Linux基础：timedatectl命令使用介绍
timedatectl是Linux下的一条命令，用于控制系统时间和日期。可以用来查询和更改系统时钟于设定，同时可以设定和修改时区信。这篇文章简单介绍一下如何使用timedatectl进行常见操作。
基础知识
关于RTC/系统时钟/NTP/时区等基本信和设定的介绍，可参看如下文章，本文不再赘述。
- blog.csdn/liumiaocn/article/details/79250793
常见用法
使用timedatectl可以进行如下常见操作
- 查看当前时间/日期/时区：timedatectl或者timedatectl status
- 查看所有可用时区：timedatectl list-timezones
- 设置时区：timedatectl set-timezone “时区信”
- 设置UTC：timedatectl set-timezone UTC
- 设置时间：timedatectl set-time HH:MM:SS
- 设置日期：timedatectl set-time YYYY-MM-DD
- 设置日期时间：timedatectl set-time “YYYY-MM-DD HH:MM:SS”
- 设置硬件时钟为本地时间：timedatectl set-local-rtc 1
- 设置硬件时钟为UTC时间：timedatectl set-local-rtc 0
- 启动NTP时间同步（启用NTP服务或者Chrony服务）：timedatectl set-ntp true
- 禁用NTP时间同步：timedatectl set-ntp false
使用示例
查看当前时间/日期/时区
命令：timedatectl或者timedatectl status
[root@platform ~]# timedatectl status
Local time: Fri 2019-03-08 06:07:19 EST
Universal time: Fri 2019-03-08 11:07:19 UTC
RTC time: Fri 2019-03-08 09:41:48
Time zone: America/New_York (EST, -0500)
NTP enabled: yes
NTP synchronized: no
RTC in local TZ: no
DST active: no
Last DST change: DST ended at
Sun 2018-11-04 01:59:59 EDT
Sun 2018-11-04 01:00:00 EST
Next DST change: DST begins (the clock jumps one hour forward) at
Sun 2019-03-10 01:59:59 EST
Sun 2019-03-10 03:00:00 EDT
[root@platform ~]#
查看所有可用时区
命令：timedatectl list-timezones
[root@platform ~]# timedatectl list-timezones
Africa/Abidjan
Africa/Accra
Africa/Addis_Ababa
Africa/Algiers
Africa/Asmara
Africa/Bamako
Africa/Bangui
Africa/Banjul
Africa/Bissau
Africa/Blantyre
Africa/Brazzaville
Africa/Bujumbura
Africa/Cairo
Africa/Casablanca
Africa/Ceuta
Africa/Conakry
Africa/Dakar
Africa/Dar_es_Salaam
Africa/Djibouti
Africa/Douala
Africa/El_Aaiun
Africa/Freetown
Africa/Gaborone
Africa/Harare
Africa/Johannesburg
Africa/Juba
Africa/Kampala
Africa/Khartoum
Africa/Kigali
lines 1-29
设置时区
命令：timedatectl set-timezone “时区信”
[root@platform ~]# timedatectl set-timezone "Asia/ShangHai"
Failed to set time zone: Invalid time zone 'Asia/ShangHai'
[root@platform ~]# timedatectl set-timezone "Asia/Shanghai"
[root@platform ~]# timedatectl
Local time: Fri 2019-03-08 19:13:38 CST
Universal time: Fri 2019-03-08 11:13:38 UTC
RTC time: Fri 2019-03-08 09:47:38
Time zone: Asia/Shanghai (CST, +0800)
NTP enabled: yes
NTP synchronized: no
RTC in local TZ: no
DST active: n/a
[root@platform ~]#
注意可以看到如果时区信不正确的话会提示Invalid time zone的信
设置UTC
命令：timedatectl set-timezone UTC
[root@platform ~]# timedatectl
Local time: Fri 2019-03-08 19:14:48 CST
Universal time: Fri 2019-03-08 11:14:48 UTC
RTC time: Fri 2019-03-08 09:48:42
Time zone: Asia/Shanghai (CST, +0800)
NTP enabled: yes
NTP synchronized: no
RTC in local TZ: no
DST active: n/a
[root@platform ~]# timedatectl set-timezone UTC
[root@platform ~]# timedatectl status
Local time: Fri 2019-03-08 11:15:05 UTC
Universal time: Fri 2019-03-08 11:15:05 UTC
RTC time: Fri 2019-03-08 09:48:59
Time zone: UTC (UTC, +0000)
NTP enabled: yes
NTP synchronized: no
RTC in local TZ: no
DST active: n/a
[root@platform ~]#
设置时间
命令：timedatectl set-time HH:MM:SS
[root@platform ~]# timedatectl set-timezone "Asia/Shanghai"
[root@platform ~]# date
Fri Mar 8 19:15:36 CST 2019
[root@platform ~]#
[root@platform ~]# timedatectl set-time "20:45:00"
Failed to set time: Automatic time synchronization is enabled
[root@platform ~]# date
Fri Mar 8 19:16:20 CST 2019
[root@platform ~]#
[root@platform ~]# timedatectl set-ntp false
[root@platform ~]# timedatectl set-time "20:45:00"
[root@platform ~]# date
Fri Mar 8 20:45:01 CST 2019
[root@platform ~]#
注意: 如果ntp时间同步为true时无法修改时间设定
设置日期
命令：timedatectl set-time YYYY-MM-DD
[root@platform ~]# timedatectl set-ntp false
[root@platform ~]# timedatectl set-time 2019-03-10
[root@platform ~]# date
Sun Mar 10 00:00:01 CST 2019
[root@platform ~]#
