In my research about update mechanism of open-source software I found vulnerabilities in Oracle's VirtualBox. It's possible to compromise a system behind a firewall by infiltrating the updates of Extension-Packs.
I tried to create an Ubuntu-container on my Debian Jessie Server and I got the following error-message:
Today I wanted to copy a disk-image to a Virtualbox-disk(VDI) using dd. In this article I am going to describe how I managed to access the disk from the Linux command-line, copied the image and mounted a VDI-disk-partition
LXC-Containers are very useful. They are more leightweight than virtual machines and not as static as docker-containers. That's why I like them especially for my server environments. In this article I will show a very basic setup of LXC-Containers on Debian Jessie.
I really like BTRFS, that's why I write so much about it. But there are some issues with it. BTRFS is based on the copy-on-write principle but this can create some real troubles with virtualisation or databases. Therefore I will explain in this article how to disable cow.
qemu-img resize /var/lib/libvirt/images/server.qcow2 +50GB