// 打开openssl
openssl
// 生成私钥
genrsa -out rsa_private_key.pem 1024
// 转化pkcs8文件
pkcs8 -topk8 -inform PEM -in rsa_private_key.pem -outform PEM -nocrypt -out rsa_private_key_pkcs8.pem
// 生成公钥
rsa -in rsa_private_key.pem -pubout -out rsa_public_key.pem
// 生成 .der 文件
req -new -out cert.csr -key rsa_private_key.pem // 根据提示输入相关信息 => CN => Beijing => Fengtai => Drex
// 自签署根证书
x509 -req -in cert.csr -out rsa_public_key.der -outform der -signkey rsa_private_key.pem -days 3650
// 关闭openssl
exit

// 停止 mysql server.  通常是在 '系统偏好设置' > MySQL > 'Stop MySQL Server'或者:
sudo /usr/local/mysql/support-files/mysql.server stop
// 打开终端，输入：
sudo /usr/local/mysql/bin/mysqld_safe --skip-grant-tables
3.  打开另一个新终端，输入:
sudo /usr/local/mysql/bin/mysql -u root
UPDATE mysql.user SET authentication_string=PASSWORD('新密码') WHERE User='root';
LUSH PRIVILEGES;
\q
// 重启
sudo /usr/local/mysql/support-files/mysql.server restart