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| 1 | +# Welcome to the chrony configuration file. See chrony.conf(5) for more |
| 2 | +# information about usable directives. |
| 3 | + |
| 4 | +# Include configuration files found in /etc/chrony/conf.d. |
| 5 | +confdir /etc/chrony/conf.d |
| 6 | + |
| 7 | +# This will use (up to): |
| 8 | +# - 4 sources from ntp.ubuntu.com which some are ipv6 enabled |
| 9 | +# - 2 sources from 2.ubuntu.pool.ntp.org which is ipv6 enabled as well |
| 10 | +# - 1 source from [01].ubuntu.pool.ntp.org each (ipv4 only atm) |
| 11 | +# This means by default, up to 6 dual-stack and up to 2 additional IPv4-only |
| 12 | +# sources will be used. |
| 13 | +# At the same time it retains some protection against one of the entries being |
| 14 | +# down (compare to just using one of the lines). See (LP: #1754358) for the |
| 15 | +# discussion. |
| 16 | +# |
| 17 | +# https://developers.google.com/time/guides?hl=en |
| 18 | +server time1.google.com iburst |
| 19 | +server time2.google.com iburst |
| 20 | +server time3.google.com iburst |
| 21 | +server time4.google.com iburst |
| 22 | + |
| 23 | +# Use time sources from DHCP. |
| 24 | +sourcedir /run/chrony-dhcp |
| 25 | + |
| 26 | +# Use NTP sources found in /etc/chrony/sources.d. |
| 27 | +sourcedir /etc/chrony/sources.d |
| 28 | + |
| 29 | +# This directive specify the location of the file containing ID/key pairs for |
| 30 | +# NTP authentication. |
| 31 | +keyfile /etc/chrony/chrony.keys |
| 32 | + |
| 33 | +# This directive specify the file into which chronyd will store the rate |
| 34 | +# information. |
| 35 | +driftfile /var/lib/chrony/chrony.drift |
| 36 | + |
| 37 | +# Save NTS keys and cookies. |
| 38 | +ntsdumpdir /var/lib/chrony |
| 39 | + |
| 40 | +# Uncomment the following line to turn logging on. |
| 41 | +#log tracking measurements statistics |
| 42 | + |
| 43 | +# Log files location. |
| 44 | +logdir /var/log/chrony |
| 45 | + |
| 46 | +# Stop bad estimates upsetting machine clock. |
| 47 | +maxupdateskew 100.0 |
| 48 | + |
| 49 | +# This directive enables kernel synchronisation (every 11 minutes) of the |
| 50 | +# real-time clock. Note that it can’t be used along with the 'rtcfile' directive. |
| 51 | +rtcsync |
| 52 | + |
| 53 | +# Step the system clock instead of slewing it if the adjustment is larger than |
| 54 | +# one second, but only in the first three clock updates. |
| 55 | +makestep 1 3 |
| 56 | + |
| 57 | +# Get TAI-UTC offset and leap seconds from the system tz database. |
| 58 | +# This directive must be commented out when using time sources serving |
| 59 | +# leap-smeared time. |
| 60 | +leapsectz right/UTC |
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