Ruby インストール on CentOS7

$ sudo yum -y install git libffi libffi-dev gcc openssl-devel readline-devel zlib-devel

$ git clone https://github.com/sstephenson/rbenv.git ~/.rbenv
$ git clone https://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build

$ echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
$ echo 'eval "$(rbenv init -)"' >> ~/.bash_profile
$ exec $SHELL
$ source ~/.bash_profile

$ rbenv install -list

Available versions:
   :
   :
  2.0.0-p643
  2.0.0-p645 ← 2.0.0の最新 (※2015/08/06時点)
  2.1.0-dev
  2.1.0-preview1
  2.1.0-preview2
  2.1.0-rc1
   :

$ rbenv install -v 2.0.0-p645

$ rbenv rehash

$ rbenv global 2.0.0-p645

$ ruby -v
ruby 2.0.0p645 (2015-04-13 revision 50299) [x86_64-linux]