First, copy the Update file on the datastore of your ESXi. Thenpower off the virtual machines running on your ESXi.

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$ sudo vim-cmd hostsvc/maintenance_mode_enter

$ sudo esxcli software vib update -d "/vmfs/volumes/Datastore/DirectoryName/PatchName.zip"

$ sudo reboot

$ sudo vim-cmd hostsvc/maintenance_mode_exit

You’re done!