# List all Virtual Machine.
virsh list --all

# Start Virtual Machine.
virsh start <vm_name>

# Shutdown Virtual Machine.
virsh shutdown <vm_name>

# Reboot Virtual Machine.
virsh reboot <vm_name>

# Create template Only.
qemu-img create -o preallocation=metadata -f qcow2 /var/lib/libvirt/images/debian-10-test.qcow2 20G 
chown libvirt-qemu:kvm /var/lib/libvirt/images/debian-10-test.qcow2 
chmod 600 /var/lib/libvirt/images/debian-10-test.qcow2

# Graphical View. Install with Macvtap 
virt-install --name=debian-10-test --vcpu=2 --ram=1024 --disk size=20 \ 
--graphics type=spice --video model.type=virtio,clearxml=yes --sound model=default \ --cdrom=/var/lib/libvirt/images/pool/debian-10.11.0-amd64-netinst.iso \
--network  type=direct,source=eno1,source.mode=bridge,model.type=e1000e,address.type=pci

# Graphical View install with NAT.
virt-install --name=debian-10-test --vcpu=2 --ram=1024 --disk size=20 \
--graphics type=spice --video model.type=virtio,clearxml=yes --sound model=default \ --cdrom=/var/lib/libvirt/images/pool/debian-10.11.0-amd64-netinst.iso

# Only Single installation Virtual Machine View.
virt-viewer -c qemu+ssh://root@192.168.100.90/system --domain-name vm_name

# Resize Virtual Machine Disk.
Note: Please shutdown before increase the disk size.
1. virsh list ---------------------- ( List Your VM)
2. virsh shutdown vm_name ------------------ (Select VM to shutdown)
3. virsh domblklist debian11 ------------------ (List Disk Path info of selected VM)
4. qemu-img info /var/lib/libvirt/images/debian11.qcow2 -------------------- (Get Disk Info)
5. qemu-img resize  /var/lib/libvirt/images/debian11.qcow2 +20G ------------------ (Resize the disk of VM)
6. cp /var/lib/libvirt/images/debian-11.qcow2  /var/lib/libvirt/images/debian-11-orig.qcow2
7. virt-filesystems --long --parts --blkdevs -h -a /var/lib//libvirt/images/debian-11.qcow2
8. virt-resize --expand /dev/vda1 /var/lib/libvirt/images/debian-11-orig.qcow2 /var/lib/libvirt/images/debian-11.qcow2
9. qemu-img info /var/lib/libvirt/images/debian11.qcow2 -------------------- (Get Disk Info agian)
10. virt-filesystems --long --parts --blkdevs -h -a /var/lib//libvirt/images/debian-11.qcow2
11. virsh start debian11 --------------- (Start the VM)





# Increase vcpus.
virsh setvcpus debian10 --count 2 --config

#Increase memory
virsh dominfo debian10
virsh setmaxmem debian10 --size 2097152 --config
virsh setmem debian10 --size 2097152 --config
Note – Convert the size from gigabyte to kilobyte

# Add Network Interface

Type - Macvtap
virsh attach-interface --domain debian-10-lvm --type direct --source eno1 --model e1000e --config --live

Type – NAT
virsh attach-interface --domain debian-10-lvm --type network --source default --model virtio --config --live

# Clone Virtual Machine
virt-clone -o debian-10-test -n debian-10-test-new1 -f /var/lib/libvirt/images/debian-10-test-new1.qcow2 --check all=off --check path_in_use=off --replace