Clicking "Launch Remote Viewer" will download a .vv file and launch Remote Viewer.

Remote Viewer is available for most operating systems. To install it, search for it in GNOME Software or run the following:

• RHEL, CentOS: 

  sudo yum install virt-viewer
• Fedora: 

  sudo dnf install virt-viewer
• Ubuntu, Debian: 

  sudo apt-get install virt-viewer
• Windows: 

  Download the MSI from virt-manager.org