Installation of Moodle on Ubuntu 14.04

Install Apache/MySQL/PHP

sudo apt-get update
sudo apt-get install apache2 mysql-client mysql-server php5

sudo apt-get install graphviz aspell php5-pspell php5-curl php5-gd php5-intl php5-mysql php5-xmlrpc php5-ldap

sudo apt-get install git-core

Restart Apache

sudo service apache2 restart

Download Moodle
cd /opt
sudo git clone git://git.moodle.org/moodle.git
cd moodle
sudo git branch -a
sudo git branch --track MOODLE_27_STABLE origin/MOODLE_27_STABLE
sudo git checkout MOODLE_27_STABLE

Copy local repository to /var/www/html/
sudo cp -R /opt/moodle /var/www/html/
sudo mkdir /var/www/moodledata
sudo chown -R www-data /var/www/moodledata
sudo chmod -R 777 /var/www/moodledata
sudo chmod -R 0755 /var/www/html/moodle

Setup MySQL Server
sudo gedit /etc/mysql/my.cnf

Add following lines under Basic settings section.

default-storage-engine = innodb

Save and close the file.

Restart MySQL
sudo service mysql restart

Create the Moodle MySQL User

mysql -u root -p

mysql>

CREATE DATABASE moodle DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci;

mysql>

GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,CREATE TEMPORARY TABLES,DROP,INDEX,ALTER ON moodle.* TO moodle@localhost IDENTIFIED BY 'moodle';

mysql>

quit;
Complete Setup
sudo chmod -R 777 /var/www/html/moodle
Open your browser and go to http://127.0.1.1/moodle
After you have ran the installer and you have moodle setup, you NEED to revert permissions so that it is no longer writable using the below command.

sudo chmod -R 0755 /var/www/html/moodle

Reference: Moodle Documentation