<VirtualHost *:80>
  # The ServerName directive sets the request scheme, hostname and port that
  # the server uses to identify itself. This is used when creating
  # redirection URLs. In the context of virtual hosts, the ServerName
  # specifies what hostname must appear in the request’s Host: header to
  # match this virtual host. For the default virtual host (this file) this
  # value is not decisive as it is used as a last resort host regardless.
  # However, you must set it for any further virtual host explicitly.
  #ServerName www.example.com

  ServerAdmin webmaster@localhost
  DocumentRoot /var/www/html

  # Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
  # error, crit, alert, emerg.
  # It is also possible to configure the loglevel for particular
  # modules, e.g.
  #LogLevel info ssl:warn

  ErrorLog ${APACHE_LOG_DIR}/error.log
  CustomLog ${APACHE_LOG_DIR}/access.log combined

  # For most configuration files from conf-available/, which are
  # enabled or disabled at a global level, it is possible to
  # include a line for only one particular virtual host. For example the
  # following line enables the CGI configuration for this host only
  # after it has been globally disabled with "a2disconf".
  #Include conf-available/serve-cgi-bin.conf
</VirtualHost>

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet

// プロキシモジュールの有効化
$ a2enmod proxy proxy_http
Enabling module proxy.
Considering dependency proxy for proxy_http:
Module proxy already enabled
Enabling module proxy_http.
To activate the new configuration, you need to run:
  service apache2 restart

// Apacheを再起動
$ /etc/init.d/apache2 restart

<IfModule mod_proxy.c>

  # If you want to use apache2 as a forward proxy, uncomment the
  # 'ProxyRequests On' line and the <Proxy *> block below.
  # WARNING: Be careful to restrict access inside the <Proxy *> block.
  # Open proxy servers are dangerous both to your network and to the
  # Internet at large.
  #
  # If you only want to use apache2 as a reverse proxy/gateway in
  # front of some web application server, you DON’T need
  ProxyRequests Off

  <Proxy *>
  #   AddDefaultCharset off
  #   Require all denied
  #   #Require local
    Require all granted
  </Proxy>
  ProxyPass /hoge/ http://localhost:80/hoge.html
  ProxyPassReverse /hoge/ http://localhost:80/hoge.html

  # Enable/disable the handling of HTTP/1.1 "Via:" headers.
  # ("Full" adds the server version; "Block" removes all outgoing Via: headers)
  # Set to one of: Off | On | Full | Block
  #ProxyVia Off
</IfModule>

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet

$ a2enmod rewrite
Enabling module rewrite.
To activate the new configuration, you need to run:
  service apache2 restart

// Apacheを再起動
$ /etc/init.d/apache2 restart

// /etc/apache2/apache2.conf
<Directory /var/www/>
  Options Indexes FollowSymLinks
  AllowOverride All
  Require all granted
</Directory>

// /etc/apache2/apache2.conf
# AccessFileName: The name of the file to look for in each directory
# for additional configuration directives.  See also the AllowOverride
# directive.
#
AccessFileName .htaccess

// /var/www/html/.htaccess
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule ^fuga/(.*)$ /bar/$1
</IfModule>

// /etc/apache2/site-enabled/000-default.conf
<VirtualHost *:80>
  ...
  ErrorLog ${APACHE_LOG_DIR}/error.log
  CustomLog ${APACHE_LOG_DIR}/access.log combined

  // 以下、ErrorDocumentの設定
  ErrorDocument 404 error_404.html
  ErrorDocument 500 error_500.html
  ...
</VirtualHost>