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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 see Network section 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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