MySQL忘记root密码

To reset a root password that you forgot (using paths on our system):

[root@host root]#killall mysqld [root@host root]#/usr/libexec/mysqld -Sg --user=root &

You may have better luck with:

mysqld --skip-grant-tables --user=root

Go back into MySQL with the client:

[root@host root]# mysql Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 1 to server version: 3.23.41 Type 'help;' or 'h' for help. Type 'c' to clear the buffer. mysql> USE mysql Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> UPDATE user -> SET password=password("newpassword") -> 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 (0.01 sec) mysql> exit; [root@host root]#killall mysqld

Start MySQL the normal way for your system, and all is good. For Red Hat this is:

/etc/init.d/mysqld start