如输入命令报错如下

原因是由于时间服务器时间不对导致
使用该命令即可同步成功
yum install -y chrony
firewall-cmd --zone=public --add-port=123/udp --permanent && firewall-cmd --reload
cat > /etc/chrony.conf << EOF
server cn.pool.ntp.org iburst
stratumweight 0
driftfile /var/lib/chrony/drift
rtcsync
makestep 10 3
allow 0.0.0.0/0
bindcmdaddress 127.0.0.1
bindcmdaddress ::1
keyfile /etc/chrony.keys
commandkey 1
generatecommandkey
noclientlog
logchange 0.5
logdir /var/log/chrony
EOF
systemctl restart chronyd
systemctl enable chronyd
chronyc sources -v