ubuntu如何设置正确的时间

1. 问题

1.1. 查看系统的时间

$ date
Fri 06 Dec 2024 05:54:04 AM UTC

1.2. 实际当前的时间是

2. 修改

2.1. 修改时区

~# 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) Arctic Ocean
 5) Asia
 6) Atlantic Ocean
 7) Australia
 8) Europe
 9) Indian Ocean
10) Pacific Ocean
11) coord - I want to use geographical coordinates.
12) TZ - I want to specify the time zone using the Posix TZ format.
#? 5
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.
Local time is now:    Thu May 30 10:09:37 CST 2019.
Universal Time is now:    Thu May 30 02:09:37 UTC 2019.
Is the above information OK?
1) Yes
2) No
#? yes
Please enter a number in range.
#? 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

2.2. 保存时区文件

$ cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

2.3. 保存到系统底层

 $ hwclock --systohc

2.4. 查看时间（修改好了）

$ date
Fri 06 Dec 2024 01:59:59 PM CST

3. 参考

1. Ubuntu修改时区和更新时间_ubuntu 修改市区-优快云博客
2. https://juejin.cn/post/7001129120604094494
3. Ubuntu修改时区和更新时间_ubuntu 更新时间-优快云博客
4. 用Ubuntu更改服务器时钟为正确时间的步骤 - 北斗时源NTP服务器