ntp
Check NTP status :
ntpdc -c sysinfo
system peer: 0.0.0.0
system peer mode: unspec
leap indicator: 11
stratum: 16
precision: -20
root distance: 0.00000 s
root dispersion: 14.05795 s
reference ID: [73.78.73.84]
reference time: 00000000.00000000 Thu, Feb 7 2036 7:28:16.000
system flags: auth monitor ntp kernel stats
jitter: 0.000000 s
stability: 0.000 ppm
broadcastdelay: 0.003998 s
authdelay: 0.000000 s
See how far cloeck is from ref :
cat /var/lib/ntp/ntp.drift
37.323
Show synchronization status with all peers :
ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
213.152.31.67 .INIT. 16 u - 1024 0 0.000 0.000 0.000
Force immediate resync :
/etc/init.d/ntp stop
ntpdate -u time.nomblot.org
/etc/init.d/ntp start