阿里云ECS Liunx 设置时区及同步时间

发现服务器时间不对，做如下调整

云服务器 ECS Linux 服务器修改时区的两种方式

在云服务器 ECS Linux 系统中，以 Centos6.5 为例，可以通过如下两种方式，修改系统时区：

通过 tzselect 修改时区

可以使用命令 tzselect，修改时区。操作示例：

$ tzselect
Please identify a location so that time zone rules can be set correctly.
Please select a continent or ocean.
 1) Africa
 2) Americas
 3) Antarctica
 4) Arctic Ocean
 5) Asia
 6) Atlantic Ocean
 7) Australia
 8) Europe
 9) Indian Ocean
10) Pacific Ocean
11) none - I want to specify the time zone using the Posix TZ format.
#? 5输入5，选择亚洲
Please select a country.
 1) Afghanistan18) Israel35) Palestine
 2) Armenia19) Japan36) Philippines
 3) Azerbaijan20) Jordan37) Qatar
 4) Bahrain21) Kazakhstan38) Russia
 5) Bangladesh22) Korea (North)39) Saudi Arabia
 6) Bhutan23) Korea (South)40) Singapore
 7) Brunei24) Kuwait41) Sri Lanka
 8) Cambodia25) Kyrgyzstan42) Syria
 9) China26) Laos43) Taiwan
10) Cyprus27) Lebanon44) Tajikistan
11) East Timor28) Macau45) Thailand
12) Georgia29) Malaysia46) Turkmenistan
13) Hong Kong30) Mongolia47) United Arab Emirates
14) India31) Myanmar (Burma)48) Uzbekistan
15) Indonesia32) Nepal49) Vietnam
16) Iran33) Oman50) Yemen
17) Iraq34) Pakistan
#? 9输入9，选择中国
Please select one of the following time zone regions.
1) east China - Beijing, Guangdong, Shanghai, etc.
2) Heilongjiang (except Mohe), Jilin
3) central China - Sichuan, Yunnan, Guangxi, Shaanxi, Guizhou, etc.
4) most of Tibet & Xinjiang
5) west Tibet & Xinjiang
#? 1输入1，选择北京时间
The following information has been given:
China
east China - Beijing, Guangdong, Shanghai, etc.
Therefore TZ='Asia/Shanghai' will be used.
Local time is now:Mon Nov9 13:40:51 CST 2015.
Universal Time is now:Mon Nov9 05:40:51 UTC 2015.
Is the above information OK?
1) Yes
2) No
#? 1输入1确认
You can make this change permanent for yourself by appending the line
TZ='Asia/Shanghai'; export TZ
to the file '.profile' in your home directory; then log out and log in again.
Here is that TZ value again, this time on standard output so that you
can use the /usr/bin/tzselect command in shell scripts:
Asia/Shanghai

通过修改配置文件修改时区

vi /etc/sysconfig/clock 
ZONE=Asia/Shanghai（查/usr/share/zoneinfo下面的文件）
rm /etc/localtime
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

备注：修改完时区需要重启生效，查看时区可以使用命令 date -R。

阿里云服务器 ECS Liunx 时间同步

先停止 ntpd 服务，然后再通过 ntpdate 命令进行时间同步后，再重新启动 ntpd 即可。