mysql的1045错误，安装后不能登陆问题

首先登陆

mysql -h 127.0.0.1 -P 4000 -u root -D test

 show databases;

然后：

如果ip地址问题
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'test' WITH GRANT OPTION;
flush privileges;
如果没有密码:
use mysql;

update user set password=password('111111') where user='root';

flush privileges;