Job for firewalld.service failed because a timeout was exceeded. See "systemctl status firewalld.ser

centos7.3输入所有有关 firewall-cmd 命令将会出现 Job for firewalld.service failed because a timeout was exceeded.See "systemctl status firewalld.service" and "journalctl -xe" for details. 的错误 原因:centos7 里面装了Python
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