NethServer Version: NethServer release 7.3.1611
Module: KVM
I don´t have the option to create a virtual disk or something… i think it has something to do with the fileformat i used to install nethserver… is that correct?
What option should i use? LVM? Should i leave some space with no partition?
My only experience is with HyperV… any other suggestion? 
text/howto to read?
Another question, can i install Oracle Linux in a VM? Anyone with this experience?
I don’t think so, WebVirt should allow to create any type of disk.
Ad first step, create a connection to the localhost if there isn’t one.
Then WebVirt will connect to the local libvirtd daemon and let you create new vms.
See also: http://retspen.github.io/
Will try this later, but good to know! I was afraid to create another connection becouse of this:
Do not create network bridges using WebVirtManager interface. Just create the bridge inside Network page and use it under WebVirtManager.