updating the index via the shell
 

I am trying to update my index via the shell. When I input the command it gives me nothing. Is it suppose to return me to a prompt or do I get some kind of output. Any suggestions would be appreciated.

In my case the update via shell is:

php -f /home/my_account_folder/public_html/phpdig_dir/admin/spider.php urls.txt >> spider.log

and works perfectly, don't prompt anything... when the spidering finishes only read the spider.log to see the errors...
The only problem that I have is the error 404 in some pages that exists... I don't now how to fix this problem...