it crashed while I was editing the /etc/php5/apache2/php.ini file. I have a backup, but I think it's old -- since before an os upgrade. Would it still work or is there anything I can do to replace the file? I'm afraid to restart because it will screw up all of the websites if it's wrong. Please help.
What do you mean with "crahsed"? Is the server not running not anymore, or did your php.ini get deleted somehow?