如何重置mysql的密码

如何重置mysql的密码

如果知道密码，则通过以下方式修改；

    gaurav@gaurav:~$ mysql --user=root --pass mysql
    Enter password:

    mysql> update user set Password=PASSWORD('new-password-here') WHERE User='root';
    Query OK, 2 rows affected (0.04 sec)
    Rows matched: 2  Changed: 2  Warnings: 0

    mysql> flush privileges;
    Query OK, 0 rows affected (0.02 sec)

    mysql> exit
    Bye

如果忘记密码，则先停止mysql，然后加上参数skip-grant-tables重新启动mysql server

    root@gaurav:~# /etc/init.d/mysql stop

    Now you should start up the database in the background, via the mysqld_safe command:

    root@gaurav:~# /usr/bin/mysqld_safe --skip-grant-tables &
    [1] 4271
    Starting mysqld daemon with databases from /var/lib/mysql
    mysqld_safe[6763]: started

然后登陆mysql，修改密码

    root@gaurav:~$ mysql --user=root mysql
    Enter password:

    mysql> update user set Password=PASSWORD('new-password-here') WHERE User='root';
    Query OK, 2 rows affected (0.04 sec)
    Rows matched: 2  Changed: 2  Warnings: 0

    mysql> flush privileges;
    Query OK, 0 rows affected (0.02 sec)

    mysql> exit
    Bye

最后重启mysql server就可以了。

    root@gaurav:~# /etc/init.d/mysql start
    Starting MySQL database server: mysqld.
    Checking for corrupt, not cleanly closed and upgrade needing tables..

用新密码登陆验证下

    root@gaurav:~# mysql --user=root --pass=new-password-here
    Welcome to the MySQL monitor.  Commands end with ; or \g.
    Your MySQL connection id is 5 to server version: 5.0.24a-Debian_4-log

    Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

    mysql> exit
    Bye