Thanks Karand, indeed that is it.
test@ex9204-core2-re0> request vmhost ? Possible completions: cleanup RE vmhost cleanup /var/tmp, /var/crash and /var/log file-copy Copy file from vmhost to vjunos halt Halt the software on RE hard-disk-test Run smartd self tests on hard disks power-off Power off the software on RE power-on Power on the system reboot Reboot RE vmhost snapshot Create a vmhost recovery snapshot software Perform vmhost software extension or upgrade zeroize Erase all data, including configuration and log files