Cronjobs

Hello,

After looking on the forum, I did enter in DirectAdmin this cronjob:

index.php?option=com_easysocial&cron=true" >/dev/null 2>&1

But I am receiving always this error:

/bin/sh: -c: line 0: unexpected EOF while looking for matching `"'

/bin/sh: -c: line 1: syntax error: unexpected end of file

What should the exact cronjob be?

Thanks