systemctl stop firewalld && systemctl disable firewalld && sed -i 's/enforcing/disabled/' /etc/selinux/config && yum install -y ntpdate && ntpdate time.windows.com
centos7 turn off the firewall -selinux- time synchronization commands - executed directly - no script - simple and efficient
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Origin blog.51cto.com/3611073/2454972
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