MySQL如果忘记了root密码，可以很方便的找回，方法如下：

1.???? 先杀掉MySQL的所有进程；

#killall -TERM mysqld

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2.??? 使用skip-grant-tables这个选项启动MySQL;

#/user/bin/safe_mysqld --skip-grant-tables &

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3.? 这时你就可以不使用密码登陆MySQL了；

#mysql -h localhost -u root -p

mysql> use mysql

mysql> update user set password=password('newpassword') where user='root';?

mysql> flush privileges;

mysql> exit;?

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4.??? 关闭MySQL；

?#/user/bin/mysqladmin -u root -p shutdown

Enter password:
STOPPING server from pid file /usr/local/mysql/data/ws01.pid
071218 11:30:19? mysqld ended

[1]+? Done??????????????????? /usr/local/mysql/bin/safe_mysqld --skip-grant-tables? (wd: /ceno/product/cacti/include)
(wd now: /usr/local/mysql/bin)

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5.??? 正常启动MySQL；?

#/user/bin/mysqld_safe --user=mysql &

?[1] 5583
Starting mysqld daemon with databases from /usr/local/mysql/data

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6.??? 现在赶快试试你的新密码吧；?