I updated to Ubuntu 13.10 (from Ubuntu 13.04) last weekend, and now Apache is not being able to start. It was working perfectly well until the upgraded, and I haven't changed anything myself.
When I ran a restart this is what I get
apache2: Syntax error on line 260 of /etc/apache2/apache2.conf: Could not open configuration file /etc/apache2/conf.d/: No such file or directory
So, I created the directory, and then I get this:
* Starting web server apache2 * * The apache2 configtest failed. Output of config test was: [Wed Oct 30 11:17:42.921934 2013] [proxy_html:notice] [pid 2496] AH01425: I18n support in mod_proxy_html requires mod_xml2enc. Without it, non-ASCII characters in proxied pages are likely to display incorrectly. AH00526: Syntax error on line 84 of /etc/apache2/apache2.conf: Invalid command 'LockFile', perhaps misspelled or defined by a module not included in the server configuration Action 'configtest' failed. The Apache error log may have more information.