I know this is an 'old' thread, but the following might be useful for some.
For anyone running Mac OS X (I'm using 10.4 "Tiger"), I have had good results using this command:
*/5 * * * * curl http://your_domain.com/moodle/admin/cron.php
in crontab. It seems to be working fine - as long as my computer is on, of course.
Teaching with Moodle
Automatic emails from forums, how do you set it up?
Гэтае абмеркаваньне было заблакавана, таму вы болей ня можаце адказваць на яго.