A blog about Ruby, Rails and other Tech. Mostly.
Back to blog
ntpdate - no server suitable for synchronization found (3)
I've previously reported on a reason why you might get the message "no server suitable for synchronization found" from ntpdate.
Well I just received some correspondence from David Gessel who had a different cause for the message. I will quote from his letter to me:
If you are on a busy or remote network, this is probably the first thing to try. Thanks David!
ntpdate -b -p 8 and got
no server suitable for synchronization found
Searching I found someone suggesting that the problem was related to
network saturation so I tried
ntpdate -b -t 4 -p 4 and got
step time server 220.127.116.11 offset 0.166414 sec
- just right. I edited my init.d/ntpd file to read
if [ -s "$ntpstep" -o -n "$dostep" ]; then
# Synchronize with servers if step-tickers exists
# or the -x option is used
echo -n $"$prog: Synchronizing with time server: "
/usr/sbin/ntpdate -s -b -t 4 -p 4 $tickers
[ $RETVAL -eq 0 ] && success || failure
if [ $RETVAL -ne 0 ]; then
-t 4 sets the timeout to 4 seconds (from 1, "suitable for LAN
applicatons") and -p 8 sets the number of averaged samples back to the
default, RH9 at least sets the larger number of averages, but with the
longer time out you could in theory be waiting 32 seconds. After the
initial ntpdate config, everything will sync up with ntpq which defaults
to 5000 msec.
Back to blog