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HomeDatabaseMysql Tutorial[mysql]重装windows后恢复mysql及"Accessdeniedfor_MySQL

mysql数据库实际上是绿色软件,重装系统后还是可以继续使用的。

1、重装系统后保留原先的mysql安装目录和数据目录。

2、制作一个批处理文件用于启动mysql:【run.bat】该文件存放在mysql安装目录下的bin下。

mysqld.exe --defaults-file=../my-default.ini --console

3、执行run.bat即可。

如果连接数据库时出现以下错误:"Access denied for user'root'@'IP'"

1. 管理员登陆系统,停止mysql服务或者结束mysqld进程
2. 进入命令行,来到mysql的安装目录.假设安装目录为 d:/mysql/ , CMD进入命令行
3. 运行 d:/mysql/bin/mysqld-nt --skip-grant-tables 启动mysql,关闭权限的检查

4. 运行 d:/mysql/bin/mysqladmin -u root flush-privileges password 搜索"newpassword" 重设root密码
5. 重新启动mysql服务

Linux系统下可以采用以下方式:

方法一:
# /etc/init.d/mysql stop
# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
# mysql -u root mysql
mysql> UPDATE user SET Password=PASSWORD(’newpassword’) where USER=’root’;
mysql> FLUSH PRIVILEGES;
mysql> quit
# /etc/init.d/mysql restart
# mysql -uroot -p
Enter password:
mysql>
方法二:
直接使用/etc/mysql/debian.cnf文件中[client]节提供的用户名和密码:
# mysql -udebian-sys-maint -p
Enter password:
mysql> UPDATE user SET Password=PASSWORD(’newpassword’) where USER=’root’;
mysql> FLUSH PRIVILEGES;
mysql> quit
# mysql -uroot -p
Enter password:
mysql>


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