k829king wrote:What is the command line for qemu-system-gui ?
The GTK window provided by that package is the default unless you specify a viewer.
k829king wrote:Is it the same thing as when you click Open from the Virtual Machine Manager ( virt-manager) ?
No idea, I don't use virt-manager. That interface is off-topic for this thread.
k829king wrote:Are there alternative ways to access the VM
Yes, read the OP.