[2014-04-29 14:08:06] log.ERROR: exception 'InvalidArgumentException' with message 'Command "db:migrate" is not defined.

Did you mean this?
    migrate' in /users/webhome/nauzerk/learningcentre/vendor/symfony/console/Symfony/Component/Console/Application.php:617
Stack trace:
#0 /users/webhome/nauzerk/learningcentre/vendor/symfony/console/Symfony/Component/Console/Application.php(188): Symfony\Component\Console\Application->find('db:migrate')
#1 /users/webhome/nauzerk/learningcentre/vendor/symfony/console/Symfony/Component/Console/Application.php(121): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#2 /users/webhome/nauzerk/learningcentre/artisan(59): Symfony\Component\Console\Application->run()
#3 {main} [] []