Ubuntu 18.04.5修改时区

• 切换到root账号下

lbs@lbs-virtual-machine:~$ sudo -s
[sudo] password for lbs:

• 查看当前时区

root@lbs-virtual-machine:~# date -R 
Mon, 04 Jan 2021 10:21:17 -0500

• 运行tzselect

root@lbs-virtual-machine:~# tzselect
Please identify a location so that time zone rules can be set correctly.
Please select a continent, ocean, "coord", or "TZ".
1) Africa
2) Americas
3) Antarctica
4) Asia
5) Atlantic Ocean
6) Australia
7) Europe
8) Indian Ocean
9) Pacific Ocean
10) coord - I want to use geographical coordinates.
11) TZ - I want to specify the time zone using the Posix TZ format.
#? 4

• 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)

Please select a country whose clocks agree with yours.
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.
Selected time is now: Mon Jan 4 23:23:11 CST 2021.
Universal Time is now: Mon Jan 4 15:23:11 UTC 2021.
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

• 复制文件到/etc目录下

root@lbs-virtual-machine:~# cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

• 再次查看时区，是否东八区

root@lbs-virtual-machine:~# date -R
Mon, 04 Jan 2021 23:25:45 +0800