Xen is one of the newest virtualization platforms available that can securely run multiple virtual guest servers, each running its own operating system, on a single physical system with close to native performance.  It is available on many Linux platforms as an open source application and directly from XenSource Inc. 

After twelve months of increasingly dramatic press headlines about failures to safeguard personal data records, it’s time to assess the size of the issue and identify best practice steps for reducing the incidence of, and damage caused by, these data breaches.
The IT Governance Data Breaches Report identifies that spectacular data breaches, such as the UK’s [...]

The easiest way to learn Linux permissions is from an example. The ls -l command generates a list of contents, such as files along with their permissions. Let’s take a look at the default values for a file called Filename. We are adding spaces to make the output more legible.