在新安装完一个Ubuntu系统后，很多情况下会出现系统时间和网络时间不一致的情况，下面我们通过tzselect 来更改一下系统时间，由于命令很简单 下面就直接列出指令执行过程了。
root@rock64:~/.halo# date
Wed Aug 3 04:17:48 UTC 2022
root@rock64:~/.halo# 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
Please select a country whose clocks agree with yours.
1) Afghanistan 18) Iraq 35) Pakistan
2) Antarctica 19) Israel 36) Palestine
3) Armenia 20) Japan 37) Philippines
4) Azerbaijan 21) Jordan 38) Qatar
5) Bahrain 22) Kazakhstan 39) Russia
6) Bangladesh 23) Korea (North) 40) Saudi Arabia
7) Bhutan 24) Korea (South) 41) Singapore
8) Brunei 25) Kuwait 42) Sri Lanka
9) Cambodia 26) Kyrgyzstan 43) Syria
10) China 27) Laos 44) Taiwan
11) Cyprus 28) Lebanon 45) Tajikistan
12) East Timor 29) Macau 46) Thailand
13) Georgia 30) Malaysia 47) Turkmenistan
14) Hong Kong 31) Mongolia 48) United Arab Emirates
15) India 32) Myanmar (Burma) 49) Uzbekistan
16) Indonesia 33) Nepal 50) Vietnam
17) Iran 34) Oman 51) Yemen
#? 10
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: Wed Aug 3 12:18:51 CST 2022.
Universal Time is now: Wed Aug 3 04:18:51 UTC 2022.
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
root@rock64:~/.halo# cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
root@rock64:~/.halo# time
real 0m0.000s
user 0m0.000s
sys 0m0.000s
root@rock64:~/.halo# date
Wed Aug 3 12:19:22 CST 2022
root@rock64:~/.halo#
