尝试configuration我的Ubuntu服务器与pool.ntp.org同步。 遵循本指南https://help.ubuntu.com/community/UbuntuTime 。
我已经configuration我的ntp.conf如下
cat /etc/ntp.conf # /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help driftfile /var/lib/ntp/ntp.drift # Enable this if you want statistics to be logged. statsdir /var/log/ntpstats/ statistics loopstats peerstats clockstats filegen loopstats file loopstats type day enable filegen peerstats file peerstats type day enable filegen clockstats file clockstats type day enable # You do need to talk to an NTP server or two (or three). server 0.north-america.pool.ntp.org server 1.north-america.pool.ntp.org server 2.north-america.pool.ntp.org server 3.north-america.pool.ntp.org # Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for # details. The web page <http://support.ntp.org/bin/view/Support/AccessRestrictions> # might also be helpful. # # Note that "restrict" applies to both servers and clients, so a configuration # that might be intended to block requests from certain clients could also end # up blocking replies from your own upstream servers. # By default, exchange time with everybody, but don't allow configuration. restrict -4 default kod notrap nomodify nopeer noquery restrict -6 default kod notrap nomodify nopeer noquery # Local users may interrogate the ntp server more closely. restrict 127.0.0.1 restrict ::1 # Clients from this (example!) subnet have unlimited access, but only if # cryptographically authenticated. #restrict 192.168.123.0 mask 255.255.255.0 notrust # If you want to provide time to your local subnet, change the next line. # (Again, the address is an example only.) #broadcast 192.168.123.255 # If you want to listen to time broadcasts on your local subnet, de-comment the # next lines. Please do this only if you trust everybody on the network! #disable auth #broadcastclient 然后我把系统更新到了很远的地方
date -s "2 OCT 2006 18:00:00"
并试图重新启动ntpd，时间仍然是2006年。
ntpq --peers; date remote refid st t when poll reach delay offset jitter ============================================================================== dev1-c.sje007.i 209.81.9.7 2 b 48 64 177 80.623 1205991 1100914 ox.eicat.ca 139.78.135.14 2 b 18 64 377 24.743 1205991 1019249 ntp1.Housing.Be 169.229.128.214 3 b 62 64 177 94.714 -5.160 6962796 ns1.your-site.c 10.1.5.2 3 b 26 64 177 10.913 -9.521 6962796 Mon Oct 2 18:02:29 UTC 2006
为什么ntp不行为？
当地时间和游泳池时间之间有一定差距时，ntp将“更新”更新，即一直执行很小的更改。 这是为了让你的系统行为不会完全跳出块。 以下是手册页中的摘录：
-x通常情况下，如果偏移量小于步长阈值（默认为128毫秒），则时间摆动，如果高于阈值，则时间步进。
此选项将阈值设置为600 s，这正好在精确度窗口内手动设置时钟。 注：由于转换率
典型的Unix内核被限制在0.5ms / s，每秒的调整需要2000s的分期间隔。 因此，作为一个调整
大约600秒将需要将近14天才能完成。 该选项可以与-g和-q选项一起使用。 注意：内核时间纪律
使用此选项禁用。
与目前的时差，将需要很长时间赶上。 我build议你做一个手动更改较小的差异，然后观察这是否工作。
也许ntpd调整时间缓慢或有一些错误，请在/var/log/daemon.log或/ var / log / syslog（ grep -i ntpd /var/log/daemon.log ）中查找。
快速解决scheme是添加一个cron作业ntpdate 0.pool.ntp.org