Hello. I want to install a VM and that VM to install Windows Server 2008.

So my questions are which VM to install for Debian 8?
And how to install Windows Server 2008 on that VM?

All this needs to be done with command lines.
Thank you.

I'd say the most popular virtualization solutions are KVM, Vmware, Xen and Virtualbox. As far as I know, Xen is a bare metal hypervisor and therefore not a candidate for you.

At least KVM and Virtualbox can be controlled through libvirt, which includes the virt-install command for creating a VM and installing an OS on it. I am not sure if Windows can be installed via virt-install. See libvirt.org for documentation.

Virtualbox also has its own set of commands like vboxmanage; see virtualbox.org for documentation.

I don't know about Vmware.

Hello and welcome to LQ.

There are as stated a number of choices. Most will run 2008 server assuming your hardware can support the resources.

Almost every vm can be run from command line. The install for the server OS would need to be set to automatically install. See Technet pages for that.

Otherwise you'd have to have a portable or pre-built "appliance" of server 2008.

probably you need to create a disk image (I hope you have a win2008 DVD) and you can use it inside the VM as a regular DVD. You will see it will look like a normal install.