This particular feature of Katapult requires that the operating system of the virtual machine in question has the Katapult agent installed and that you have also permitted the automatic updating of SSH keys. This is installed by default on all Katapult provided operating system templates. Should you have installed your own OS then this facility will not function.
When you create a virtual machine you are asked whether you wish to assign all of your users SSH keys or only a select few; however, there may be times when you wish to change the list of SSH keys which can be used to access a given machine. The steps below will assist you in altering this:
The SSH keys will now be updated accordingly. Should a machine be switched off it can take up to five minutes post-boot for any SSH key changes to apply.