Ruby is...
A dynamic programming language and open source, focusing on simplicity and high efficiency. It has a clear syntax, familiar and easy to write
I.Preparation :
Homepage https://www.ruby-lang.org/ Click here
Download ruby versions in this page Click here
http://cache.ruby-lang.org/pub/ruby/
Install epel repository, reference link here Click here
II.Proceeding:
Install gem
Install some packages
# yum groupinstall -y 'development tools'
# yum install -y gcc gcc-c++ make zlib-devel pcre-devel openssl-devel wget
Creat a folder storing downloaded files
# mkdir /download/
Download Ruby gem installation file into the folder download and upzip it
# cd /download/
# wget https://cache.ruby-lang.org/pub/ruby/2.3/ruby-2.3.0.tar.gz
# tar -xvf ruby-2.3.0.tar.gz
Then access the folder Ruby which has been upzipped
# cd download/ruby-2.3.0
Run these commands to install
# ./configure
# make
# make install
Test the version
# gem -v
Install rails
Update game
# gem update
During updating there will be some questions, just press 'y'
Install rails with this command
# gem install rails
Test the version
# rails -v