背景
最近阿里云会迁移IDC机房，整理Linux wiki线，简单录下来备用~
固定
# 默认已经安装$ yum install -y chrony
配置文件
$ cat /etc/chrony.conf# Use public servers from the pool.ntp.org project.# Please consider joining the pool (http://***.pool.ntp.org/join.html).# 国家服务器server 0.cn.pool.ntp.orgserver 1.cn.pool.ntp.orgserver 2.cn.pool.ntp.orgserver 3.cn.pool.ntp.org# 阿里server ntp.aliyun.com# 腾讯server time1.cloud.tencent.comserver time2.cloud.tencent.comserver time3.cloud.tencent.comserver time4.cloud.tencent.comserver time5.cloud.tencent.com# 苹果server time.asia.apple.com# 微软server time.windows.com# 其他server cn.ntp.org.cn# Record the rate at which the system clock gains/losses time.driftfile /var/lib/chrony/drift# Allow the system clock to be stepped in the first three updates# if its offset is larger than 1 second.***kestep 1.0 3# Enable kernel synchronization of the real-time clock (RTC).rtcsync# Enable hardware timestamping on all inte***ces that support it.#hwtimestamp *# Increase the minimum number of selectable sources required to adjust# the system clock.#minsources 2# Allow NTP client access from local network.#allow 192.168.0.0/16# Serve time even if not synchronized to a time source.#local stratum 10# Specify file containing keys for NTP authentication.#keyfile /etc/chrony.keys# Specify directory for log files.logdir /var/log/chrony# Select which infor***tion is logged.#log measurements statistics tracking
启动服务并设置时区。
# 启动服务$ systemctl start chronyd# 开机启动$ systemctl enable chronyd# 查看当前状态$ systemctl status chronyd# 查看亚洲时区$ timedatectl list-timezones | grep Asia# 设置时区$ timedatectl set-timezone Asia/Shanghai
认证服务
# 查看现有的时间服务器$ chronyc sources -v# 查看时间服务器状态$ chronyc sourcestats -v# 显示时钟同步相关参数$ chronyc tracking# 查看当前时区及时间$ timedatectl
手动同步时间
# 使用 ntpdate 同步时间$ ntpdate ntp.aliyun.com# chronyd 未启动时，如下命令同步时间$ chronyd -q 'server pool.ntp.org iburst'# chronyd 启动时，使用如下命令同步时间$ chronyc -a 'burst 4/4' && sleep 10 && chronyc -a ***kestep
手动设置时间
# date 设置时间$ date -s '2021-06-03 19:00:00'# 关闭 ntp 同步后，才可以使用 timedatectl 进行时间设置$ timedatectl set-ntp false# 设置日期和时间$ timedatectl set-time '2021-06-03 19:00:00'# 设置日期$ timedatectl set-time '2021-06-03'# 设置时间$ timedatectl set-time '19:00:00'# 设置完成后，再开启$ timedatectl set-ntp true
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