VirtualBox error indicating VT-X not enabled in BIOS

Creating a 64 bit Ubuntu VM on Virtual Box results in the following error: VT-x/AMD-V hardware acceleration has been enabled, but is not operational. Your 64-bit guest will fail to detect a 64-bit CPU and will not be able to boot. Please ensure that you have enabled VT-x/AMD-V properly in the BIOS of your host […]

Error installing Ubuntu 64 bit Server on Oracle Virtual Box

When installing Ubuntu or other 64 bit operating system on VirtualBox, you may receive the following error: “This kernel requires an x86-64 CPU, but only detected an i686 CPU. Unable to boot – please use a kernel appropriate for your CPU.” To fix this error, recreate the virtual machine. On the “Create New Virtual Machine” […]

Diagnosing Disk I/O issues in a VPS

Every so often, my Linode goes into a state of apparent frantic I/O. Page loads slow down a bit, and I get regular email alerts indicating a potential problem: Subject: Linode Alert – disk io rate Your Linode, linode90147, has exceeded the notification threshold (800) for disk io rate by averaging 2146.05 for the last […]

GeSHi WordPress Sample with Javascript

The WP-Syntax plugin allows easy insertion of code in blog posts, using GeSHi (Generic Syntax Highlighter). It supposedly supports over one hundred programming languages, including including PHP, HTML, CSS, Java, C, Lisp, XML, Perl, Python, and assembly. For example: 1 2 <pre lang="html" line="1" escaped="true"> </pre> The line=”1″ directive tells WP-Syntax to insert line numbers. […]