配置fastDfs时的坑：CentOs7上重启防火墙报Unit not found或者Job for iptables.service failed because the control pr...

配置fastDfs时的坑：CentOs7上重启防火墙报

Unit not found

或者

Job for iptables.service failed because the control process exited with error 
code. See "systemctl status iptables.service" and "journalctl -xe" for details.

参考博客：

CentOs7与CentOs6的差异问题https://www.cnblogs.com/faunjoe88/p/7003815.html

centos7默认的防火墙是firewalld防火墙，不是使用iptables，所以要先关闭firewalld，再开启iptables
https://blog.csdn.net/sinat_29821865/article/details/80982250