Linux 中如果时区不对, 可能产生很多小问题, 会影响运行的服务同步, 而且如果在使用数据库自动生成时间时会出错等等, 这都是时区引起的问题. 今天我们就来看一下, Linux 中如何设置和修改时区.
设置系统时区
1# 交换式设置命令
2tzselect
3
4# 依次选择设置的时区即可,下方为设置过程
5[root@1889ac6ed47a /etc]# tzselect
6Please identify a location so that time zone rules can be set correctly.
7Please select a continent or ocean.
8 1) Africa
9 2) Americas
10 3) Antarctica
11 4) Arctic Ocean
12 5) Asia
13 6) Atlantic Ocean
14 7) Australia
15 8) Europe
16 9) Indian Ocean
1710) Pacific Ocean
1811) none - I want to specify the time zone using the Posix TZ format.
19#? 5
20Please select a country.
21 1) Afghanistan 18) Israel 35) Palestine
22 2) Armenia 19) Japan 36) Philippines
23 3) Azerbaijan 20) Jordan 37) Qatar
24 4) Bahrain 21) Kazakhstan 38) Russia
25 5) Bangladesh 22) Korea (North) 39) Saudi Arabia
26 6) Bhutan 23) Korea (South) 40) Singapore
27 7) Brunei 24) Kuwait 41) Sri Lanka
28 8) Cambodia 25) Kyrgyzstan 42) Syria
29 9) China 26) Laos 43) Taiwan
3010) Cyprus 27) Lebanon 44) Tajikistan
3111) East Timor 28) Macau 45) Thailand
3212) Georgia 29) Malaysia 46) Turkmenistan
3313) Hong Kong 30) Mongolia 47) United Arab Emirates
3414) India 31) Myanmar (Burma) 48) Uzbekistan
3515) Indonesia 32) Nepal 49) Vietnam
3616) Iran 33) Oman 50) Yemen
3717) Iraq 34) Pakistan
38#? 9
39Please select one of the following time zone regions.
401) Beijing Time
412) Xinjiang Time
42#? 1
43
44The following information has been given:
45
46 China
47 Beijing Time
48
49Therefore TZ='Asia/Shanghai' will be used.
50Local time is now: Sat Aug 29 10:33:56 CST 2020.
51Universal Time is now: Sat Aug 29 02:33:56 UTC 2020.
52Is the above information OK?
531) Yes
542) No
55#? 1
56
57You can make this change permanent for yourself by appending the line
58 TZ='Asia/Shanghai'; export TZ
59to the file '.profile' in your home directory; then log out and log in again.
60
61Here is that TZ value again, this time on standard output so that you
62can use the /usr/bin/tzselect command in shell scripts:
63Asia/Shanghai
更改 UTC 时间为 CST 时间
1# 备份之前的localtime文件
2mv localtime{,.bak}
3
4# 更改CST上海时间
5ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
6
7# 测试
8[root@1889ac6ed47a /etc]# date
9Sat Aug 29 10:38:26 CST 2020
系统所有亚洲的时区时间都放在了/usr/share/zoneinfo/Asia 下了,用户可自行查看,系统/etc/localtime 是一个软链接文件,每当系统调用本地时间都会从这个文件里读取,访问软链接 localtime 相当于访问/usr/share/zoneinfo/Asia/Shanghai 时区文件。
Linux 中的时间是一个文件单独存储的, 又应了那句话, Linux 处处皆文件!