mysql忘记密码
解决：
1)sudo service mysql stop
2)sudo mysqld_safe --skip-grant-tables &
3)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> exit
5)sudo service mysql start