Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [K] [L] [M] [N] [O] [P] [R] [S] [T] [U] [V] [W] handlers [See content handlers, defining.] hdparm utility Header directive headers malformed header from script errors manipulating in reverse proxies passing proxy information premature end of script headers errors hiding backend servers Host: headers, name-based virtual hosts and [See also name-based virtual hosts.] hosting [See virtual hosts.] HostNameLookups directive 2nd hostnames IP addresses, replacing with hostnames resolving hotlinking, access control for .htaccess files, allowing users self-protection [See also per-directory configuration files.] htdbm htdocs/ directory, publishing content HTML, validating with Tidy htpasswd utility HTTP content negotiation DAV and methods, restricting for access control httpd -M httpd -S httpd -V httpd process httpd.conf [See configuration files (Apache).] httpd.pid Overwritten log entries HTTPS [See also SSL.] HUP, kill command and |