crontab

http://www.magentocommerce.com/wiki/1_-_installation_and_configuration/how_to_setup_a_cron_job

https://support.sweettoothrewards.com/entries/21196536-Setting-up-CRON-Jobs-in-Magento

 

http://stackoverflow.com/questions/5290868/how-would-test-cron-with-magento

 

http://www.magentocommerce.com/magento-connect/cron-profiles.html

http://www.magentocommerce.com/magento-connect/aoe-scheduler.html

 

http://www.magentocommerce.com/magento-connect/cron-doctor-8697.html

http://www.magentocommerce.com/magento-connect/noovias-cronjob-manager.html