timedatectl命令使用介绍_jxywxy

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timedatectl命令使用介绍

(2020-03-19 10:58:50)

标签：

timedatectl

使用

分类： linux

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息。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/时区等基本信息和设定的介绍，可参看如下文章，本文不再赘述。

https://blog.csdn.net/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 “时区信息”

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

执行示例

[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

执行示例

[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 “时区信息”

执行示例

[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息不正确的话会提示Invalid time zone的信息

设置UTC

命令：timedatectl set-timezone UTC

执行示例

[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

执行示例

[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

执行示例

[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”

执行示例

[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

执行示例

[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

执行示例

[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

执行示例

[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

执行示例

[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 ~]#

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原文链接：https://blog.csdn.net/liumiaocn/article/details/88408155

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