How to Fix \'SQLSTATE[HY000] [1698] Access denied for user \'root\'@\'localhost\'\' Error in Ubuntu 16.04?

Troubleshooting "SQLSTATE[HY000] [1698] Access denied for user 'root'@'localhost'" Error in Ubuntu 16.04

Introduction:

When attempting to access a MySQL database from PHP or phpMyAdmin, you may encounter the following error:

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

This error indicates that the user attempting to connect to the database lacks the necessary privileges.

Solution:

A recent change in MySQL 5.7 prevents the root user from connecting to the database without elevated privileges. To resolve this issue, follow these steps:

1. Create a New User with Privileges:

CREATE USER 'newuser'@'localhost' IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON *.* TO 'newuser'@'localhost' WITH GRANT OPTION;

2. Update Your PHP Code:

Modify the PHP code to connect using the new user credentials:

<code class="php">protected $name = 'newuser';
protected $pass = 'password';</code>

3. Connect Using Sudo:

If you wish to continue using the root user, you will need to elevate your privileges by running commands with sudo:

<code class="sh">sudo mysql -u root</code>

Additional Considerations:

• Ensure that the new user has the required privileges for the database operations you intend to perform.
• If you encounter any further issues, consult the MySQL documentation or seek support from the MySQL community.

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