修改mysql密码

一:正常修改
1.关闭mysql服务
sudo /usr/local/mysql/support-files/mysql.server stop
2.使用安全模式启动mysql
sudo /usr/local/mysql/bin/mysqld_safe --skip-grant-tables
3.使用root账号登录mysql服务
/usr/local/mysql/bin/mysql u root
4.修改root账号的密码
update mysql.user set authentication_string=password(‘qingyun1’) where user=‘root’ and Host = ‘localhost’;
5.flush privileges;
6.关闭安全模式,正常的重启mysql
sudo /usr/local/mysql/support-files/mysql.server restart
7.正常的使用root账号和密码连接mysql
/usr/local/mysql/bin/mysql -u root -p

二:忘记密码,强行修改
1.停止Mysql服务
sudo /usr/local/mysql/support-files/mysql.server stop
2.进入终端输入:
cd /usr/local/mysql/bin/
3. 切换管理员权限(如果当前就是root,则不用)
4. sudo su
5.输入以下命令来禁止mysql验证功能
./mysqld_safe --skip-grant-tables (回车后mysql会自动重启)
5. 输入以下命令
./mysql
6.输入命令
FLUSH PRIVILEGES;

7.回车,输入命令 ALTER USER ‘root’@‘localhost’ IDENTIFIED BY ‘你的新密码’;

三:

  1. 停止 mysql server.
    可以在 ‘系统偏好设置’ > MySQL > 'Stop MySQL Server’可以在 ‘系统偏好设置’ > MySQL > ‘Stop MySQL Server’
    或者: sudo /usr/local/mysql/support-files/mysql.server stop
  2. 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’;
    FLUSH PRIVILEGES;
    \q
  4. 重启 sudo /usr/local/mysql/support-files/mysql.server restart

注意:
*以上方法针对 mysql V5.7.9, 旧版的mysql请使用:UPDATE mysql.user SET Password=PASSWORD(‘新密码’) WHERE User=‘root’;

你可能感兴趣的:(mysql)