Set up Jruby with apache and passenger in EC2
 How to set up jruby with apache and passenger in amazone ec2.   Step 1: First install jruby using please check the current version in the   link . And make sure you are installing the bin version of it   wget 'http://jruby.org.s3.amazonaws.com/downloads/1.7.4/jruby-bin-1.7.4.tar.gz'   Step 2: extract the tar file using  tar zxvf jruby-bin-1.7.4.tar.gz   Step 3:  We need to set come environment variable so that it will be accessible from every other place.  export JRUBY_HOME=/home/home_directory_name/jruby-1.7.4  export PATH=$JRUBY_HOME/bin:$PATH   And Open the .bashrc file and put the path in their   sudo nano ~/.bashrc  PATH=$PATH:/home/ubuntu/jruby-1.7.4/bin    Step 4:  Now to check if jruby is properly installed or not put  jruby-v   If your system does not have java installed then it will show an error like  /home/ubuntu/jruby-1.7.4/bin/jruby: line 395: exec: java: not found  Don't worry we will install java to fix this.   sudo apt-get install openjdk-7-jdk  apt-cache ...