Using vimsh

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List information about a VM
vimsh -n -e “vmsvc/getallvms”

See a summary of the current host configuration
vimsh -n -e “hostsvc/hostsummary”

Enter maintence mode
vimsh -n -e /hostsvc/maintenance_mode_enter

Exit maintence mode
vimsh -n -e /hostsvc/maintenance_mode_exit