bsyonline 2016/10/21 Comments CentOS Linux CentOs 7 filewall 简单命令。 启动systemctl start firewalld 停止systemctl stop firewalld 删除systemctl disable firewalld 查看所有打开端口firewall-cmd --zone=dmz --list-ports 加入端口firewall-cmd --zone=dmz --add-port=8080/tcp Ubuntu 16.04 修复 grub CentOS 7 环境升级