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https://blog.csdn.net/weihaodong0557/article/details/113805838
show variables like 'have%'; //查看hava_openssl
mkdir /home/work/mysql_3306/ssl/
/home/work/mysql_3306/bin/mysql_ssl_rsa_setup --datadir=/home/work/mysql_3306/ssl
vi my-3308.cnf
[mysqld]
ssl-ca=/home/work/mysql_3306/ssl/ca.pem
ssl-cert=/home/work/mysql_3306/ssl/server-cert.pem
ssl-key=/home/work/mysql_3306/ssl/server-key.pem
show variables like 'ver%'; // 查看版本信息
show variables like 'wait%'; //查看登錄超時時間
show variables like 'gener%'; //查看日誌是否開啓
show variables like 'validate_password%'; //查看是否有密碼複雜度插件
install plugin validate_password soname 'validate_password.so';
uninstall plugin validate_password;
use mysql; //查詢數據庫表之前需登錄到數據庫
select * from user \G; //查看user表
show databases;
show tables;
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