centOS时钟同步

安装NTP

[root@callcenterbak ~]# yum install ntp

Loaded plugins: fastestmirror

Loading mirror speeds from cached hostfile

 * addons: centos.mirror.cdnetworks.com

 * base: centos.ustc.edu.cn

 * extras: centos.mirror.cdnetworks.com

 * updates: centos.mirror.cdnetworks.com

Setting up Install Process

Resolving Dependencies

--> Running transaction check

---> Package ntp.x86_64 0:4.2.2p1-9.el5.centos.2.1 set to be updated

--> Finished Dependency Resolution

Dependencies Resolved

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

 Package                Arch                      Version                                      Repository               Size

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

Updating:

 ntp                    x86_64                    4.2.2p1-9.el5.centos.2.1                     base                    1.3 M

Transaction Summary

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

Install      0 Package(s)        

Update       1 Package(s)        

Remove       0 Package(s)        

Total download size: 1.3 M

Is this ok [y/N]: y

Downloading Packages:

ntp-4.2.2p1-9.el5.centos.2.1.x86_64.rpm                                                               | 1.3 MB     00:00    

warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID e8562897

base/gpgkey                                                                                           | 1.5 kB     00:00    

Importing GPG key 0xE8562897 "CentOS-5 Key (CentOS 5 Official Signing Key) <centos-5-key@centos.org>" from /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

Is this ok [y/N]: y

Running rpm_check_debug

Running Transaction Test

Finished Transaction Test

Transaction Test Succeeded

Running Transaction

  Updating       : ntp                                                                                                   1/2

  Cleanup        : ntp                                                                                                   2/2

Updated:

  ntp.x86_64 0:4.2.2p1-9.el5.centos.2.1                                                                                     

Complete!

 

然后cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

[root@callcenterbak ~]# cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

cp：是否覆盖“/etc/localtime”? y

这一句是把当前时区调整为上海就是+8区,想改其他时区也可以去看看/usr/share/zoneinfo目录;

最后同步时间：

[root@callcenterbak ~]# ntpdate us.pool.ntp.org

17 Nov 17:18:42 ntpdate[9562]: step time server 66.172.42.32
offset -28366.880328 sec

[root@localhost u01]# clock -w

最后 reboot 系统