PDOException: How to Fix 'No such file or directory' Database Connection Errors in Laravel?

PDOException: Troubleshooting "No such file or directory" Error

The "PDOException SQLSTATE[HY000] [2002] No such file or directory" error indicates that the database connection cannot be established. This issue is commonly encountered when executing commands like "php artisan migrate" or "php artisan db:seed" through SSH.

Causes and Solutions:

MySQL Server Not Running:

• Ensure that the MySQL server is running. If it's not, start the server before proceeding.

Database Configuration Issue (Laravel 4):

• In the "app/config/database.php" file, change the "host" value from "localhost" to "127.0.0.1".

Database Configuration Issue (Laravel 5 ):

• In the ".env" file, change the "DB_HOST" value from "localhost" to "127.0.0.1".

Additional Troubleshooting:

If the above solutions don't work, consider the following:

• Check the database credentials and ensure they are correct.
• Verify that the database user has the necessary permissions to access the database.
• Disable any firewalls or security software that may interfere with database connectivity.
• Flush the Laravel cache using the "php artisan cache:clear" command.

Unix Socket vs. TCP Connection:

Setting the "host" value to "127.0.0.1" forces a TCP connection, which is more reliable than the default UNIX socket connection. This overcomes the issue where the database may not be found in the standard directory using a UNIX socket.

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