Linux时区和NTP服务配置

首先设置时区:
将对应时区文件拷贝一个副本为/etc/localtime

<SHELL># cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

1	<SHELL># cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

然后配置参数文件，设置为/etc/localtime对应的时区

vim /etc/sysconfig/clock
# The time zone file under /usr/share/zoneinfo that /etc/localtime is a copy of.
ZONE="Asia/Shanghai"
# The hardware clock is set to local time instead of Universal Time. UTC 使用localtime而不是universal time
UTC=no

vim /etc/sysconfig/clock

# The time zone file under /usr/share/zoneinfo that /etc/localtime is a copy of.

ZONE="Asia/Shanghai"

# The hardware clock is set to local time instead of Universal Time. UTC 使用localtime而不是universal time

UTC=no

为了方便某些应用程序，也要将TZ环境变量写入/etc/profile中：

export TZ="Asia/Shanghai"

1	export TZ="Asia/Shanghai"

使用ntpdate连接测试：

<SHELL># ntpdate ntp.api.bz
 5 May 19:53:18 ntpdate[11340]: step time server 61.153.197.226 offset 2.531909 sec

1 2	<SHELL># ntpdate ntp.api.bz 5 May 19:53:18 ntpdate[11340]: step time server 61.153.197.226 offset 2.531909 sec

将当前时间设置为硬件时钟（Set the Hardware Clock to the current System Time.）

<SHELL># /sbin/hwclock --systohc

1	<SHELL># /sbin/hwclock --systohc

node02节点作为ntp server，其他节点通过该节点来同步时间。

[root@node02 Desktop]# vim /etc/ntp.conf
#drift and keys
driftfile /var/lib/ntp/drift
includefile /etc/ntp/crypto/pw
keys /etc/ntp/keys

#access control
restrict 127.0.0.1 
restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap

server ntp.api.bz prefer
server 127.127.1.0
fudge 127.127.1.0 stratum 10

[root@node02 Desktop]# vim /etc/ntp.conf

#drift and keys

driftfile /var/lib/ntp/drift

includefile /etc/ntp/crypto/pw

keys /etc/ntp/keys

#access control

restrict 127.0.0.1

restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap

server ntp.api.bz prefer

server 127.127.1.0

fudge 127.127.1.0 stratum 10

下层ntpd的配置。

[root@node01 Desktop]# vim /etc/ntp.conf
#drift and keys
driftfile /var/lib/ntp/drift
includefile /etc/ntp/crypto/pw
keys /etc/ntp/keys

#access control
restrict 127.0.0.1 
restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap

server node02 prefer
server ntp.api.bz


# service ntpd restart
Shutting down ntpd:                                        [FAILED]
Starting ntpd:                                             [  OK  ]

[root@node01 Desktop]# vim /etc/ntp.conf

#drift and keys

driftfile /var/lib/ntp/drift

includefile /etc/ntp/crypto/pw

keys /etc/ntp/keys

#access control

restrict 127.0.0.1

restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap

server node02 prefer

server ntp.api.bz

# service ntpd restart

Shutting down ntpd: [FAILED]

Starting ntpd: [ OK ]

查看两边的时间同步信息：

[root@node02 Desktop]# ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
 114.80.81.1     .INIT.          16 u    -   64    0    0.000    0.000   0.000
*LOCAL(0)        .LOCL.           5 l   56   64    3    0.000    0.000   0.000

# ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*OSTack02        LOCAL(0)         6 u   47   64  177    0.843   -0.058   0.528
 114.80.81.1     .STEP.          16 u    -  256    0    0.000    0.000   0.000

[root@node02 Desktop]# ntpq -p

remote refid st t when poll reach delay offset jitter

==============================================================================

114.80.81.1 .INIT. 16 u - 64 0 0.000 0.000 0.000

*LOCAL(0) .LOCL. 5 l 56 64 3 0.000 0.000 0.000

# ntpq -p

remote refid st t when poll reach delay offset jitter

==============================================================================

*OSTack02 LOCAL(0) 6 u 47 64 177 0.843 -0.058 0.528

114.80.81.1 .STEP. 16 u - 256 0 0.000 0.000 0.000

最后设置ntpd服务开机启动

<SHELL># chkconfig ntpd --level 35 on

1	<SHELL># chkconfig ntpd --level 35 on

下面的一些资料更全面的介绍了时区和NTP的配置：
鸟哥Linux私房菜：http://linux.vbird.org/linux_server/0440ntp.php#ntpq

http://en.linuxreviews.org/NTP_-_Howto_make_the_clock_show_the_correct_time

http://www.centos.org/docs/5/html/5.2/Deployment_Guide/s2-sysconfig-clock.html

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