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vi /etc/chrony.conf
server 169.254.169.123 prefer iburst minpoll 4 maxpoll 4
systemctl restart chronyd
chronyc sources -v
210 Number of sources = 1
.-- Source mode '^' = server, '=' = peer, '#' = local clock.
/ .- Source state '*' = current synced, '+' = combined , '-' = not combined,
| / '?' = unreachable, 'x' = time may be in error, '~' = time too variable.
|| .- xxxx [ yyyy ] +/- zzzz
|| Reachability register (octal) -. | xxxx = adjusted offset,
|| Log2(Polling interval) --. | | yyyy = measured offset,
|| \ | | zzzz = estimated error.
|| | | \
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^* 169.254.169.123 3 4 377 11 -5483ns[ -10us] +/- 410us
chronyc tracking
Reference ID : A9FEA97B (169.254.169.123)
Stratum : 4
Ref time (UTC) : Wed Aug 10 03:04:51 2022
System time : 0.000002134 seconds fast of NTP time
Last offset : +0.000002142 seconds
RMS offset : 0.000007061 seconds
Frequency : 2.554 ppm slow
Residual freq : +0.003 ppm
Skew : 0.200 ppm
Root delay : 0.000296080 seconds
Root dispersion : 0.000277362 seconds
Update interval : 16.3 seconds
Leap status : Normal
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