systemctl start firewalld.service
systemctl status firewalld.service
systemctl stop firewalld.service
systemctl enable firewalld.service
systemctl disable firewalld.service
查看开放的端口号
firewall-cmd --list-all
设置开放的端口号
firewall-cmd --add-service=http --permanent
firewall-cmd --add-port=80/tcp --permanent
重启防火墙
firewall-cmd --reload
select * from mysql.user where user=‘li4‘ and host=‘%‘;
grant all privileges on *.* to li4@‘%‘ identified by ‘123123‘;
原文:https://www.cnblogs.com/Objecting/p/12639371.html