RoR - How to remove Rails 4.1.1 version?

Question

I am new to RoR and I tried to follow the Ruby on Rails Tutorial from Micheal Hartl. Before starting the tutorial I already set up everything earlier and updated the Rails v

Answer 1

First find the rails gem directory.

There are many ways to do it, such as looking in your GEM_HOME and GEM_PATH

echo $GEM_HOME
echo $GEM_PATH

Here's a brute-force way:

find / -type d -name rails-4.1.1 

This may find multiple directories, such as the system's gem directory, cache, docs, bundler directory, ruby versioning directories for RVM or chruby, etc.

If you're the only user of the system, then remove all of these.

Immediately verify that 4.1.1 is gone:

# Show the executable, if any
which rails  

# Show the version, which should not say 4.1.1
rails --version

# If you're within a bundle directory
bundle exec rails --version

Do NOT bundle yet.

Edit your Gemfile, which may also be asking for Rails 4.1.1, and set the exact Rails version that you want:

gem 'rails', '= 4.0.5'

Now bundle:

bundle update

Verify that rails 4.1.1 is not in your Gemfile nor lock:

grep 4.1.1 Gemfile Gemfile.lock