进入MySQL时报错：
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) denied for user 'root'@'localhost' (using password: NO)
解决方法：
1.停止MySQL服务：service mysql stop
2.终端输入：mysqld_safe --user=mysql --skip-grant-tables --skip-networking & mysql -u root mysql
3.修改新密码
mysql>UPDATE user SET Password=PASSWORD('你的新密码') where USER='root';
4.刷新MySQL的系统权限相关表
mysql> FLUSH PRIVILEGES;
5.mysql -u root -p
输入新密码
