linux下忘记mysql root密码的解决方法
1、结束当前正在运行的mysql进程。

# service mysqld stop

2、用mysql安全模式运行并跳过权限验证。

# mysqld_safe --skip-grant-tables &

3、以root身份登录mysql。

# mysql -u root

4、修改root用户口令。

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('root') where User ='root';
Query OK, 3 rows affected (0.00 sec)
Rows matched: 3  Changed: 3  Warnings: 0

mysql> flush privileges;
mysql> quit;

mysql> exit

5、结束mysql安全模式，用正常模式运行mysql。

# service mysqld restart