Step 1: Upgrade Packages
# yum update
Step 2: Installing Recommended Packages
# yum install gcc-c++ patch readline readline-devel zlib zlib-devel
# yum install libyaml-devel libffi-devel openssl-devel make
# yum install bzip2 autoconf automake libtool bison iconv-devel
Step 3: Install RVM ( Ruby Version Manager )
# curl -L get.rvm.io | bash -s stable
Step 4: Setup RVM Environment
# source /etc/profile.d/rvm.sh
Step 5: Install Required Ruby Version
# rvm install 1.9.3
Step 6: Setup Default Ruby Version
# rvm use 1.9.3 --default
Step 7: Check Current Ruby Version
# ruby --version