install ruby on rails on rhel 6

Due to my laptop refreshment ,I have to rebuild ruby on rails environment for my github blog.It take a couple of hours to fix Jekyll and ruby on rails issue.

1. jekyll 3.0.1 need ruby > =ruby 2.0.0
2. When I run gem command after upgrading Ruby, I get the following error.

$wget https://rubygems.global.ssl.fastly.net/rubygems/rubygems-2.5.0.tgz
$tar -zxvf rubygems-2.5.0.tgz 
$cd rubygems-2.5.0
$sudo ruby setup.rb
$sudo gem install rubygems-update
ERROR:  While executing gem ... (Gem::Exception)
Unable to require openssl, install OpenSSL and rebuild ruby (preferred) or use non-HTTPS sources
</code>
3. To fix the problem, you need to build and install Ruby extension for OpenSSL from the source as follows.

$ sudo yum install openssl-devel
$wget https://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.7.tar.gz
$tar -zxvf ruby-2.1.7.tar.gz
$cd  ruby-2.1.7/ext/openssl/ 
$ ruby extconf.rb
$ make topsrcdir="../../"
$ sudo make install topsrcdir="../../"
</code>
4. Because Jekyll 3 uses Kramdown by default,The following lines from my _config.yml file: will be added 

kramdown:
input: GFM
syntax_highlighter: rouge
</code>
5. change one line in layout/post.html

from {{ page.date | dateto_string }} to {{ page.date | date:"%Y-%m" }}
</code>
6. Installing Recommended Packages for ruby and gem.

sudo  yum install gcc-c++ patch readline readline-devel zlib zlib-devel 
sudo  yum install libyaml-devel libffi-devel openssl-devel make 
sudo  yum install bzip2 autoconf automake libtool bison iconv-devel




			
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