Virtual Machine Manager (virt-manager in Synaptic)GUI,
Is very similar to VB and user friendly
https://virt-manager.org/
https://access.redhat.com/documentation/enUS/Red_Hat_Enterprise_Linux/6/html/Virtualization_Host_Configuration_and_Guest_Installation_Guide/chap-Virtualization_Host_Configuration_and_Guest_Installation_GuideGuest_Installation_Virt_Manager-Creating_guests_with_virt_manager.html
Depending on how much RAM you have, Virt-manager will work fine on a Lenovo
T400 with a Trisquel Mini as guest with aprox 500 to 700mb of RAM aloctated
to it (more if you have, leaving at least 1Gig to you system)
It's been a while since i last used it, so from memory i installed Qemu, KVM
& Virt-Manager, once the guest installed on your HD (like in VB) you may have
to start it with being root with :
$ sudo virt-manager
Installing debug tools can be usefull it will warn you in the terminal of
possible errors
There is also Aqemu ( Qt5 graphic) , GNOME boxes (GNOME BOXES is quite gready
in ressources).
