NGINX
 If you're using one of the official upstream packages of nginx from http://nginx.org/packages/, the best way is to navigate to the /etc/nginx/conf.d directory, and rename the affected file from having a .conf suffix to having a different one to disable the site:
 sudo mv -i /etc/nginx/conf.d/default.conf{,.off}
 Or the opposite to enable it:
 sudo mv -i /etc/nginx/conf.d/example.com.conf{.disabled,}
 This is because the default /etc/nginx/nginx.conf has the following include directive:
 http { … include /etc/nginx/conf.d/*.conf; } 
 
 Debian/Ubuntu
 However, if you're using a Debian/Ubuntu derivative, then in addition to conf.d, you may also have the evil non-standard sites-available and sites-enabled directories, some files under which may be sloppily included without regard to their extension:
 http { … include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*; } 
 As such, in Debian/Ubuntu, you might first have to figure out where the site config is located.
  - You could use the following command to get a list of all available sites by running - find(1)to find all regular files matching the given mask:
 - find /etc/nginx -maxdepth 2 -type f \( -path "*/conf.d/*.conf" -or -path "*/sites-*/*" \)
 
- You could use the following command to get a list of all enabled sites: - find /etc/nginx -maxdepth 2 \( -path "*/conf.d/*.conf" -or -path "*/sites-enabled/*" \)
 
Then to disable/enable sites on Debian/Ubuntu:
  - To disable a site: if the config is in - conf.d, just rename the file to no longer have a- .confsuffix; or if in- sites-enabled, move it out of- sites-enabled.
 
- To enable a site, the best way would be to move it to - /etc/nginx/conf.d, and rename to have a- .confsuffix.
 
P.S. Why do I think Debian's include /etc/nginx/sites-enabled/*; is evil? Try editing a couple of files in that directory, and have your emacs create the backup files (with the ~ suffix), then ask me again.