How to install Redmine 2.4.2 on Ubuntu 14.04

-------Install Prerequisites-------
sudo su
apt-get update && apt-get -y upgrade
apt-get -y install apache2 libapache2-mod-passenger mysql-server mysql-client
apt-get -y install redmine redmine-mysql

-------Edit passenger.conf-------
nano /etc/apache2/mods-available/passenger.conf

PassengerDefaultUser www-data
PassengerRoot /usr/lib/ruby/vendor_ruby/phusion_passenger/locations.ini
PassengerDefaultRuby /usr/bin/ruby

ln -s /usr/share/redmine/public /var/www/redmine
gem install bundler

-------Edit 000-default.conf-------
nano /etc/apache2/sites-available/000-default.conf

        ServerName localhost
        DocumentRoot /var/www/redmine
        ServerAdmin admin@localhost
        PassengerMinInstances 6
        PassengerMaxPoolSize 20
        RailsSpawnMethod smart
        PassengerPoolIdleTime 1000
        RailsAppSpawnerIdleTime 3600
        PassengerPoolIdleTime 1000
        RailsAppSpawnerIdleTime 3600
        PassengerMaxPreloaderIdleTime 0
        PassengerMaxRequests 5000
        PassengerStatThrottleRate 5
        LogLevel warn
        ErrorLog /var/log/apache2/redmine_error
        CustomLog /var/log/apache2/redmine_access combined
        Options Indexes FollowSymLinks MultiViews
        RailsBaseURI /redmine
        PassengerResolveSymlinksInDocumentRoot on

chown -R www-data:www-data /usr/share/redmine/
service apache2 restart