La fecha y la hora se han configurado para que sean automáticas y, sin embargo, la hora de mi computadora portátil está 5 minutos por delante de lo que debería ser.
OS: El Capitán 10.11.3
Modelo: Macbook Pro Retina 13 "(Edición 2015)
¿Cómo soluciono esto?
Si ni la agrupación ntp ni el time.apple.com son aptos o accesibles desde la red que utiliza, es posible que tenga que recurrir a la configuración manual de su reloj. Una vez que esté dentro de los 15 segundos de tiempo, intente nuevamente la opción de la línea de comandos y configúrela de forma automática.
También, cuando puede probar una red diferente o VPN a un servidor en un geo diferente que pueda ayudar a solucionar los problemas de red locales para usted.
A partir de esta pregunta en Pregunte a Ubuntu, es muy probable que su ISP esté bloqueando el puerto 123, que ntp debe funcionar.
También puede obtener una buena fecha de servidor desde curl:
curl -I http://www.apple.com 2>/dev/null | grep ^Date:
Si desea analizar eso y establecer la fecha, sería una solución fácil para una corrección de una sola vez o un alias que podría ejecutar periódicamente en la línea de comandos. Para depurar las cosas correctamente, aquí está el comando que usaría:
ntpdate -vd time.apple.com
Le mostrará los paquetes que se están enviando y recibiendo y luego una explicación detallada de cómo se modifica la hora de esta manera:
$ ntpdate -vd time.apple.com
21 Feb 13:12:49 ntpdate[17139]: ntpdate [email protected] Fri May 28 01:20:57 UTC 2010 (1)
Looking for host time.apple.com and service ntp
host found : jptyo5-ntp-002.aaplimg.com
transmit(17.253.68.253)
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server 17.253.68.253, port 123
stratum 1, precision -20, leap 00, trust 000
refid [GPSs], delay 0.19341, dispersion 0.00044
transmitted 4, in filter 4
reference time: da748aad.d730f54c Sun, Feb 21 2016 13:12:45.840
originate timestamp: da748ab2.b8b599ea Sun, Feb 21 2016 13:12:50.721
transmit timestamp: da748ab2.a3ff151e Sun, Feb 21 2016 13:12:50.640
filter delay: 0.19453 0.19344 0.19341 0.19354
0.00000 0.00000 0.00000 0.00000
filter offset: -0.00252 -0.00223 -0.00296 -0.00309
0.000000 0.000000 0.000000 0.000000
delay 0.19341, dispersion 0.00044
offset -0.002966
server 17.253.84.253, port 123
stratum 1, precision -20, leap 00, trust 000
refid [GPSs], delay 0.24779, dispersion 0.00063
transmitted 4, in filter 4
reference time: da748ab2.077fa659 Sun, Feb 21 2016 13:12:50.029
originate timestamp: da748ab3.1f69b486 Sun, Feb 21 2016 13:12:51.122
transmit timestamp: da748ab3.000ebedf Sun, Feb 21 2016 13:12:51.000
filter delay: 0.24779 0.24857 0.24857 0.24823
0.00000 0.00000 0.00000 0.00000
filter offset: 0.011965 0.011501 0.011355 0.011109
0.000000 0.000000 0.000000 0.000000
delay 0.24779, dispersion 0.00063
offset 0.011965
server 17.253.14.253, port 123
stratum 1, precision -20, leap 00, trust 000
refid [GPSs], delay 0.06609, dispersion 0.00035
transmitted 4, in filter 4
reference time: da748aaa.d5225db1 Sun, Feb 21 2016 13:12:42.832
originate timestamp: da748ab2.af170bf9 Sun, Feb 21 2016 13:12:50.683
transmit timestamp: da748ab2.a8bec679 Sun, Feb 21 2016 13:12:50.659
filter delay: 0.06775 0.06786 0.06865 0.06609
0.00000 0.00000 0.00000 0.00000
