Error 2003: Can't connect to MySQL server on (X)

Cause

This error message usually appears, when mysql server is not running.

Solutions

Restarting MySQL server simply solves the problem.

Solution for Windows

1. Open Control Panel.
2. Go to Administrative Tools -> Services.
3. Find MySQL in the list of services.
4. Right click on MySQL and choose Start.

Solution for Linux

Run the "mysqld" command in Terminal and it will start the MySQL server.