These are the exact commands that are working perfectly for me on a recently
updated RHEL_6.6 system:
service ntpd stop
sleep 5
ntptime -s 0
date -u 063023452015.00
service ntpd start
ntp.conf looks like this
server 127.127.1.1
fudge 127.127.1.1 stratum 1
leapfile /etc/leapseconds
driftfile /var/lib/ntp/drift
/etc/leapseconds looks like this:
2272060800 10 # 1 Jan 1972
2287785600 11 # 1 Jul 1972
2303683200 12 # 1 Jan 1973
2335219200 13 # 1 Jan 1974
2366755200 14 # 1 Jan 1975
2398291200 15 # 1 Jan 1976
2429913600 16 # 1 Jan 1977
2461449600 17 # 1 Jan 1978
2492985600 18 # 1 Jan 1979
2524521600 19 # 1 Jan 1980
2571782400 20 # 1 Jul 1981
2603318400 21 # 1 Jul 1982
2634854400 22 # 1 Jul 1983
2698012800 23 # 1 Jul 1985
2776982400 24 # 1 Jan 1988
2840140800 25 # 1 Jan 1990
2871676800 26 # 1 Jan 1991
2918937600 27 # 1 Jul 1992
2950473600 28 # 1 Jul 1993
2982009600 29 # 1 Jul 1994
3029443200 30 # 1 Jan 1996
3076704000 31 # 1 Jul 1997
3124137600 32 # 1 Jan 1999
3345062400 33 # 1 Jan 2006
3439756800 34 # 1 Jan 2009
3550089600 35 # 1 Jul 2012
3644697600 36 # 1 Jul 2015
ntpd and its arguments looks like this:
ntpd -u ntp:ntp -p /var/run/ntpd.pid -g (note the lack of a "-x" flag)
Here is the output of "ntptime" when run with no arguments at 23:55:
ntptime
ntp_gettime() returns code 1 (INS)
time d93dab0d.0028b2a8 Tue, Jun 30 2015 23:55:57.000, (.000621170),
maximum error 18428 us, estimated error 1 us, TAI offset 35
ntp_adjtime() returns code 1 (INS)
modes 0x0 (),
offset 0.000 us, frequency 13.802 ppm, interval 1 s,
maximum error 18428 us, estimated error 1 us,
status 0x2011 (PLL,INS,NANO),
time constant 6, precision 0.001 us, tolerance 500 ppm,
And finally, this is the output of a perl script that spits out the time every
500ms:
Jun 30 2015 23:59:57.398
Jun 30 2015 23:59:57.898
Jun 30 2015 23:59:58.398
Jun 30 2015 23:59:58.898
Jun 30 2015 23:59:59.398
Jun 30 2015 23:59:59.898
Jun 30 2015 23:59:59.399
Jun 30 2015 23:59:59.899
Jul 01 2015 00:00:00.399
Jul 01 2015 00:00:00.899
Jul 01 2015 00:00:01.399
Jul 01 2015 00:00:01.899
Jul 01 2015 00:00:02.399
Jul 01 2015 00:00:02.899
-chris
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