注意: 如果ntp时间同步为true时无法修改时间设定
设置日期时间
命令：timedatectl set-time “YYYY-MM-DD HH:MM:SS”
[root@platform ~]# timedatectl set-ntp false
[root@platform ~]# timedatectl set-time "2019-03-11 20:45:00"
[root@platform ~]# date
Mon Mar 11 20:45:01 CST 2019
[root@platform ~]#
注意: 如果ntp时间同步为true时无法修改时间设定
设置硬件时钟为本地时间
命令：timedatectl set-local-rtc 1
[root@platform ~]# timedatectl
Local time: Mon 2019-03-11 20:58:12 CST
Universal time: Mon 2019-03-11 12:58:12 UTC
RTC time: Mon 2019-03-11 12:46:14
Time zone: Asia/Shanghai (CST, +0800)
NTP enabled: yes
NTP synchronized: yes
RTC in local TZ: no
DST active: n/a
[root@platform ~]# timedatectl set-local-rtc 1
[root@platform ~]# timedatectl status
Local time: Mon 2019-03-11 20:58:16 CST
Universal time: Mon 2019-03-11 12:58:16 UTC
RTC time: Mon 2019-03-11 20:58:16
Time zone: Asia/Shanghai (CST, +0800)
NTP enabled: yes
NTP synchronized: yes
RTC in local TZ: yes
DST active: n/a
Warning: The system is configured to read the RTC time in the local time zone.
This mode can not be fully supported. It will create various problems
with time zone changes and daylight saving time adjustments. The RTC
time is never updated, it relies on external facilities to maintain it.
If at all possible, use RTC in UTC by calling
'timedatectl set-local-rtc 0'.
[root@platform ~]#
设置硬件时钟为UTC时间
命令：timedatectl set-local-rtc 0
[root@platform ~]# timedatectl
Local time: Mon 2019-03-11 20:59:18 CST
Universal time: Mon 2019-03-11 12:59:18 UTC
RTC time: Mon 2019-03-11 20:59:17
Time zone: Asia/Shanghai (CST, +0800)
NTP enabled: yes
NTP synchronized: yes
RTC in local TZ: yes
DST active: n/a
Warning: The system is configured to read the RTC time in the local time zone.
This mode can not be fully supported. It will create various problems
with time zone changes and daylight saving time adjustments. The RTC
time is never updated, it relies on external facilities to maintain it.
If at all possible, use RTC in UTC by calling
'timedatectl set-local-rtc 0'.
[root@platform ~]#
[root@platform ~]# timedatectl set-local-rtc 0
[root@platform ~]# timedatectl status
Local time: Mon 2019-03-11 20:59:27 CST
Universal time: Mon 2019-03-11 12:59:27 UTC
RTC time: Mon 2019-03-11 12:59:27
Time zone: Asia/Shanghai (CST, +0800)
NTP enabled: yes
NTP synchronized: yes
RTC in local TZ: no
DST active: n/a
[root@platform ~]#
启动NTP时间同步（启用NTP服务或者Chrony服务）
命令：timedatectl set-ntp true
[root@platform ~]# timedatectl status
Local time: Mon 2019-03-11 21:00:19 CST
Universal time: Mon 2019-03-11 13:00:19 UTC
RTC time: Mon 2019-03-11 13:00:19
Time zone: Asia/Shanghai (CST, +0800)
NTP enabled: no
NTP synchronized: yes
RTC in local TZ: no
DST active: n/a
[root@platform ~]# timedatectl set-ntp true
[root@platform ~]# timedatectl status
Local time: Mon 2019-03-11 21:00:24 CST
Universal time: Mon 2019-03-11 13:00:24 UTC
RTC time: Mon 2019-03-11 13:00:24
Time zone: Asia/Shanghai (CST, +0800)
NTP enabled: yes
NTP synchronized: no
RTC in local TZ: no
DST active: n/a
[root@platform ~]#
禁用NTP时间同步
命令：timedatectl set-ntp false
[root@platform ~]# timedatectl status
Local time: Mon 2019-03-11 21:00:45 CST
Universal time: Mon 2019-03-11 13:00:45 UTC
RTC time: Mon 2019-03-11 13:00:44
Time zone: Asia/Shanghai (CST, +0800)
NTP enabled: yes
NTP synchronized: yes
RTC in local TZ: no
DST active: n/a
[root@platform ~]# timedatectl set-ntp false
[root@platform ~]# timedatectl status
Local time: Mon 2019-03-11 21:00:50 CST
Universal time: Mon 2019-03-11 13:00:50 UTC
RTC time: Mon 2019-03-11 13:00:50
Time zone: Asia/Shanghai (CST, +0800)
NTP enabled: no
NTP synchronized: yes
RTC in local TZ: no
DST active: n/a
[root@platform ~]#
参考文章
blog.csdn/liumiaocn/article/details/79250793
本文标签：
命令基础Linuxtimedatectl
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