chrony/README



    1 README for chrony 1.20
    2 
    3 REQUIREMENTS
    4 
    5 PRE-INSTALL
    6 
    7 POST-INSTALL
    8 
    9 Add up to eight time server of your country to /etc/chrony.conf.
   10 A list of public servers can be found here:
   11 
   12   http://www.eecis.udel.edu/~mills/ntp/clock1a.html
   13   http://www.eecis.udel.edu/~mills/ntp/clock2a.html
   14 
   15 
   16 PRECAUTION
   17 
   18 Remove the both '/sbin/hwclock ...' entries from /etc/rc.shutdown 
   19 and /etc/rc. No other software should manipulate the system hardware 
   20 clock if chronyd is running.
   21 
   22 
   23 Chrony is a pure Network time protocol (NTP) server, that mean it
   24 provides it's services on port 123/UDP. Utilities like rdate uses
   25 the time protocol on port 37/TCP. To use rdate with chrony you must 
   26 add the following line to the /etc/inetd.conf of your chrony server 
   27 and run inetd:
   28 
   29   time   stream   tcp   nowait   root   internal
   30 
   31 To avoid this, I recommend the use of the NTP utility msntp to sync 
   32 your clients with your chrony server or better run chrony on all of 
   33 your clients. 
   34 
   35 The start script /etc/rc.d/chronyd has a online and a offline option. 
   36 Use this in your ip-up/ip-down scripts to tell chrony whether we are 
   37 online or offline.