ntpd
ntpd [-aAbdgLmnPqx] [-c conffile] [-D level]
[-f driftfile] [-k keyfile] [-l logfile] [-p pidfile]
[-s statsDir] [-t key] [-v variable] [-V variable]
[-N high] [-r broadcastDelay]
Maintains local time-of-day synchronism with time servers.
This documentation is not a detailed description but rather a most commonly used features reference
It seems that neither Mac os nor linux use this daemon
Processes the config file, the command line, or NetInfo .
Use ntpq and ntpdc to query or change options.
| -q | quit after the first time the clock is set (as does ntpdate).-g and -x can be used with this option. Not sufficient to synchronize the clock. | ||||||||||||||||||||||||||||||||||||
| -g | disable sanity i.e. any offset is accepted once, Afterwards the offset must be less then the sanity limit, ( 1000 seconds by default). Used with -q (quit).
| ||||||||||||||||||||||||||||||||||||
| -x | express slew time in all cases, frequently used with -q (quit).Prevents reducing the time which might be required if the system is ahead of the time server. Normally, the time is If the step threshold is set to zero, all offsets are stepped, regardless of value and regardless of the -x option.
Not a good idea as it bypasses the checks to cope with differences. -n | Do Not fork.
| -c conffile | configuration file. (Disable netinfo?)
| -d | debugging mode. multiple times, greater detail of display.
| -D level | debugging level directly. D 9 sample
| -f driftfile | file for drift
| -l logfile | log file. Default: system log facility syslog.
| -s statsdir | statistics directory
| -L | Listen to virtual IPs.
| -b | -m broadcast messages. | use multicast messages on the IP multicast group address 224.0.1.1 -p pidfile | pidfile to record the ntpd's process ID.
| Not Nice priority i.e. higher
| -P | Override the Priority limit set by the operating system.
| -r delay | default propagation delay . if the delay cannot be computed automatically
| -a | Enable authentication mode (default).
| -A | Disable authentication mode.
| -k keyfile | keyfile containing the NTP authentication .
| -t key | trusted key list is appended with | key
|
The list of servers is in: /etc/ntp.conf. For Example: server
pool.ntp.org
Be careful when using a command like:
sudo /usr/sbin/ntpd -g -q -n -x -D 9 |moreWhich disables the sanity check permiting large adjustments and slews to the new time, quits after one update, does not fork and show debugging
Additional gory details can be found in the man page.
/etc/ntp.conf , /etc/ntp.drift , /etc/ntp.keys
ntp.conf, ntpdate, ntpdc, ntpq(8),
sntp (client)
ntp2.rbauman.com (San Jose)
[ntp1][ ntp31
Current Time (UTC):
Reference ID 11FD04FD (ussic2-ntp-002.aaplimg.com)
Stratum 2
Ref time (UTC)Tue Apr 26 16:16:38 2022
System time 0.000006641 seconds slow of NTP time
Last offset -0.000015106 seconds
RMS offset 0.000036191 seconds
Frequency 2.750 ppm slow
Residual freq -0.061 ppm
skew 0.239 ppm
Root delay 0.000855854 seconds
Root dispersion 0.000301458 seconds
Update interval 130.3 seconds
Leap status Normal
Tue Apr 26 16:16:38 2022
MS Name/IP address Stratum Poll Reach LastRx Last sample
ussjc2-ntp-002.aaplimg.c> 1 7 377 105 -10us [ -25us] +/- 600us
time-d-b.nist.gov 1 9 377 474 -519us[ -562us] +/- 15
ntpl.wiktel.com 1 10 726 +1303 +1309 36
ntp3.torix.ca 1 10 179 -3359 -3371 31
tick.usnogps.navy.mil 1
clock.sjc.he.net
clock.fmt.he.net
time.cloudflare.com 3 10
rdnsl.steadfast.net
^? ipv4a.ntpl.rbauman.com
^? ipv6a.ntpl.rbauman.com
ipv4.ntp3.rbauman.com
^? ipv6.ntp3.rbauman.com
37
37°
37
105
474
726
179
626
741
448
527
919
511
116
98
44
113
- 10uS
-25us]
-519us|
-562us1
+1303us[+1309us]
-3359us{-3371us]
+14ms l
+14ms]
-3165us[-3161us]
+143us! +100us]
-101us
-76usl
+1220us[+1235us]
-89us
-63usl
+1136us[+1121us]
+753ns +753n51
+1389us[+1389us]
-187us[ -202us]
16:18:25 up 2 days,
15:34.
load average: 0.16, 0.09, 0.02
Receive 2618 | Transmit 2406 (pkts/s) 8% dropped
Abusers:
40
conntrack: 46167/131072 358
IP: 144.126.151.19
(my-love-date.de)