised crime and state sponsorship.

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