原文地址: https://www.jianshu.com/p/7a770f541f91
1. 相关命令
1. date: print or set the system date and time
2. hwclock: query or set the hardware clock (RTC)
3. timedatectl: Control the system time and date
2. 查看
2.1 date命令
# date
Thu Jul 13 16:49:54 CST 2017
2.2 hwclock命令
# hwclock -r
Thu 13 Jul 2017 04:50:49 PM CST -0.861128 seconds
需要权限
2.3 timedatectl命令
$ timedatectl
Local time: Thu 2017-07-13 17:29:18 CST
Universal time: Thu 2017-07-13 09:29:18 UTC
RTC time: Thu 2017-07-13 09:29:09
Time zone: Asia/Shanghai (CST, +0800)
NTP enabled: yes
NTP synchronized: yes
RTC in local TZ: no
DST active: n/a
3. 时间设置
3.1 date命令
语法
date --set='STRING'
date -s 'STRING'
示例:
# date -s '2017-07-13 15:11:00'
# date --set='2017-07-13 15:11:00'
如果参数只填写日期则时间默认为0:
# date -s '20170811'
Fri Aug 11 00:00:00 UTC 2017
可以单独设置时间:
# date -s '14:12:32'
Fri Aug 11 14:12:32 UTC 2017
3.2 hwclock命令
将系统时间写入到hardware,这样以后重启后设置的时间仍会生效:
# hwclock -w
3.3 timedatectl命令
# timedatectl set-time 'String'
示例:
# timedatectl set-time '2015-11-23 08:10:40'
# timedatectl set-time '10:42:43'
如果设置了自动同步时间的功能，设置将会无效:
Failed to set time: Automatic time synchronization is enabled
4. 时区设置
timedatectl status // 列出系统时区和时间信息
timedatectl list-timezones // 列出所有时区
timedatectl set-timezone 'Asia/Shanghai’
