How to install virt-manager in Mint 22/Ubuntu 22
Step 1.) Install virt-manager
sudo apt install virt-manager
Step 2.) Start libvirtd
sudo systemctl start libvirtd
sudo systemctl enable libvirtd
Step 3.) Permissions
Your user needs access to libvirt and kvm or it won't work without running as sudo.
sudo usermod -a -G kvm yourusername
sudo usermond -a -G libvirt yourusername........
virt-resize: error: libguestfs error: could not create appliance through libvirt.
This is caused because the user is running as qemu for virt-resize and if qemu does not have privileges to read from the source and write to the destination, it will fail with the below. So either change the uid of qemu or change the ownership of the source and target.
Solution:
export LIBGUESTFS_BACKEND=direct
virt-resize --expand /dev/sda2 /root/kvmtemplates/windows2019-eval-template.img /root/kvmguests/kvmkvmuser4515........