Make windows of a VirtualBox guest system native to the host system with Seamless mode

VirtualBox offers a feature that let's you treat windows opened in the running guest system almost as is they were native to the host system - you can drag them around on the host system, copy and paste texts between the system and only see the host's desktop while doing so: (Windows 8 Release Preview ... Read more

Establish shared folders between VirtualBox and host system

Virtualbox, as most other virtualisation technologies, provides a service to establish shared folders between the host system and the virtualbox guest OS. For that, you need to install the Virtualbox guest additions. To do so on virtual desktops, just open the Devices menu and select Install guest additions.... Mount the CD and proceed like you ... Read more

Enable USB Support In Virtualbox (Ubuntu)

Enabling USB Support in Virtualbox means to be able to access USB drives plugged into your physical machine on your virtual machines. To accomplish this, you first need to download the newest version of Virtualbox (4.1.8 at the time of this writing), which is not available in the Ubuntu repositories but on the Virtualbox homepage: ... Read more

How to solve the PHP XCache error: /dev/zero: No space left on device

If you get the error "/dev/zero: No space left on device" in the apache error.log on a OpenVZ virtual machine, then the shared memory size in the xcache.ini is too high or the xcache.mm_path is set wrong. Edit the file /etc/php5/conf.d/xcache.ini vi /etc/php5/conf.d/xcache.ini and check the mm_path. On a OpenVZ virtual machine it should be ... Read more

Secure /tmp and /dev/shm directories in a OpenVZ enviroment

The /tmp and /dev/shm directories of a OpenVZ virtual machine shall be mounted without suid and exec permissions. To achieve this, create a a shell script on the host server for every virtual machine which contains the commands to remount the directories. This script will be started automatically by openvz when the VM is started. ... Read more

Backing up OpenVZ virtual machines with vzdump

Vzdump is a perl script that makes live backups of OpenVZ virtual machines very easy. The following steps are for Debian Linux but vzdump can be used on all other linux distributions. Only the installation may vary. Download and install vzdump from http://download.openvz.org/contrib/utils/vzdump/ cd /tmp wget http://download.openvz.org/contrib/utils/vzdump/vzdump_1.1-2_all.deb dpkg -i vzdump_1.1-2_all.deb Create the backup directory mkdir ... Read more

VMware Workstation and Device/Credential Guard are not compatible. VMware Workstation can be run after disabling Device/Credential Guard.

The problem VMware Workstation and Device/Credential Guard are not compatible. VMware Workstation can be run after disabling Device/Credential Guard. Description This is because Hyper-V is also enabled. Disable Hyper-V hypervisor by following the solution listed below. Solution - Open command prompt with elevated privileges and run the following command -bcdedit /set hypervisorlaunchtype off -Restart the ... Read more