filter offset: 0.005122 0.004585 0.004944 0.004527
0.000000 0.000000 0.000000 0.000000
delay 0.06609, dispersion 0.00035
offset 0.004527
server 17.253.54.251, port 123
stratum 1, precision -20, leap 00, trust 000
refid [GPSs], delay 0.14940, dispersion 0.00041
transmitted 4, in filter 4
reference time: da748aac.bdf434ff Sun, Feb 21 2016 13:12:44.742
originate timestamp: da748ab3.2c5f6146 Sun, Feb 21 2016 13:12:51.173
transmit timestamp: da748ab3.1af31b15 Sun, Feb 21 2016 13:12:51.105
filter delay: 0.14940 0.14998 0.15178 0.15584
0.00000 0.00000 0.00000 0.00000
filter offset: 0.004575 0.004469 0.005269 0.002918
0.000000 0.000000 0.000000 0.000000
delay 0.14940, dispersion 0.00041
offset 0.004575
server 17.253.38.253, port 123
stratum 1, precision -22, leap 00, trust 000
refid [GPSs], delay 0.17906, dispersion 0.00018
transmitted 4, in filter 4
reference time: da748aaf.ba3c03ed Sun, Feb 21 2016 13:12:47.727
originate timestamp: da748ab3.7ab88eb4 Sun, Feb 21 2016 13:12:51.479
transmit timestamp: da748ab3.65d5b24e Sun, Feb 21 2016 13:12:51.397
filter delay: 0.17940 0.18303 0.18025 0.17906
0.00000 0.00000 0.00000 0.00000
filter offset: 0.004901 0.006247 0.004883 0.004856
0.000000 0.000000 0.000000 0.000000
delay 0.17906, dispersion 0.00018
offset 0.004856
server 17.253.12.253, port 123
stratum 1, precision -20, leap 00, trust 000
refid [GPSs], delay 0.07823, dispersion 0.00056
transmitted 4, in filter 4
reference time: da748ab2.71e94c76 Sun, Feb 21 2016 13:12:50.444
originate timestamp: da748ab3.52ca2f7d Sun, Feb 21 2016 13:12:51.323
transmit timestamp: da748ab3.4aa5a469 Sun, Feb 21 2016 13:12:51.291
filter delay: 0.07823 0.07959 0.07927 0.07938
0.00000 0.00000 0.00000 0.00000
filter offset: 0.004089 0.004683 0.004710 0.004907
0.000000 0.000000 0.000000 0.000000
delay 0.07823, dispersion 0.00056
offset 0.004089
server 17.253.4.253, port 123
stratum 1, precision -20, leap 00, trust 000
refid [GPSs], delay 0.08247, dispersion 0.00029
transmitted 4, in filter 4
reference time: da748ab2.9c86971f Sun, Feb 21 2016 13:12:50.611
originate timestamp: da748ab3.89a4a287 Sun, Feb 21 2016 13:12:51.537
transmit timestamp: da748ab3.811904b3 Sun, Feb 21 2016 13:12:51.504
filter delay: 0.08247 0.08354 0.08432 0.08316
0.00000 0.00000 0.00000 0.00000
filter offset: 0.004894 0.005381 0.005089 0.004592
0.000000 0.000000 0.000000 0.000000
delay 0.08247, dispersion 0.00029
offset 0.004894
server 17.253.34.253, port 123
stratum 1, precision -20, leap 00, trust 000
refid [GPSs], delay 0.14059, dispersion 0.00099
transmitted 4, in filter 4
reference time: da748ab2.20438b82 Sun, Feb 21 2016 13:12:50.126
originate timestamp: da748ab3.f3cda148 Sun, Feb 21 2016 13:12:51.952
transmit timestamp: da748ab3.e449ba5e Sun, Feb 21 2016 13:12:51.891
filter delay: 0.14117 0.14233 0.15315 0.14059
0.00000 0.00000 0.00000 0.00000
filter offset: 0.002630 0.002604 0.008246 0.003099
0.000000 0.000000 0.000000 0.000000
delay 0.14059, dispersion 0.00099
offset 0.003099
server 17.253.6.253, port 123
stratum 1, precision -20, leap 00, trust 000
refid [GPSs], delay 0.06593, dispersion 0.00092
transmitted 4, in filter 4
reference time: da748ab0.6e7f416f Sun, Feb 21 2016 13:12:48.431
originate timestamp: da748ab3.e2b4f880 Sun, Feb 21 2016 13:12:51.885
