You need to run the reboot command with some parameters from an SSH command-line to perform a hard reset.
- SSH into the VMware server.
- Run the following Linux command:
# reboot -n -f
The ESXi host will immediately reboot. This is equivalent to a “hard reset”, meaning you could lose data the same as if you had turned the power off on the server. Proceed with caution and only use when absolutely necessary.