Setting up a Cron Job for the Feed Importer

I am trying to setup the cron job for the feed importer following the doco and I cannot get it to work. I setup the cron job command as usr/bin/wget -O /dev/null "http://yoursite.com/index.php?option=com_easyblog&task=cron"; like the doco says and it doesn't work. I contacted my hosting provider and they said: "The link that you have provided is not a command that can be used.You have to include a URL to get, and even if you did, it would be writing it to /dev/null which is like deleting it.". What command am I supposed to use to get the Feeds to import?