a2enmod rewrite expires deflate headers
service apache2 restart

Comme nous avons installé Apache en mode MPM-ITK, nous allons créé un utilisateur système spécialement pour notre site, et c'est cet utilisateur qui sera utilisé par Apache.

adduser rbschange
Adding user `rbschange' ...
Adding new group `rbschange' (1001) ...
Adding new user `rbschange' (1001) with group `rbschange' ...
Creating home directory `/home/rbschange' ...
Copying files from `/etc/skel' ...
Enter new UNIX password: 
Retype new UNIX password: 
passwd: password updated successfully
Changing the user information for rbschange
Enter the new value, or press ENTER for the default
	Full Name []: Demo RBSChange vhost
	Room Number []: 
	Work Phone []: 
	Home Phone []: 
	Other []: 
Is the information correct? [Y/n] Y

Créer le dossier de stockage des sessions :

mkdir /home/rbschange/sessions
chown -R rbschange:rbschange /home/rbschange/sessions

<VirtualHost _default_:80>
    ServerName rbschange.local.fr

    # User and group used by Apache (Only with mpm-itk)
    AssignUserID rbschange rbschange

    ServerAdmin admin@rbschange.local.fr
    ## Uncomment line below for Debian, Ubuntu...
    #CustomLog /var/log/apache2/rbschange.local.fr.log combined
    #ErrorLog /var/log/apache2/rbschange.local.fr.log.error.log
    ## Uncomment line below for RHEL, CentOS....
    #CustomLog /var/log/httpd/rbschange.local.fr_log combined
    #ErrorLog /var/log/httpd/rbschange.local.fr._error_log
    
    # specific types for Change backoffice
    AddType application/x-xpinstall .xpi
    AddType application/vnd.mozilla.xul+xml .xul
    AddType text/xml .rdf .xbl

    # Expires header
    <IfModule expires>
        ExpiresActive On
        ExpiresByType image/gif A7200
        ExpiresByType image/png A7200
        ExpiresByType image/jpeg A7200
        ExpiresByType text/css A7200
        ExpiresByType text/javasript A7200
        ExpiresByType application/x-javascript A7200
        ExpiresByType application/x-shockwave-flash A7200
    </IfModule>
    
    # Text data compression
    <IfModule deflate>
        AddOutputFilterByType DEFLATE text/html text/css text/plain text/xml application/x-javascript application/json
        DeflateCompressionLevel 1
        BrowserMatch ^Mozilla/4 gzip-only-text/html
        BrowserMatch ^Mozilla/4.0[678] no-gzip
        BrowserMatch bMSIE !no-gzip !gzip-only-text/html
    </IfModule>
    
    # PHP configuration
    php_flag short_open_tag off
    php_flag magic_quotes_gpc off
    php_value memory_limit 192M
    php_value post_max_size 60M
    php_value upload_max_filesize 60M
    php_value default_charset utf-8
    php_value session.cache_limiter " "
    # You may want to change your sessions path
    php_value session.save_path /home/rbschange/sessions
    
    # Don't forget to modify DocumentRoot value here
    DocumentRoot /home/rbschange/www
    <Directory /home/rbschange/www>
        Options Indexes FollowSymLinks
        AllowOverride All
        Order allow,deny
        allow from all
    </Directory>
</VirtualHost>