Fgt-vm64-kvm-v6-build1010-fortinet.out.kvm.qcow2: Download

The filename Fgt-vm64-kvm-v6-build1010-fortinet.out.kvm.qcow2 gives us several clues about its nature:

Ensure you have the necessary packages:

sudo apt update
sudo apt install qemu-kvm libvirt-daemon-system virt-manager bridge-utils

Once you obtain a genuine image (e.g., FGT_VM64_KVM-v6-build1010-FORTINET.out.kvm.qcow2.zip): Fgt-vm64-kvm-v6-build1010-fortinet.out.kvm.qcow2 Download