virt-manager error: Failed to start network default error: Unable to create bridge virbr0: Package not installed

$ sudo virsh net-start default
error: Failed to start network default error: Unable to create bridge virbr0: Package not installed

Or turn on the VM using virt-manager:

Error starting domain: Requested operation is not valid: network 'default' is not active

Solution

Enable libvirtd to start with the system.

systemctl enable libvirtd
reboot

HVN at http://pymi.vn and https://www.familug.org.

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