1chrony.conf(5)                Configuration Files               chrony.conf(5)
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NAME

6       chrony.conf - chronyd configuration file
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SYNOPSIS

10       /etc/chrony.conf
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DESCRIPTION

14       chrony  is  a pair of programs for maintaining the accuracy of computer
15       clocks. chronyd is a background daemon program that can be  started  at
16       boot time.
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18       Assuming that you have found some servers, you need to set up a config‐
19       uration file to run chrony.  The  (compiled-in)  default  location  for
20       this  file  is  /etc/chrony.conf.   Assuming  that your NTP servers are
21       called `foo.example.net', `bar.example.net' and `baz.example.net', your
22       chrony.conf file could contain as a minimum
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24            server foo.example.net
25            server bar.example.net
26            server baz.example.net
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28       However, you will probably want to include some of the other directives
29       described in detail in the documentation supplied with the distribution
30       (chrony.txt  and chrony.texi). The following directives may be particu‐
31       larly useful : `driftfile',  `makestep', `rtcsync'.  Also, the `iburst'
32       server  option  is useful to speed up the initial synchronization.  The
33       smallest useful configuration file would look something like
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35            server foo.example.net iburst
36            server bar.example.net iburst
37            server baz.example.net iburst
38            driftfile /var/lib/chrony/drift
39            makestep 10 3
40            rtcsync
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42       When using a pool of NTP servers (one name is used for multiple servers
43       which  may  change  over  time),  it's  better to specify them with the
44       `pool' directive instead of multiple `server' directives.  The configu‐
45       ration file could in this case look like
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47            pool pool.ntp.org iburst
48            driftfile /var/lib/chrony/drift
49            makestep 10 3
50            rtcsync
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SEE ALSO

54       chronyc(1), chronyd(8)
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56       http://chrony.tuxfamily.org/
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AUTHOR

60       Richard Curnow <rc@rc0.org.uk>
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62       This man-page was written by Jan Schaumann <jschauma@netmeister.org> as
63       part of "The Missing Man Pages Project".   Please  see  http://www.net‐
64       meister.org/misc/m2p2/index.html for details.
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66       The complete chrony documentation is supplied in texinfo format.
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71chrony 2.1.1                       June 2015                    chrony.conf(5)
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