1、查看防火墙:
systemctl status firewalld。
2、临时操作:
systemctl start firewalld
systemctl stop firewalld
3、永久生效,但是需要重启:
systemctl enable firewalld
systemctl disable firewalld
4、systemd有重启次数限制,如下命令可以复位重启次数
/bin/systemctl reset-failed ceph-mon@`hostname`.service
来源:CSDN
作者:学无止境966
链接:https://blog.csdn.net/qq_23929673/article/details/94059561