Centos7上，对MySQL5.7开启远程连接。
1.修改/etc/my.cnf
[mysqld]
validate_password=off
2.命令行进入mysql
use mysql;
GRANT ALL ON *.* TO username@'%' IDENTIFIED BY 'password' WITH GRANT OPTION; flush privileges;//重要
3.与防火墙有关
firewall-cmd --zone=public --add-port=3306/tcp --permanent firewall-cmd --reload
4.在Navicat中连接就可以了。
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