6.5.1

Table Of Contents
Use VMware Tools Time Synchronization
You can set up the vCenter Server Appliance to use VMware Tools time synchronization.
Procedure
1 Access the appliance shell and log in as a user who has the administrator or super administrator role.
The default user with super administrator role is root.
2 Run the command to enable VMware Tools time synchronization.
timesync.set --mode host
3 (Optional) Run the command to verify that you successfully applied the VMware Tools time
synchronization.
timesync.get
The command returns that the time synchronization is in host mode.
The time of the appliance is synchronized with the time of the ESXi host.
Add or Replace NTP Servers in the vCenter Server Appliance Configuration
To set up the vCenter Server Appliance to use NTP-based time synchronization, you must add the NTP
servers to the vCenter Server Appliance configuration.
Procedure
1 Access the appliance shell and log in as a user who has the administrator or super administrator role.
The default user with super administrator role is root.
2 Add NTP servers to the vCenter Server Appliance configuration by running the ntp.server.add
command.
For example, run the following command:
ntp.server.add --servers IP-addresses-or-host-names
Here IP-addresses-or-host-names is a comma-separated list of IP addresses or host names of the
NTP servers.
This command adds NTP servers to the configuration. If the time synchronization is based on an NTP
server, then the NTP daemon is restarted to reload the new NTP servers. Otherwise, this command
just adds the new NTP servers to the existing NTP configuration.
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