Centos設定時區和同步系統時鐘

1、通過timedatectl命設定所屬時區

timedatectl命令用法如下

# timedatectl --help
timedatectl [OPTIONS...] COMMAND ...

Query or change system time and date settings.

  -h --help                Show this help message
     --version             Show package version
     --no-pager            Do not pipe output into a pager
     --no-ask-password     Do not prompt for password
  -H --host=[USER@]HOST    Operate on remote host
  -M --machine=CONTAINER   Operate on local container
     --adjust-system-clock Adjust system clock when changing local RTC mode

Commands:
  status                   Show current time settings(檢視時間時區資訊)
  set-time TIME            Set system time(設定當前時間)
  set-timezone ZONE        Set system time zone(設定時區)
  list-timezones           Show known time zones(列舉所有可選時區)
  set-local-rtc BOOL       Control whether RTC is in local time
  set-ntp BOOL             Control whether NTP is enabled(開啟NTP時鐘同步)

# 設定伺服器時區為上海時區
# timedatectl set-timezone Asia/Shanghai
# 檢視設定結果
# timedatectl status
# 檢視時間
# date

2、通過chryon開啟時鐘同步

chryon分為Server和Client兩種，Client向Server發起同步

修改/etc/chrony.conf配置檔案

server ntp.cloud.aliyuncs.com minpoll 4 maxpoll 10 iburst
server ntp.aliyun.com minpoll 4 maxpoll 10 iburst
server ntp1.aliyun.com minpoll 4 maxpoll 10 iburst
server ntp1.cloud.aliyuncs.com minpoll 4 maxpoll 10 iburst
server ntp10.cloud.aliyuncs.com minpoll 4 maxpoll 10 iburst
server ntp11.cloud.aliyuncs.com minpoll 4 maxpoll 10 iburst
server ntp12.cloud.aliyuncs.com minpoll 4 maxpoll 10 iburst
server ntp2.aliyun.com minpoll 4 maxpoll 10 iburst
server ntp2.cloud.aliyuncs.com minpoll 4 maxpoll 10 iburst
server ntp3.aliyun.com minpoll 4 maxpoll 10 iburst
server ntp3.cloud.aliyuncs.com minpoll 4 maxpoll 10 iburst
server ntp4.aliyun.com minpoll 4 maxpoll 10 iburst
server ntp4.cloud.aliyuncs.com minpoll 4 maxpoll 10 iburst
server ntp5.aliyun.com minpoll 4 maxpoll 10 iburst
server ntp5.cloud.aliyuncs.com minpoll 4 maxpoll 10 iburst
server ntp6.aliyun.com minpoll 4 maxpoll 10 iburst
server ntp6.cloud.aliyuncs.com minpoll 4 maxpoll 10 iburst
server ntp7.cloud.aliyuncs.com minpoll 4 maxpoll 10 iburst
server ntp8.cloud.aliyuncs.com minpoll 4 maxpoll 10 iburst
server ntp9.cloud.aliyuncs.com minpoll 4 maxpoll 10 iburst

然後重啟chronyd服務

# systemctl restart chronyd
# systemctl status chronyd

檢測chronyd是否生效

# chronyc sources
# chronyc sourcestats