Home Database Mysql Tutorial MySQL忘记root密码的解决方法_MySQL

MySQL忘记root密码的解决方法_MySQL

Jun 01, 2016 pm 01:48 PM
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MySQL忘记root密码的解决方法 Linux下的解决方法:    一. MySQL密码的恢复方法之一     如果忘记了MySQL的root密码,可以用以下方法重新设置:     1. KILL掉系统里的MySQL进程;        killall -TERM mysqld     2. 用以下命令启动MySQL,以不检查权限的方式启动;        safe_mysqld --skip-grant-tables &      3. 然后用空密码方式使用root用户登录 MySQL;        mysql -u root     4. 修改root用户的密码;        mysql> update mysql.user set password=PASSWORD('新密码') where User='root';        mysql> flush privileges;        mysql> quit     重新启动MySQL,就可以使用新密码登录了。  二. MySQL密码的恢复方法二     有可能你的系统没有 safe_mysqld 程序(比如我现在用的 ubuntu操作系统, apt-get安装的mysql) , 下面方法可以恢复     1. 停止mysqld;        /etc/init.d/mysql stop       (您可能有其它的方法,总之停止mysqld的运行就可以了)     2. 用以下命令启动MySQL,以不检查权限的方式启动;        mysqld --skip-grant-tables &      3. 然后用空密码方式使用root用户登录 MySQL;        mysql -u root     4. 修改root用户的密码;        mysql> update mysql.user set password=PASSWORD('newpassword') where User='root';        mysql> flush privileges;        mysql> quit     重新启动MySQL        /etc/init.d/mysql restart 就可以使用新密码 newpassword 登录了。    Windows下的解决方法:  1、编辑MySQL的配置文件:my.ini 一般在MySQL安装目录下有my.ini即MySQL的配置文件。 在此配置文件的最后添加如下一行: skip-grant-tables 保存退出编辑。  2、然后重启MySQL服务 在命令行下执行: net stop MySQL net start MySQL  3、设置新的ROOT密码 然后再在命令行下执行: MySQL -u root -p MySQL或mysql -u root -p 直接回车无需密码即可进入数据库了。  此时,在命令行下执行 use mysql; 现在我们执行如下语句把root密码更新为: update user set password=password("root") where user="root"; (注意:此时不用使用mysqladmin -u root -p password '你的新密码'这条命令修改密码,因为'skip-grant-tables'配置, 不信的话,你可以试用一下,它肯定会报如下所示的错误:  F:/Documents and Settings/long>mysqladmin -u root -p password 'root' Enter password: Warning: single quotes were not trimmed from the password by your command line client, as you might have expected. mysqladmin: You cannot use 'password' command as mysqld runs with grant tables disabled (was started with --skip-grant-tables). Use: "mysqladmin flush-privileges password '*'" instead) exit 退出MySQL。  4、还原配置文件并重启服务    然后修改MySQL配置文件把刚才添加的那一行'skip-grant-tables'删除。 再次重起MySQL服务,密码修改完毕。 用新密码root试一下吧,又能登入重新进入mysql了. bitsCN.com

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