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The hosts synchronize the time with both NTP and PTP. This is done by the timemaster service during the network configuration section. (see TO REMOVED section).
Three tools are used:

• chrony synchronize the system clock with NTP. The NTP server can be configured to be on the local network or on the internet.

• ptp4l synchronize the hardware clock (PHC) with PTP.

• phc2sys synchronize hardware and system clocks.

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