一、关闭MySQL
killall mysqld
二、以跳过权限表的方式启动MySQL
/usr/local/mysql/bin/mysqld_safe --skip-grant-tables &
三、进入MySQL，修改密码
/usr/local/mysql/bin/mysql -u root
mysql>use mysql;
mysql>update user set password=password("new_pass") where user="root";
mysql>flush privileges;
mysql>exit
