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RPM: chrony
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# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
server 0.pool.ntp.org iburst
server 1.pool.ntp.org iburst
server 2.pool.ntp.org iburst
# Ignore stratum in source selection.
stratumweight 0
keyfile /etc/chrony/chrony.keys
commandkey 1
# Enable kernel RTC synchronization.
! rtcsync
# In first three updates step the system clock instead of slew
# if the adjustment is larger than 10 seconds.
makestep 10 3
# Stop bad estimates upsetting machine clock.
maxupdateskew 100
# Allow computers on the unrouted nets to use the server.
#allow 10/8
#allow 192.168/16
#allow 172.16/12
# This directive tells chrony to regulate the real-time clock and tells it
# where to store related data. It may not work on some newer motherboards
# that use the HPET real-time clock. It requires enhanced real-time
# support in the kernel.
rtcfile /var/lib/chrony/rtc
# The last line assumes your clock is on UTC time. Remove it if you use local time.
! rtconutc
# Record the rate at which the system clock gains/losses time.
driftfile /var/lib/chrony/drift
# Specify directory for dumping measurements.
dumpdir /var/lib/chrony
# Dump measurements when daemon exits.
dumponexit
logdir /var/log/chrony
# This directive forces `chronyd' to send a message to syslog if it
# makes a system clock adjustment larger than a threshold value in seconds.
logchange 0.5
! noclientlog
log statistics measurements tracking rtc