ERROR 2003 (HY000): Can t connect to MySQL server on localhost:3306 (10061)

This error message indicates that the MySQL server is not running or is not accessible on the specified port (3306) on the local machine. Possible causes of this error include:

1. The MySQL server is not running: You need to start the MySQL server by running the appropriate command for your operating system.

2. The MySQL server is running on a different port: Check if the MySQL server is running on a different port by looking at the configuration file.

3. Firewall or security software blocking the connection: Check if there is any firewall or security software that is blocking the connection to the MySQL server.

4. Incorrect MySQL server credentials: Check if you have provided the correct username and password to connect to the MySQL server.

5. Incorrect hostname or IP address: Check if you have provided the correct hostname or IP address to connect to the MySQL server.

To resolve this error, you should first check if the MySQL server is running and accessible on the specified port. If the server is running and accessible, then you should check for any firewall or security software that may be blocking the connection to the server. If you are still unable to connect, then you should check if you have provided the correct credentials, hostname or IP address.