SQLSTATE[HY000] [1698] Access denied for user 'root'@'localhost'

Question

I just installed Ubuntu 16.04 and installed web server on it. Everything works well, but I cannot access database. Even if I create new user and grant all privileges, I can\

Answer 1

Just Create New User for MySQL do not use root. there is a problem its security issue

sudo mysql -p -u root

Login into MySQL or MariaDB with root privileges

CREATE USER 'troy121'@'%' IDENTIFIED BY 'mypassword123';

login and create a new user

GRANT ALL PRIVILEGES ON *.* TO 'magento121121'@'%' WITH GRANT OPTION;

and grant privileges to access "." and "@" "%" any location not just only 'localhost'

exit;

if you want to see your privilege table SHOW GRANTS; & Enjoy.