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Old 11-23-2013, 04:24 PM   #16
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Something you may want to try in /etc/ntp.conf; where the servers are specified, make it look like this (note that you need to be root to do these things):
# NTP server (list one or more) to synchronize with:
#server iburst
Note that three external servers are all you need.

Stop and restart NTPD; i.e.,
/etc/rc.d/rc.ntpd stop
<wait about 30 seconds>
/etc/rc.d/rc.ntpd start
If you run ntpq -pn, you'll see something similar to this (note: if you don't see web addresses in the remote and refid columns you've got a network problem):
ntpq -pn
     remote           refid      st t when poll reach   delay   offset  jitter
*     .LOCL.          10 l    7   64    1    0.000    0.000   0.001       2 u    4   64    1  580.715  -16.742   0.001     2 u    6   64    1  606.655    0.502   0.001    2 u    8   64    0    0.000    0.000   0.001
That indicates that you're synced with the local clock only, which is normal when NTPD is first started or restarted. Wait about five minutes, maybe a little less, and run ntpq -pn again and you should see something similar to this:
ntpq -pn
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================     .LOCL.          10 l  110   64   76    0.000    0.000   0.001
*       2 u   24  128   77  569.475  -12.331   6.628
+   2 u   27   64   77  606.655    0.502  14.329
+    2 u   37   64   37  617.451   -4.439  11.502
The asterisk in column 1 indicate that you're synced with that pool server (you will not have the same internet addresses as shown here, they'll be different). The plus signs indicate that those pool servers are candidates for synchronization if or when the asterisk-marked server goes away or becomes noisy or unstable.

Keep in mind that the NTP daemon needs to have 24/7 internet access to keep your system clock on time; if your network connection goes away, the daemon will simply synchronize to the "LOCL" clock (which is your system clock) until the internet connection comes back. At that time, NTPD will once again synchronize with an external time server.

Finally, if your system clock drifts too much, NTP will not be able to synchronize it (more than about five minutes drift and you won't get synchronization). In that case, you'll want to check the battery on your system motherboard -- it may be fully discharged and you'll need a new one -- or there may be some software adjustments needed to "step adjust" your system clock (that's for another day, though, try the above stuff first).

Hope this helps some.
Old 11-24-2013, 08:26 AM   #17
Registered: Aug 2004
Location: near Marion, Ill
Distribution: Slackware 13.37
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I create a file called settime in cron.daily with the following

/usr/sbin/ntpdate && /sbin/hwclock -w

make it executable (chmod +x) this checks time and updates hardware clock every day. Of course you need to change time server for your locale.


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