Installing Docker CE on Ubuntu

Docker CE – a software platform for deploying applications, packaging applications into a container, adding libraries and all the necessary dependencies to run the application, which allows you to quickly launch the code in almost any environment. There is a free version of Docker Community Edition (CE) and Enterprise Edition (EE). For an example I’ll […]

Installing oVirt

oVirt — virtualization management system. On the test, I will install oVirt in CentOS 7. First of all, let’s add an official repository: Update the packages: It is desirable to reboot the system if the kernel was updated: Install the oVirt Engine and all dependencies: This completes the installation of the oVirt Engine and you […]

Why Hyper-V virtual machines are not always available over the network

Suppose the server has one network card and in network connections it can be seen as “Ethernet”, but after adding the Hyper-V role, a virtual switch vEthernet (…) is created. Virtual machines can be seen from other computers but can not be seen from the local. Therefore, for virtual machines to be accessible from the […]

Solving the error of “Interface (‘VirtualBox Host-Only Ethernet Adapter’) is not a Host-Only Adapter interface”

I noticed once in VirtualBox when starting a virtual machine the following error: Interface (‘VirtualBox Host-Only Ethernet Adapter’) is not a Host-Only Adapter interface (VERR_INTERNAL_ERROR). As it turned out in the device manager of the system and in network connections for some reason, the network interface disappeared “VirtualBox Host-Only Network” For this, the easiest and […]

Solution of VirtualBox error “Kernel driver not installed (rc=-1908)”

I noticed somehow an error in VirtualBox working on Linux Ubuntu Desktop 16.04: Kernel driver not installed (rc=-1908) The VirtualBox Linux kernel driver (vboxdrv) is either not loaded or there is a permission problem with /dev/vboxdrv. Please install virtualbox-dkms package and load the kernel module by executing ‘modprobe vboxdrv’ as root. If it is available […]

The solution to the error “Virtual machine could not be started because the hypervisor is not running”

I noticed once on one HP server, after installing Hyper-V, that virtual workstations are not being launched, giving the following error: Hyper-V Manager An error occurred while attempting to start the selected virtual machine(s). … Virtual machine could not be started because the hypervisor is not running. … As it turned out, the problem was […]

How to fix error VirtualBox “Unable to boot – please use a kernel appropriate for your CPU”

After running the virtual system in VirtualBox, I noticed the following error: This kernel requires the following features not present on the CPU: pae Unable to boot – please use a kernel appropriate for your CPU. The error can be solved in several ways: Method 1) When you turn on the computer, go into the […]