Linux uses the date command to modify the time of day detailed

Linux time modification does not restart modify time zone

First, the time to modify Linux

Root uses the date directive: Date-s

1, only modify the date, do not modify the time, input:

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Date-s 2007-08-03

2, only modify the time, input:

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Date-s 14:15:00

3, at the same time modify the date time, note to add double quotes, date and time between a space, input:

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Date-s "2007-08-03 14:15:00"

4, after the modification, remember to enter:

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Clock-w

Writes the system time to the CMOS

Second, modify the time zone does not restart

Under the root

1, copy the appropriate time zone files, replace the system time zone files:

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cp/usr/share/zoneinfo/$ Primary time zone/$ secondary time zone/etc/localtime

For example:

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

you may not be able to modify the time with the date command

. First find the file for the rotating time zone:/usr/share/zoneinfo/asia/shanghai replaces the file with this file/etc/localtime (note that you must distinguish between case or not, the small part of the file is not recognized.) Linux systems are case-sensitive)

2. Then modify the/etc/sysconfig/clock to read as follows:

Zone= "Asia/shanghai"

Utc=true

Arc=false

3. The following command can be executed again to correct:

/usr/sbin/ntpdate-u 0.asia.pool/ntp.org

4. Sometimes the above command bash reminds you that there are no files so you can install an NTP package

Yum Install-y ntp*

And then execute the 3 bash statement.