@linux系统时间设定及查看

#时间查看命令及修改

[root@string ~]# date
Fri Mar 5 09:50:27 CST 2021
[root@string ~]# date +%Y-%m-%d
2021-03-05

# 格式化时间
[root@string ~]# # 09:58:30
[root@string ~]# date +%H:%M:%S
10:01:44
[root@string ~]# date +%Y-%m-%d_%H:%M:%S
2021-03-05_10:02:05

# 设置时间
[root@string ~]# date -s "2029-03-05 10:02:44"
Mon Mar 5 10:02:44 CST 2029
[root@string ~]# date +%Y-%m-%d_%H:%M:%S
2029-03-05_10:03:03

# 同步互联网时间
[root@string ~]# yum install -y ntpdate
[root@string ~]# ntpdate ntp.aliyun.com

# 系统硬件时钟
[root@string ~]# hwclock -r
Fri 05 Mar 2021 10:10:40 AM CST -0.271305 seconds

# 系统软件时钟
[root@string ~]# date
Mon Mar 5 10:03:30 CST 2029

# 获取硬件时间
[root@string ~]# hwclock -r
Fri 05 Mar 2021 10:13:19 AM CST -0.473926 seconds

# 将硬件时间同步到系统时间
[root@string ~]# hwclock -r
Fri 05 Mar 2021 10:13:19 AM CST -0.473926 seconds
[root@string ~]# date
Mon Mar 5 10:06:20 CST 2029
[root@string ~]# hwclock -s
[root@string ~]# date
Fri Mar 5 10:14:19 CST 2021

# 查看时区状态
[root@string ~]# timedatectl status
Local time: Fri 2021-03-05 10:26:39 CST
Universal time: Fri 2021-03-05 02:26:39 UTC
RTC time: Fri 2021-03-05 02:26:33
Time zone: Asia/Shanghai (CST, +0800)
NTP enabled: n/a
NTP synchronized: no
RTC in local TZ: no
DST active: n/a

# 设置时区
[root@string ~]# timedatectl set-timezone Asia/Shanghai