A script (or just list of commands) to setup a jenkins server on Ubuntu 12.04 hosted at linode. Liberally borrowed from https://gist.github.com/whistler/3179919#file-jenkins_rails_ubuntu-sh

ci_install.sh

sudo aptitude -y install build-essential libssl-dev libreadline5 libreadline5-dev zlib1g zlib1g-dev
sudo apt-get -y install libxslt-dev libxml2-dev
sudo apt-get -y install libmysqlclient-dev ruby-dev
sudo apt-get -y install libcurl4-openssl-dev
sudo apt-get -y install imagemagick libmagickcore-dev libmagickwand-dev
sudo apt-get -y install libsqlite3-dev
sudo apt-get -y install libreadline-dev
sudo apt-get -y install git
sudo apt-get -y install libicu48
sudo apt-get -y install nodejs
sudo apt-get -y install redis-server
sudo apt-get -y install zsh
sudo apt-get -y install ack

### Install Phantomjs

sudo apt-get -y install phantomjs

### Install Java ###

sudo apt-get -y install openjdk-6-jre-headless

### Install Jenkins ###

wget -q -O - http://pkg.jenkins-ci.org/debian/jenkins-ci.org.key | sudo apt-key add -
sudo sh -c 'echo deb http://pkg.jenkins-ci.org/debian binary/ > /etc/apt/sources.list.d/jenkins.list'
sudo aptitude -y update
sudo aptitude -y install jenkins
sudo /etc/init.d/jenkins start

### Log in as Jenkins ###

sudo adduser jenkins
sudo passwd jenkins
sudo -Hiu jenkins

### Configure Apache ###

sudo aptitude -y install apache2
sudo a2enmod proxy
sudo a2enmod proxy_http
sudo a2enmod vhost_alias

sudo a2dissite default

sudo touch /etc/apache2/sites-available/jenkins

sudo echo "<VirtualHost *:80>
  ServerAdmin webmaster@localhost
  ServerName *
  ServerAlias ci
  ProxyRequests Off
  <Proxy *>
    Order deny,allow
    Allow from all
  </Proxy>
  ProxyPreserveHost on
  ProxyPass / http://localhost:8080/
</VirtualHost>" > /etc/apache2/sites-available/jenkins

sudo a2ensite jenkins
sudo apache2ctl restart

### Install MySQL ###

sudo apt-get -y install mysql-server

### Install Postgresql
sudo apt-get -y install postgresql postgresql-contrib
sudo apt-get -y install libpq-dev

### Configure Githhub ###
ssh-keygen
# copy over key to Github
git config --global user.name "ryane"
git config --global user.email "ryanesc@gmail.com"
ssh -T git@github.com


### Install rbenv ###

git clone git://github.com/sstephenson/rbenv.git ~/.rbenv
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> .bash_profile
echo 'eval "$(rbenv init -)"' >> .bash_profile
source ~/.bash_profile

############ Install ruby-build ############

pushd /tmp
  git clone git://github.com/sstephenson/ruby-build.git
  cd ruby-build
  sudo ./install.sh
popd


### Install Ruby ###
CONFIGURE_OPTS="--with-readline-dir=/usr/include/readline"
rbenv install 1.9.3-p194
rbenv global 1.9.3-p194
rbenv local 1.9.3-p194

gem install bundler

### Install Heroku Toolbelt
wget -qO- https://toolbelt.heroku.com/install-ubuntu.sh | sh