I have logged in via ssh/putty to the website, then cd public_html after this i'm putting these commands:
(php indexer.php --reindex catalog_product_attribute)
But nothing happens ,got an error that could not find indexer.php. So i just took a look on public_html folder in cpanel there is no folder named indexer.php but php.index and php.index.sample. Anybody can help.

Thanks.