I do not fully understand gemfile in rails application

Question

What is the difference between installing gem from the command line

sudo gem install gem-name

and writing your gem in the gemfile and running bundle install?

I think the problem is that I do not understand the exact purpose of the Gemfile. It still seems that this is a place where you can list all the jewels on which your application depends.

Answer 1

Setting the gemstone through:

sudo gem install gem-name

going to install this gem system wide.

While installing them through the Gemfile is specific to your rails application (track dependencies, version, application portability, etc.).

Answer 2

Whats Whys Bundler, , :

http://gembundler.com/rationale.html

, Bundler .

Answer 3

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http://blog.despo.me/42762318