Linux 时区修改
随笔记录，时区修改
1.使用命令：tzselect
1. 使用命令：tzselect在这里我们选择亚洲 Asia，确认之后选择中国（China)，最后选择北京(Beijing)
[root@localhost ~]# tzselect
Please identify a location so that time zone rules can be set correctly.
Please select a continent or ocean.1) Africa2) Americas3) Antarctica4) Arctic Ocean5) Asia6) Atlantic Ocean7) Australia8) Europe9) 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) Palestine2) Armenia 19) Japan 36) Philippines3) Azerbaijan 20) Jordan 37) Qatar4) Bahrain 21) Kazakhstan 38) Russia5) Bangladesh 22) Korea (North) 39) Saudi Arabia6) Bhutan 23) Korea (South) 40) Singapore7) Brunei 24) Kuwait 41) Sri Lanka8) Cambodia 25) Kyrgyzstan 42) Syria9) 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
#? 1The following information has been given:ChinaBeijing TimeTherefore TZ='Asia/Shanghai' will be used.
Local time is now: Tue May 30 10:36:49 CST 2023.
Universal Time is now: Tue May 30 02:36:49 UTC 2023.
Is the above information OK?
1) Yes
2) No
#? 1You can make this change permanent for yourself by appending the lineTZ='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 /bin/tzselect command in shell scripts:
Asia/Shanghai
[root@localhost ~]# root@localhost ~]#
[root@localhost ~]# date
Mon May 29 22:37:03 EDT 20232.复制文件到/etc目录下
[root@localhost ~]# cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
cp: overwrite ‘/etc/localtime’? Y
[root@localhost ~]# 3.再次查看时间date -R，已经修改为北京时间
[root@localhost ~]# date -R
Tue, 30 May 2023 10:38:00 +0800
[root@localhost ~]# 2. Linux中查看有关时间的命令是date [选项] +[格式]
首先我们先看看单纯的date的输出结果，其中CST表示东八区
[root@localhost ~]# date
Tue May 30 11:31:03 CST 2023
[root@localhost ~]#
3. 使用 timedatectl命令可以查看时区
[root@localhost ~]#
[root@localhost ~]# timedatectl
Local time: Tue 2023-05-30 11:31:28 CST
Universal time: Tue 2023-05-30 03:31:28 UTC
RTC time: Tue 2023-05-30 03:31:28
Time zone: America/New_York (CST, +0800)
NTP enabled: yes
NTP synchronized: yes
RTC in local TZ: no
DST active: n/a
[root@localhost ~]#
4. 使用date -s "yyyy-MM-dd hh:mm:ss"，例如将当前系统时间设置为2021年1月4日12:00:00则使用date -s "2021-01-04 12:00:00"
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