: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)

This error message usually occurs when the MySQL server is not running or is not configured correctly. Here are a few steps you can try to resolve the issue:

1. Verify if the MySQL server is running: You can use the following command to check the status of the MySQL service:

   systemctl status mysql

If it's not running, start the service using:

   sudo systemctl start mysql

2. Check the MySQL configuration file: Open the MySQL configuration file (usually located at `/etc/mysql/mysql.conf.d/mysqld.cnf`) and look for the line that specifies the socket file. It should be something like `socket=/tmp/mysql.sock`. Make sure the path to the socket file is correct.

3. Check if the socket file exists: Run the following command to check if the socket file exists:

   ls /tmp/mysql.sock

If it doesn't exist, it means that the MySQL server is not creating the socket file properly. In that case, you may need to reinstall MySQL or check the server logs for any errors.

4. Restart the MySQL service: After making any changes to the configuration file, restart the MySQL service using the following command:

   sudo systemctl restart mysql

If none of these steps work, it's recommended to consult the MySQL documentation or seek help from a database administrator to further troubleshoot the issue.