How to Install Ruby/ROR on RHEL

Step 1 Install RVM

Install latest stable version of RVM on your system using following command. This command will automatically download all required files and install on your system.

# curl -L get.rvm.io | bash -s stable

Step 2: Setup RVM Environment

RVM provides a shell script to setup system environment before installing Ruby. Use below command to setup rvm environment.

# source /etc/profile.d/rvm.sh

Step 3: Install Ruby

After completing setup of RVM environment, lets install Ruby language using following command.

# rvm install 2.1.2

[Sample Output]

ruby-2.1.2 - #removing src/ruby-2.1.2..
Searching for binary rubies, this might take some time.
No binary rubies available for: centos/6/i386/ruby-2.1.2.
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
Checking requirements for centos.
Requirements installation successful.
Installing Ruby from source to: /usr/local/rvm/rubies/ruby-2.1.2, this may take a while depending on your cpu(s)...
ruby-2.1.2 - #downloading ruby-2.1.2, this may take a while depending on your connection...
ruby-2.1.2 - #extracting ruby-2.1.2 to /usr/local/rvm/src/ruby-2.1.2...
ruby-2.1.2 - #configuring.....................................................
ruby-2.1.2 - #post-configuration.
ruby-2.1.2 - #compiling....................................................................................
ruby-2.1.2 - #installing................................
ruby-2.1.2 - #making binaries executable..
Rubygems 2.2.2 already available in installed ruby, skipping installation, use --force to reinstall.
ruby-2.1.2 - #gemset created /usr/local/rvm/gems/ruby-2.1.2@global
ruby-2.1.2 - #importing gemset /usr/local/rvm/gemsets/global.gems.............................................................
ruby-2.1.2 - #generating global wrappers.........
ruby-2.1.2 - #gemset created /usr/local/rvm/gems/ruby-2.1.2
ruby-2.1.2 - #importing gemsetfile /usr/local/rvm/gemsets/default.gems evaluated to empty gem list
ruby-2.1.2 - #generating default wrappers.........
ruby-2.1.2 - #adjusting #shebangs for (gem irb erb ri rdoc testrb rake).
Install of ruby-2.1.2 - #complete
Ruby was built without documentation, to build it run: rvm docs generate-ri

Step 4: Setup Default Ruby Version

Use rvm command to setup default ruby version to be used by applications.

# rvm use 2.1.2 --default

Using /usr/local/rvm/gems/ruby-2.1.2

Step 5: Check Current Ruby Version.

Using following command you can check the current ruby version is used.

# ruby --version

ruby 2.1.2p95 (2014-05-08 revision 45877) [i686-linux]

Step 6: Install Rails.

Using following command you can check the current ruby version is used.

# gems install rails