安装时间同步服务chrony

安装时间同步服务chrony的步骤如下：

1.使用以下命令安装chrony：

yum install chrony -y

2.安装完成后，使用以下命令启动chrony服务并设置开机自启动：

systemctl start chronyd
systemctl enable chronyd

3.如果需要配置chrony服务器，可以编辑/etc/chrony.conf文件进行配置。例如，如果需要将本机作为时间同步服务器，可以在文件中添加以下内容：

# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
server 0.centos.pool.ntp.org iburst
server 1.centos.pool.ntp.org iburst
server 2.centos.pool.ntp.org iburst
server 3.centos.pool.ntp.org iburst

# Ignore stratum in source selection.
stratumweight 0

# Record the rate at which the system clock gains/losses time.
driftfile /var/lib/chrony/drift

# Enable kernel RTC synchronization.
rtcsync

# In first three updates step the system clock instead of slew
makestep 1 -1

# 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

4.编辑完成后，使用以下命令重启chrony服务使配置生效：

systemctl restart chronyd