kexec-ok
A map of ssh public keys to install for the root user
Allows the machine agent to call kexec to switch boot environments as long as the machine is currently running Linux, and the new environment has a template named 'kexec' that contains the kernel, initrds, and command line to use. This can be used to speed up deployments of systems that support kexec.
Note
Not all Linux kernels/distros ship with kexec support enabled. Check your distro for compatibility.