Created Installation (markdown)

Installation.md

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+These instructions assume that you already have a working Linux-Apache-MySQL-PHP (LAMP) stack. They include examples for Debian 7 and CentOS 7 platforms.
+
+### Download CodeIgniter
+
+If wget is not already installed on your platform, then install it now.
+
+On Debian 7:
+
+`sudo apt-get install wget`
+
+On CentOS 7:
+
+`sudo yum install wget`
+
+Change to the directory where you are going to save your downloads, and download the CodeIgniter archive:
+
+`cd ~`
+
+`wget https://github.com/bcit-ci/CodeIgniter/archive/2.2-stable.zip`
+
+If unzip is not already installed, then install it now (with `sudo apt-get install unzip` or `sudo yum install unzip`, as appropriate).
+
+Unzip the compressed archive:
+
+`unzip 2.2-stable.zip`
+
+This will create a directory with a name such as CodeIgniter-2.2-stable.
+
+###Configure CodeIgniter general settings
+
+Open the `CodeIgniter-2.2-stable/application/config/config.php` file with a text editor, and set the base URL of your website. For example:
+
+`$config['base_url'] = 'http://www.example.com/';`
+
+If you intend to use encryption or sessions, then set the encryption key to a random, 32-character. For example:
+
+`$config['encryption_key'] = 'UEmQQkxr9o6qJ054rWh3feD2admpiK6O';`
+
+Save the `CodeIgniter-2.2-stable/application/config/config.php` file with the above changes.
+
+###Configure CodeIgniter database settings
+
+If you intend to use a database, edit the database settings in the `CodeIgniter-2.2-stable/application/config/database.php file`. For example:
+
+`'hostname' => 'localhost',`
+
+`'username' => 'exampleuser',`
+
+`'password' => '6SPLwbEuQTK9v36H',`
+
+`'database' => 'exampledb',`
+
+`'dbdriver' => 'mysqli',`
+
+###Secure CodeIgniter
+
+For the best security, both the system and application folders should be placed above the web root, so that they are not directly accessible via a browser.
+
+Open the `CodeIgniter-2.2-stable/index.php` file and set the `$system_folder` and `$application_folder` variables.
+
+For example, if you are using the default web root on Debian 7:
+
+`$system_path = '/var/system';`
+
+`$application_folder = '/var/application';`
+
+If you are using the default web root on CentOS 7:
+
+`$system_path = '/var/www/system';`
+
+`$application_folder = '/var/www/application';`
+
+###Copy CodeIgniter to your web server
+
+Copy the CodeIgniter materials to your web server.
+
+On Debian 7, if you are using the default web directory of `/var/www`, then execute the commands:
+
+`sudo cp -f CodeIgniter-2.2-stable/index.php /var/www/`
+
+`sudo rm /var/www/index.html`
+
+`sudo cp -rf CodeIgniter-2.2-stable/application /var/`
+
+`sudo cp -rf CodeIgniter-2.2-stable/system /var/`
+
+On CentOS 7, if you are using the default web directory of `/var/www/html`, then execute the commands:
+
+`sudo cp -f CodeIgniter-2.2-stable/index.php /var/www/html/`
+
+`sudo cp -rf CodeIgniter-2.2-stable/application /var/www/`
+
+`sudo cp -rf CodeIgniter-2.2-stable/system /var/www/`
+
+###Test the install
+
+Now open a browser and navigate to your web site. For example:
+
+`http://www.example.com/`
+
+You should see the CodeIgniter default Welcome page.