NTP服务器收集

阿里云

内网:
ntp.cloud.aliyuncs.com
ntp1.cloud.aliyuncs.com
ntp2.cloud.aliyuncs.com
ntp3.cloud.aliyuncs.com
ntp12.cloud.aliyuncs.com
公网:
ntp.aliyun.com
ntp1.aliyun.com
ntp7.aliyun.com

腾讯云

内网:
ntpupdate.tencentyun.com
公网:
time1.cloud.tencent.com 
time2.cloud.tencent.com 
time3.cloud.tencent.com
time4.cloud.tencent.com
time5.cloud.tencent.com

CentOS配置NTP命令

systemctl stop ntpd
systemctl disable ntpd
systemctl stop chronyd
systemctl disable chronyd
echo 'server ntpupdate.tencentyun.com' > /etc/ntp.conf
systemctl start ntpd
systemctl enable ntpd
systemctl start chronyd
systemctl enable chronyd