Ubunt修改时间和时区的方法

bob@bob-HP-Pro-2000-Microtower-PC:~$ date -R
Tue, 14 May 2019 08:29:51 +0800

bob@bob-HP-Pro-2000-Microtower-PC:~$ sudo 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) 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

Therefore TZ='Asia/Shanghai' will be used.
Selected time is now: 2019年 05月 14日 星期二 08:56:24 CST.
Universal Time is now:  2019年 05月 14日 星期二 00:56:24 UTC.
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

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

sudo ntpdate time.windows.com

sudo date -s MM/DD/YY //修改日期
sudo date -s hh:mm:ss //修改时间

sudo hwclock --systohc //非常重要，如果没有这一步的话，后面时间还是不准