Linux CentOS

CentOS 6 & CentOS 7 都适用。

1.使用 tzselect 设置系统时区:

查看当前时区:

[root@localhost ~]# date
Sat May 16 19:09:19 EDT 2020
[root@localhost ~]# date -R
Sat, 16 May 2020 19:12:11 -0400
EDT (Eastern Daylight Time - 美国东部夏令时) 。

第一步: 执行 tzselect指令,根据提示选择大洲、国家、时间标准。

[root@localhost ~]# 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
Please select a country.
1) Afghanistan 18) Israel 35) Palestine
2) Armenia 19) Japan 36) Philippines
3) Azerbaijan 20) Jordan 37) Qatar
4) Bahrain 21) Kazakhstan 38) Russia
5) Bangladesh 22) Korea (North) 39) Saudi Arabia
6) Bhutan 23) Korea (South) 40) Singapore
7) Brunei 24) Kuwait 41) Sri Lanka
8) Cambodia 25) Kyrgyzstan 42) Syria
9) China 26) Laos 43) Taiwan
10) Cyprus 27) Lebanon 44) Tajikistan
11) East Timor 28) Macau 45) Thailand
12) Georgia 29) Malaysia 46) Turkmenistan
13) Hong Kong 30) Mongolia 47) United Arab Emirates
14) India 31) Myanmar (Burma) 48) Uzbekistan
15) Indonesia 32) Nepal 49) Vietnam
16) Iran 33) Oman 50) Yemen
17) Iraq 34) Pakistan
#? 9
Please select one of the following time zone regions.
1) Beijing Time
2) Xinjiang Time
#? 1

The following information has been given:

China
Beijing Time

Therefore TZ='Asia/Shanghai' will be used.
Local time is now: Sun May 17 07:27:51 CST 2020.
Universal Time is now: Sat May 16 23:27:51 UTC 2020.
Is the above information OK?
1) Yes
2) No
#? 1

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

第二步:

[root@localhost ~]# date
Sat May 16 19:29:34 EDT 2020
[root@localhost ~]# TZ='Asia/Shanghai'; export TZ
[root@localhost ~]# date
Sun May 17 07:30:18 CST 2020

通过上步可以看出,时区已经更改。但是服务器重启后以上时区设置将会失效。

也可增加至自己主目录的 .profile 文件,使配置永久生效。

CentOS 6版本也可同时修改配置文件:

[root@node1 ~]# more /etc/sysconfig/clock 
# The time zone of the system is defined by the contents of /etc/localtime.
# This file is only for evaluation by system-config-date, do not rely on its contents elsewhere.
ZONE="Asia/Shanghai"


2.直接更改系统文件:

[root@localhost ~]# cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime 
cp: overwrite ?etc/localtime? y
[root@localhost ~]# date
Sun May 17 07:43:05 CST 2020

永久生效


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