How to host multiple sites in a single Wordpress installation on Ubuntu 14.04This document describes how to install and configure WordPress MU with the latest version in market of WordPress 4 on Ubuntu 14.04. WordPress started in 2003 with a single bit of code to enhance the typography of everyday writing and with fewer users than you can count on your fingers and toes. Since then it has grown to be the largest self-hosted blogging tool in the world, used on millions of sites and seen by tens of millions of people every day. This tutorial explains the process of installing WordPress 4.0 on Ubuntu 14.04 in the form of a simple-to-follow guide.1 Preliminary NoteThis tutorial is based on Ubuntu 14.04 server, so you should set up a basic Ubuntu 14.04 server installation before you continue with this tutorial. The system should have a static IP address. I use192.168.0.100as my IP address in this tutorial andserver1.example.comas the hostname. You must have a LAMP server installed in Ubuntu 14.04 as mentioned in thetutorialto continue further.2 Database initializationI will create the database for the WordPress 4.0 as follows:mysql -u root -pHere we are addingdatabase=wordpressdb user=wordpressuserandpassword=wordpresspassword:CREATE DATABASE wordpressdb;CREATE USER wordpressuser@localhost IDENTIFIED BY 'wordpresspassword';GRANT ALL PRIVILEGES ON wordpressdb.* TO wordpressuser@localhost;Further moving ahead:FLUSH PRIVILEGES;exitRestart servicesservice apache2 restartservice mysql restart3 Installation of WordPress 4.0We will first make a directorytempin which I will the download the latest version of the WordPress as follows:mkdir tempcd tempwget http://wordpress.org/latest.zipWe need to install unzip as by default it is now installed:apt-get install unzipFurther moving ahead if you wish to work with images, install plugins and site updation with SSH credentials then we will installphp5-gd libssh2-phpapt-get updateapt-get install php5-gd libssh2-phpunzip the WordPress zip file in the following created folder:unzip -q latest.zip -d /var/www/html/Now give appropriate permissions in the directorychown -R www-data.www-data /var/www/html/wordpresschmod -R 755 /var/www/html/wordpressFurther we need to manually create the uploads directory beneath the wp-content directory at our document root. This will be the parent directory of our content:mkdir -p /var/www/html/wordpress/wp-content/uploadsWe need to allow the web server itself to write to this directory. We can do this by assigning group ownership of this directory to our web server. This will allow the web server to create files and directories under this directory, which will permit us to upload content to the server. Proceed like this:chown -R :www-data /var/www/html/wordpress/wp-content/uploadsNow we need to copy it to the default configuration file location to get WordPress to recognize the file. The sample configuration file is available at/var/www/html/wordpress:cd /var/www/html/wordpress/cp wp-config-sample.php wp-config.phpnano wp-config.php[...]

// ** MySQL settings - You can get this info from your web host ** ///** The name of the database for WordPress */define('DB_NAME', 'wordpressdb');

/** MySQL database username */define('DB_USER', 'wordpressuser');

/** MySQL database password */define('DB_PASSWORD', 'wordpresspassword');

[...] Change values as you gave at the time of database initialization.3.1 Multiple site configurationNow we will proceed with the multiple site configuration, for this we need to add these lines to ourwp-config.phpfile just above the/* Thats all, stop editing! Happy blogging. */ line.nano /var/www/html/wordpress/wp-config.php/* Multisite */define('WP_ALLOW_MULTISITE', true);/* That's all, stop editing! Happy blogging. */Now we will activate the apache Mod_Rewrite module:a2enmod rewriteNow we will change the default virtual host file for Apache as follows:nano /etc/apache2/sites-enabled/000-default.conf[...]

Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny allow from all

Restart Apache2 to make the services affective:service apache2 restartAfter that we will be installing the Wordpress 4 within browser.4 Web installationOpen a browser of your choice and go to the URLhttp://192.168.0.100/Wordpress:Select language and pressContinue:

Now give the values as I gave in my caseSite Title = Wordpress-testsiteAdmin Email = admin@example.comUsername = adminAdmin password = howtoforgeConfirm Admin Password = howtoforgeThe above values will differ in you case, you can give any values of your choice. After giving the values pressInstall WordPress:

Now we will proceed towards the login page by pressingLogIn:

Give the credentials as you selected at the time of web WordPress installation. This will be your default welcome window of WordPress.

You can check the WordPress version in browser as:

4.1 Multiple sites configurationNow gotoTools-->Network setup

Give the entries as followsNetwork Title =Wordpress-testsite multisiteNetwork admin email =admin@example.comand pressInstallIt will yield the following window:

Add the following to your wp-config.php file in /var/www/html/wordpress/ above the line reading /* Thats all, stop editing! Happy blogging. */:nano /var/www/html/wordpress/wp-config.phpGive the entries as per the your output after the multisite installation. In my case it was:[...]/* Multisite */define('WP_ALLOW_MULTISITE', true);define('MULTISITE', true);define('SUBDOMAIN_INSTALL', false);define('DOMAIN_CURRENT_SITE', '192.168.0.100');define('PATH_CURRENT_SITE', '/wordpress/');define('SITE_ID_CURRENT_SITE', 1);define('BLOG_ID_CURRENT_SITE', 1);/* That's all, stop editing! Happy blogging. */[...] Note: In my case I am using 192.168.0.100 which will be different in your caseAdd the following entries to your.htaccessfile in/var/www/html/wordpress/, replacing other WordPress rules:nano /var/www/html/wordpress/.htaccessRewriteEngine OnRewriteBase /wordpress/RewriteRule ^index\.php$ - [L]

# add a trailing slash to /wp-adminRewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]RewriteCond %{REQUEST_FILENAME} -dRewriteRule ^ - [L]RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).*) $2 [L]RewriteRule ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]RewriteRule . index.php [L]Now relogin to the WordPress. After successfully setting up the Multisite Network, you need to switch to the Network Dashboard to configure network settings, add new sites, and do lots of other things. Take your mouse over to My Sites menu in the admin toolbar, a flydown popup will appear. Click onNetwork Admin-->Dashboard.

It will direct you to the Dashboard of the WordPress multisite.

Now you can create new site by clickingSites-->Add New

Just add the values as per your requirement.

Congratulations! You now have a fully functional WordPress 4.0 instance with multiple site network on your Ubuntu 14.04 :)