Network Time Protocol

• http://www.linuxhomenetworking.com/wiki/index.php/Quick_HOWTO_:_Ch24_:_The_NTP_Server

Update the datetime

Time was back in 2000, the below ntpdate got back in the ballpark, but timezone was off:

[blyth@hfag blyth]$ sudo /usr/sbin/ntpdate -u ntp.ucsd.edu
 8 Sep 20:23:22 ntpdate[2805]: step time server 132.239.1.6 offset 429053400.504246 sec
[blyth@hfag blyth]$ date
Sun Sep  8 20:23:29 GMT+8 2013
[blyth@hfag blyth]$ sudo /usr/sbin/ntpdate -u ntp.ucsd.edu
Password:
 8 Sep 20:23:53 ntpdate[2808]: adjust time server 132.239.1.6 offset 0.000532 sec
[blyth@hfag blyth]$ date
Sun Sep  8 20:24:03 GMT+8 2013
[blyth@hfag blyth]

Timezone setup

• http://www.hypexr.org/linux_date_time_help.php

Creating a symbolic link from /etc/localtime to the zoneinfo file succeeded to get it straight.:

[blyth@hfag blyth]$ sudo rm  /etc/localtime
[blyth@hfag blyth]$ sudo ln -s /usr/share/zoneinfo/Asia/Taipei /etc/localtime
[blyth@hfag blyth]$ date
Mon Sep  9 12:35:34 CST 2013

Config

The ntp server to connect to was gleaned from the conf.

• /etc/ntp.conf

For the docs etc..

[blyth@hfag blyth]$ rpm -ql ntp
/etc/ntp
/etc/ntp.conf
/etc/ntp/keys
/etc/ntp/step-tickers
/etc/rc.d/init.d/ntpd
/etc/sysconfig/ntpd
/usr/bin/ntpstat
/usr/sbin/ntp-genkeys
/usr/sbin/ntp-wait
/usr/sbin/ntpd
/usr/sbin/ntpdate
/usr/sbin/ntpdc
/usr/sbin/ntpq
/usr/sbin/ntptime
/usr/sbin/ntptimeset
/usr/sbin/ntptrace
/usr/sbin/tickadj
/usr/share/doc/ntp-4.1.2
/usr/share/doc/ntp-4.1.2/NEWS
/usr/share/doc/ntp-4.1.2/Oncore-SHMEM.htm
/usr/share/doc/ntp-4.1.2/TODO
/usr/share/doc/ntp-4.1.2/accopt.htm
/usr/share/doc/ntp-4.1.2/assoc.htm
/usr/share/doc/ntp-4.1.2/audio.htm
...