Scenario: you are using a remote host as a virtualization host with libvirt and you want to manage it via ”Virtual machine manager” (virt-manager) over SSH.
But SSH is listening on a non-standard port, and virt-manager does not offer you to connect to a remote libvirt instance on a non-standard port.
Fear not, the option to connect to your libvirt command is just this command away:
virt-manager -c 'qemu+ssh://root@:/system?socket=/var/run/libvirt/libvirt-sock'
(make sure to have passwordless login to the remote host already setup, for example with SSH keys).
Plus note: you can install virt-manager even on macOS (obviously only remote support) with homebrew-virt-manager