1. Open & Edit /etc/my.cnf
2. Add skip-grant-tables under [mysqld]
3. Restart Mysql
4. You should be able to login to mysql now using the below command mysql -u root -p
5. Run mysql> flush privileges;
6. Set new password by ALTER USER ‘root‘@‘localhost‘ IDENTIFIED BY ‘NewPassword‘;
7. Go back to /etc/my.cnf and remove/comment skip-grant-tables
8. Restart Mysql
9. Now you will be able to login with the new password mysql -u root -p

新装mysql数据库登陆不上去（账号密码正确）