How to Update Ruby on Rails on Linux#

Check Installed Ruby Gems Package Manager Version#

gem -v

Update RubyGems#

gem update --system

List outdated gems#

gem outdated

Update stale gems#

gem update

Update Rails Project Basis#

Rails updates on a project basis should specify the version in the GemFile:

source 'https://rubygems.org' gem 'rails', '4.1.9'

bundle update rails

Rails Update global#

gem install rails --no-ri --no-rdoc

Check rails version#

rails -v

Source: http://railsapps.github.io/ stackoverflow