How to Install RVM, Ruby and Rails

For my reference:
http://yakiloo.com/using-rvm/
http://ryanbigg.com/2010/12/ubuntu-ruby-rvm-rails-and-you/
http://rvm.io/rvm/best-practices

For this installation I followed what’s called single user installation, which is the recommended way of installation, this is an isolated install within a user's $HOME, not for root.

Install RVM

1. Install prerequisites

$ sudo yum install sqlite-devel nodejs openssl

2. Set rvm_path

$ echo 'rvm_path="$HOME/.rvm"' >> ~/.rvmrc

3. Install RVM as a single user ( background info: https://rvm.io/rvm/install)

$  \curl -L https://get.rvm.io | bash -s stable

4. At this point, RVM should have been installed, check if rvm was installed correctly by loading it then checking it’s type:

$ source ~/.rvm/scripts/rvm
$ type rvm | head -n 1
rvm is a function

5. Make sure that the latest version is installed

$ rvm get stable

6. Run the rvm requirements to get all the dependencies for RVM, this might prompt for your password when it needed to install missing packages:

$ rvm requirements
Checking requirements for fedora.
Installing requirements for fedora.
Updating system
Installing required packages: patch, gcc-c++, patch, readline-devel, zlib-devel, libyaml-devel, libffi-devel, openssl-devel, autoconf, automake, libtool, bisondelacs password required for '/usr/bin/env PATH=/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/usr/local/bin/Aptana_Studio_3:/auto/home3/delacs/bin:/auto/home3/delacs/.rvm/bin:/sbin yum install -y patch gcc-c++ patch readline-devel zlib-devel libyaml-devel libffi-devel openssl-devel autoconf automake libtool bison': 
....................................................................................................................................................................................................................
Requirements installation successful.

Install Ruby

7. Now let’s install Ruby:

$ rvm install 2.0.0

8. The above command should install RubyGems with it, if in case there is an issue such that RubyGems was not able to install due to some checksum error, go to one version below the latest, e.g.,

$ rvm rubygems latest

9. Let’s tell RVM to use Ruby 2.0.0 as our default

$ rvm use ruby-2.0.0-p247 --default
Using /home/samdc/.rvm/gems/ruby-2.0.0-p247

10. Let’s check the version of Ruby in our environment

$ ruby -v
ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-linux]

Install Rails

11. First, let’s set our gems environment, due to some contraints (I think it’s the corporate firewall preventing installation of certs) Add these lines to your ~/.gemrc:

:ssl_verify_mode: 0
:sources:
- http://rubygems.org/
- http://gems.github.com
gem: --no-rdoc --no-ri

The last line is to not install rdoc and ri

12. Let’s install Rails. We wan’t to make use of GemSets so we can easily manage versioning in our installs. Create a gemset:

$ rvm gemset create RailsDev
gemset created RailsDev => /auto/home3/delacs/.rvm/gems/ruby-2.0.0-p247@RailsDev

13. Let’s use that GemSet:

$ rvm gemset use RailsDev
Using ruby-2.0.0-p247 with gemset RailsDev

Let’s check if we are using that gemset

$ rvm gemset name
RailsDev

14. Now let’s install all gems that we need

$ gem install rails --version 4.0.1

15. Lets verify the installation

$ rails -v
Rails 4.0.1

16. To make use of this RVM environment, we can specify 2 files in the project’s root folder:

$ cat .ruby-gemset
RailsDev

$ cat .ruby-version
ruby-2.0.0-p247

To learn more about RVM and its environment, refer to these posts: http://yakiloo.com/using-rvm/ http://stackoverflow.com/questions/15708916/use-rvmrc-or-ruby-version-file-to-set-a-project-gemset-with-rvm

17. To make use of automatic install of rubies, you can specify a flag in ~/.rvmrc

rvm_install_on_use_flag=1

18. You also make bootstrapping a project happen via cd into the project directory, by adding this to ~/.rvmrc

export rvm_project_rvmrc=1

19. To access webrick from another system, firewall needs to be opened up for port 3000 as follows:

$ sudo firewall-cmd --permanent --zone=public --add-port=3000/tcp
$ sudo systemctl restart firewalld.service