MySQL根用户root密码忘记后的处理方法
Windows平台下的步骤 1.以管理员的身份登录到windows系统 2.用windows服务管理工具或任务管理器来停止MySQL服务 3.建立一个单行的文本文件,保存为c:mysqlpwdhf.txt, 内容是SET PASSWORD FOR 'root'@'localhost' = PASSWORD('MyNewPassword'); 4.打开一个控
Windows平台下的步骤
1.以管理员的身份登录到windows系统
2.用windows服务管理工具或任务管理器来停止MySQL服务
3.建立一个单行的文本文件,保存为c:mysqlpwdhf.txt,
内容是SET PASSWORD FOR 'root'@'localhost' = PASSWORD('MyNewPassword');
4.打开一个控制台窗口,得到DOS命令提示符
5.假设你的MySQL主目录是C:/mysql/bin,
则运行c:mysqlbinmysqld-nt --init-file=c:mysqlpwdhf.txt,
如果是用安装精灵安装的MySQL数据库服务器,则需要通过服务管理工具来做改动,
需要找到并添加默认设置文件,
然后运行mysqld-nt --defaults-file="pathmy.ini" --init-file=c:mysqlpwdhf.txt
6.停止MySQL数据库服务,然后再重新以正常模式启动MYSQL
7.可以正常登录到服务器.
Unix环境下的步骤
1.以root或启动mysqld进程的用户身份登录到系统
2.找到并定位包含Mysql服务进程号的文件.pid,该文件一般可能
/var/lib/mysql/,/var/run/mysqld/,/usr/local/mysql/data/中,
文件名一般是“机器名.pid”的格式。在壳下使用命令
kill 'cat /mysql-data-directory//host-name.pid'来结束mysql服务进程
3.建立一个单行文本文件,可以任意命名,假设是mysql-init,
保存在用户主目录~下就可以,,
文件内容是SET PASSWORD FOR 'root'@'localhost' = PASSWORD('MyNewPassword');
4.重新带选项启动mysql,具体命令为mysqld_safe --init-file=~/mysql-init &,
正常后应该删除mysql-init文件
5.可以用新密码连接数据库。
通用的解决办法:
-使用客户端交互工具mysql来设置,步骤如下:
1.停止mysql服务,并重新以--skip-grand-table --user=root
选项来启动mysql服务(windows下可以省略--user=root选项)
2.用客户端交互工具mysql连接服务器,shell>mysql -u root
3.在客户端交互工具mysql中执行下列语句:
mysql> UPDATE mysql.user SET Password=PASSWORD('newpwd')
-> WHERE User='root';
mysql> FLUSH PRIVILEGES;
4.可以用newpwd作为密码来登录服务器。

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