Upgrade ESXi

1. Put your host into maintenance mode
2.ssh into the ESXi host and issue the following command
3. copy the upgrade patch(.zip ) folder to data store
4. Run esxcli software vib install -d /vmfs/volumes/57ab3373-3d906d0f-b181-002590d3fd56/ISO/VMware-ESXi-6.5.0-4564106-depot.zip