linux系统查看与设置时区

一、   Linux中查看时区

1.查看系统时间信息

[root@localhost aaron]# date -R

Sat, 12 Mar 2016 14:27:21 +0800

 

2.查看clock系统配置文件

[root@localhost aaron]# more /etc/sysconfig/clock

ZONE="America/Los_Angeles"

二、   Linux中设置时区

1.使用tzselect命令，得到你想要设置的时区的TZ环境变量值，比如TZ='Asia/Shanghai'，表示当前时区为上海。之后，直接设置环境变量TZ='Asia/Shanghai'或在/etc/profile启动文件中配置，就可以生效了。

[root@localhost aaron]# 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) 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

The following information has been given: China east China - Beijing, Guangdong, Shanghai, etc.Therefore TZ='Asia/Shanghai' will be used.

Local time is now:      Fri Mar 11 22:46:33 PST 2016.

Universal Time is now:  Sat Mar 12 06:46:33 UTC 2016.

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

2. 在/usr/share/zoneinfo/下面有很多时区文件，可以复制这些时区文件覆盖/etc/localtime文件。生效的条件是登入系统时，未配置TZ环境变量。

[root@localhost aaron]# date -R

Fri, 11 Mar 2016 23:12:27 -0800

[root@localhost aaron]# cp /usr/share/zoneinfo/Asia/Chongqing /etc/localtime

cp: overwrite `/etc/localtime'? y

[root@localhost aaron]# date -R

Sat, 12 Mar 2016 15:12:48 +0800

3.将/etc/localtime文件链接到/usr/share/zoneinfo/下面的时区文件。生效的条件是登入系统时，未配置TZ环境变量。

[root@localhost aaron]# date -R

Fri, 11 Mar 2016 23:26:58 -0800

[root@localhost aaron]# ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime  

ln: creating symbolic link `/etc/localtime': File exists

[root@localhost aaron]# rm -rf /etc/localtime 

[root@localhost aaron]# ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

[root@localhost aaron]# date -R

Sat, 12 Mar 2016 15:28:21 +0800