Installing Rails: "File Not Found: Lib"

file 'lib' not found when installing rails

try this :

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

and if you want to install RDoc use :

sudo gem install rdoc-data
sudo rdoc-data --install
sudo gem rdoc --all --overwrite

if that doesnt work try this :

sudo apt-get install ruby-dev build-essential

rails 3 install error File not found: lib

As in the answer by balupton:

Ruby on Rails Beta 3 Install Problem on Snow Leopard

gem install rdoc

Follow instructions and then rerun

gem install rails

No errors occur to me now.

Installing Rails: File not found: lib On Windows 7

The best tool to use for rails in windows is rails installer for windows and it comes with the latest version of rails. I just hope this helps you solve your problems

Rails not finding files on lib folder

On rails < 5:

config/application.rb

module your_app
  class Application < Rails::Application
    # Settings in config/environments/* take precedence over those specified here.
    # Application configuration should go into files in config/initializers
    # -- all .rb files in that directory are automatically loaded.
    config.autoload_paths += %W(#{config.root}/lib/path)
  end
end

on rails >= 5

module your_app
  class Application < Rails::Application
    config.eager_load_paths << "#{Rails.root}/lib/path"
  end
end

If you want rails to auto load your lib you have to place it under the app folder.

File not found: lib when switching to older rails version using RVM

I think you went off the rails (ha-ha) right here:

sudo gem install rails --version=3.0.1

The RVM documentation has this to say about that:

DO NOT use sudo...

to work with RVM gems. When you do
sudo you are running commands as root,
another user in another shell and
hence all of the setup that RVM has
done for you is ignored while the
command runs under sudo (such things
as GEM_HOME, etc...). So to reiterate,
as soon as you 'sudo' you are running
as the root system user which will
clear out your environment as well as
any files it creates are not able to
be modified by your user and will
result in strange things happening.
(You will start to think that someone
has a voodoo doll of your
application...)

problem in installing rails

I had the same problem. I continued with the error. I do not see anything breaking. And I can code peacefully. So, probably you do not need to worry.

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sudo apt-get install build-essential libopenssl-ruby libfcgi-dev
sudo apt-get install ruby irb rubygems ruby1.8-dev
sudo apt-get install sqlite3 libsqlite3-dev
sudo gem install rails
sudo gem install sqlite3-ruby

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If you dont find path do this: (for Unix based systems)

Quoted from the book, but anyone else would suggest the same

If you can’t find the rails command, you may need to add 
/var/lib/gems/1.8/bin to your PATH environment variable.
 You can do this by adding a line to your .bashrc file:

export PATH=/var/lib/gems/1.8/bin:$PATH

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OK as aditya sanghi has mentioned, I do lack rdoc gem-- so probably running this will help

gem install rdoc rails

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