I was trying to set up a cron job and found an error in the tutorial regarding Siteground hosting. The command line should read:

/usr/bin/wget -O /dev/null "http://yoursite.com/index.php?option=com_easysocial&cron=1";

and not

/bin/wget -O /dev/null "http://yoursite.com/index.php?option=com_easysocial&cron=1";