Linux How to view and modify time zones

1. Check the system time zone:

Method 1:

[Email protected] ~]# date-r

Sun, Sep 2014 23:10:23-0400

Method 2:

[Email protected] ~]# Cat/etc/sysconfig/clock

# The ZONE parameter is only evaluated by System-config-date.

# The timezone of the system is defined by the contents of/etc/localtime.

Zone= "America/new_york"

Utc=true

Arc=false

2. Modify the system time zone:

Method 1: Use Tzselect

[Email protected] ~]# Tzselect

Please identify a, so, 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

Pacific Ocean

One) None-i want to specify the time zone using the Posix TZ format.

#? 5

Please select a country.

1) Afghanistan Israel) Palestine

2) Armenia Japan) Philippines

3) Azerbaijan Jordan PNs) Qatar

4) Bahrain Kazakhstan) Russia

5) Bangladesh Korea (north), Saudi Arabia

6) Korea (south) Bhutan) Singapore

7) Brunei Kuwait) Sri Lanka

8) Cambodia Kyrgyzstan) Syria

9) Laos) Taiwan

(Cyprus) Lebanon) Tajikistan

(one) East Timor) Macau Thailand

(Georgia) Malaysia) Turkmenistan

Hong Kong) Mongolia Arab Emirates

India) Myanmar (Burma) Uzbekistan

(Indonesia) Nepal) Vietnam

Iran) Oman Yemen

() Iraq) 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 ' would be used.

Local time is Now:mon SEP 8 11:19:54 CST 2014.

Universal time is Now:mon SEP 8 03:19:54 UTC 2014.

is the above information OK?

1) Yes

2) No

#? 1

You can make the permanent to yourself by appending the line

tz= ' Asia/shanghai '; Export TZ

To the file '. Profiles ' in your home directory; Then logs out and logs in again.

Here is the TZ value again, this time

can use The/usr/bin/tzselect command in shell scripts:

Asia/shanghai

[Email protected] ~]#

Method 2: Use Timeconfig (Redhat Linux and CentOS only)

Method 3: Copy the appropriate time zone file, replace the system time zone file, or create a linked file

cp/usr/share/zoneinfo/$ main time zone/$ times time zone/etc/localtime

For example: In set China time zone use Asia/Shanghai (+8)

Cp/usr/share/zoneinfo/asia/shanghai/etc/localtime

Modify the/etc/sysconfig/clock to the appropriate configuration:

[Email protected] asia]# Cat/etc/sysconfig/clock

# The ZONE parameter is only evaluated by System-config-date.

# The timezone of the system is defined by the contents of/etc/localtime.

Zone= "Asia/shanghai"

Utc=true

Arc=false

3. Write the modified information to Hwclock.

Hwclock-w

4. Verify that:

Hwclock

Date-r

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Linux How to view and modify time zones