You need to run these commands
$ sudo apt-get install python-software-properties
$ sudo add-apt-repository ppa:ondrej/php5-oldstable
$ sudo apt-get update
$ sudo apt-get install -y php5 php5-mcrypt
$ sudo apt-get install apache2 libapache2-mod-php5
$ sudo apt-get install mysql-server php5-mysql
$ curl -sS https://getcomposer.org/installer | php
$ sudo mv composer.phar /usr/local/bin/composer
$ sudo chmod +x /usr/local/bin/composer
$ cd /var/www
$ git clone https://github.com/laravel/laravel.git
$ cd /var/www/laravel
$ sudo composer install
$ sudo chown -R www-data.www-data /var/www/laravel
$ sudo chmod -R 755 /var/www/laravel
$ sudo chmod -R 777 /var/www/laravel/app/storage
$ sudo vim /etc/apache2/sites-available/laravel.example.conf
Paste this code in laravel.example.conf
<VirtualHost *:80>
ServerName laravel.example.com
DocumentRoot /var/www/laravel/public
<Directory />
Options FollowSymLinks
AllowOverride None
</Directory>
<Directory /var/www/laravel>
AllowOverride All
</Directory>
ErrorLog ${APACHE_LOG_DIR}/error.log
LogLevel warn
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>
$ a2ensite laravel.example.conf
$ sudo service apache2 reload