Ruby Concepts
RVM
Ruby version management tools
RubyGems
Ruby package management tools (manual like RPM)
gem install rails / bundler
gem update
Bundler
package management tools of project by Gemfile file (like maven)
bundle install # will install all the package need by this project
Rails
Web framework for Ruby
rake db:migrate
rake db:create
other backup
Written by Yilong Yang
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