Virtual-Machine

Running vagrant destroy sometimes fails with: VBoxManage: error: Cannot unregister the machine 'CnC_default_1643660523119_45689' while it is locked The VM is locked because a VirtualBox process is still holding onto it. Kill the headless process and try again: killall -9 VBoxHeadless && vagrant destroy killall -9 VBoxHeadless force-kills any running VirtualBox headless instances. The && runs vagrant destroy only if that succeeds.

I put together this document as a reference for system hardening. It covers the basics – what hardening actually means, the formula for building a hardened system, and how virtualisation changes the picture. You can download the full guide as a Word document. What is System Hardening? Hardening is just the practice of making a system more resistant to attack. The guiding idea is least privilege: only what’s needed runs, only what’s needed is exposed. ...

A friend sent me a VMware image of Ubuntu 11.04 Alpha 1, so I’m sharing it here in case anyone wants to try the new release without installing it. The image is a fresh install with GNOME on a 64-bit system. VMware Tools are included, and it was built on VMware Workstation 7.1.2 (build 301548) under Windows. No software updates have been applied, so it’s a clean snapshot of the alpha as it shipped. ...