transmit timestamp: da748ab3.dc14940b Sun, Feb 21 2016 13:12:51.859
filter delay: 0.06708 0.07036 0.06593 0.06798
0.00000 0.00000 0.00000 0.00000
filter offset: 0.004849 0.005614 0.003835 0.004670
0.000000 0.000000 0.000000 0.000000
delay 0.06593, dispersion 0.00092
offset 0.003835
server 17.253.2.253, port 123
stratum 1, precision -20, leap 00, trust 000
refid [GPSs], delay 0.06876, dispersion 0.00075
transmitted 4, in filter 4
reference time: da748aaf.90dc62bd Sun, Feb 21 2016 13:12:47.565
originate timestamp: da748ab4.18d780e7 Sun, Feb 21 2016 13:12:52.097
transmit timestamp: da748ab4.11df43c7 Sun, Feb 21 2016 13:12:52.069
filter delay: 0.06931 0.06876 0.07674 0.06888
0.00000 0.00000 0.00000 0.00000
filter offset: 0.005531 0.005830 0.001524 0.005548
0.000000 0.000000 0.000000 0.000000
delay 0.06876, dispersion 0.00075
offset 0.005830
server 17.253.52.253, port 123
stratum 1, precision -20, leap 00, trust 000
refid [GPSs], delay 0.14632, dispersion 0.00113
transmitted 4, in filter 4
reference time: da748ab2.061595ca Sun, Feb 21 2016 13:12:50.023
originate timestamp: da748ab4.97b9bf94 Sun, Feb 21 2016 13:12:52.592
transmit timestamp: da748ab4.871cfbb9 Sun, Feb 21 2016 13:12:52.527
filter delay: 0.14799 0.14728 0.14632 0.14771
0.00000 0.00000 0.00000 0.00000
filter offset: 0.003221 0.003651 0.002333 0.003804
0.000000 0.000000 0.000000 0.000000
delay 0.14632, dispersion 0.00113
offset 0.002333
server 17.253.26.253, port 123
stratum 1, precision -20, leap 00, trust 000
refid [GPSs], delay 0.08757, dispersion 0.00072
transmitted 4, in filter 4
reference time: da748ab2.e54f6304 Sun, Feb 21 2016 13:12:50.895
originate timestamp: da748ab4.8e9150ca Sun, Feb 21 2016 13:12:52.556
transmit timestamp: da748ab4.8569e3c9 Sun, Feb 21 2016 13:12:52.521
filter delay: 0.08926 0.08757 0.08945 0.08951
0.00000 0.00000 0.00000 0.00000
filter offset: 0.005532 0.004636 0.005372 0.003800
0.000000 0.000000 0.000000 0.000000
delay 0.08757, dispersion 0.00072
offset 0.004636
server 17.253.24.253, port 123
stratum 1, precision -19, leap 00, trust 000
refid [GPSs], delay 0.04640, dispersion 0.00031
transmitted 4, in filter 4
reference time: da748aac.fbc2a34e Sun, Feb 21 2016 13:12:44.983
originate timestamp: da748ab4.9e9d94bb Sun, Feb 21 2016 13:12:52.619
transmit timestamp: da748ab4.9a957470 Sun, Feb 21 2016 13:12:52.603
filter delay: 0.05292 0.04898 0.04640 0.04791
0.00000 0.00000 0.00000 0.00000
filter offset: 0.005614 0.004655 0.004368 0.004577
0.000000 0.000000 0.000000 0.000000
delay 0.04640, dispersion 0.00031
offset 0.004368
server 17.253.20.253, port 123
stratum 1, precision -22, leap 00, trust 000
refid [GPSs], delay 0.07130, dispersion 0.00035
transmitted 4, in filter 4
reference time: da748ab1.90646e72 Sun, Feb 21 2016 13:12:49.564
originate timestamp: da748ab4.e674782a Sun, Feb 21 2016 13:12:52.900
transmit timestamp: da748ab4.df764f11 Sun, Feb 21 2016 13:12:52.872
filter delay: 0.07245 0.07431 0.07130 0.07147
0.00000 0.00000 0.00000 0.00000
filter offset: 0.005126 0.005608 0.004607 0.004382
0.000000 0.000000 0.000000 0.000000
delay 0.07130, dispersion 0.00035
offset 0.004607
21 Feb 13:12:52 ntpdate[17139]: adjust time server 17.253.24.253 offset 0.004368 sec
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