after a fresh installation of vRealize Operations Manager 6.6.1 i was not able to connect either to shell console of the appliance or via SSH with root user.
account locked due to x failed logins
to unlock the root user again, proceed as follow
restart the VM appliance.
on the boot loader screen, append the Boot options with the string
press Enter and the appliance will boot automatically into shell.
to change the forgotten root password
give a new password for root access
reboot the VM.
Press ALT+F1 and login again
Finish, root access works again 😉