Ruby on rails bundle install - json error - ruby-on-rails

Question

I have a lot of difficulties to run Ruby on Rails. Maybe you can tell me where I'm wrong ?
I'm on Linux Mint 17.2, with LAMP local server.
To install Ruby :
$ sudo apt-get install ruby
$ ruby -v
ruby 1.9.3p484
$
I didn't have to install gem, it works as shown here :
$ gem help commands
GEM commands are:
build Build a gem from a gemspec
cert Manage RubyGems certificates and signing settings
(...)
update Update the named gems (or all installed gems) in the local
repository
which Find the location of a library file you can require
For help on a particular command, use 'gem help COMMAND'.
Commands may be abbreviated, so long as they are unambiguous.
e.g. 'gem i rake' is short for 'gem install rake'.
Then I installed rails, I dont remember which of those two ways :
$ sudo gem install rails
or
$ sudo apt-get install ruby-railties-4.0
I dont find how to uninstall, so I can't test other ways to install.
Then, I made an application :
$ rails new (path)/second_app
create
create README.rdoc
create Rakefile
create config.ru
create .gitignore
create Gemfile
create app
create app/assets/javascripts/application.js
(...)
create vendor/assets/javascripts
create vendor/assets/javascripts/.keep
create vendor/assets/stylesheets
create vendor/assets/stylesheets/.keep
run bundle install
/usr/lib/ruby/1.9.1/rubygems.rb:308:in `bin_path': can't find gem bundler (>= 0) (Gem::GemNotFoundException)
from /var/lib/gems/1.9.1/gems/railties-4.0.2/lib/rails/generators/app_base.rb:268:in `bundle_command'
from /var/lib/gems/1.9.1/gems/railties-4.0.2/lib/rails/generators/app_base.rb:277:in `run_bundle'
from (eval):1:in `run_bundle'
from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor/command.rb:27:in `run'
from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor/invocation.rb:126:in `invoke_command'
from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `block in invoke_all'
from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `each'
from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `map'
from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `invoke_all'
from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor/group.rb:232:in `dispatch'
from /var/lib/gems/1.9.1/gems/thor-0.19.1/lib/thor/base.rb:440:in `start'
from /var/lib/gems/1.9.1/gems/railties-4.0.2/lib/rails/commands/application.rb:43:in `<top (required)>'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /var/lib/gems/1.9.1/gems/railties-4.0.2/lib/rails/cli.rb:15:in `<top (required)>'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /var/lib/gems/1.9.1/gems/railties-4.0.2/bin/rails:9:in `<top (required)>'
from /usr/local/bin/rails:23:in `load'
from /usr/local/bin/rails:23:in `<main>'
It looks like it was a problem running bundle install. According to tutorials, I run the command
$ bundle install
And I got
Fetching gem metadata from https://rubygems.org/............
Fetching gem metadata from https://rubygems.org/..
Resolving dependencies...
Using rake (10.4.2)
Using i18n (0.7.0)
Using minitest (4.7.5)
…
Using jbuilder (1.5.3)
Using jquery-rails (3.1.3)
Installing json (1.8.3)
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/usr/bin/ruby1.9.1 extconf.rb
/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError)
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from extconf.rb:1:in `<main>'
Gem files will remain installed in /home/alejandro/.bundler/tmp/9377/gems/json-1.8.3 for inspection.
Results logged to /home/alejandro/.bundler/tmp/9377/gems/json-1.8.3/ext/json/ext/generator/gem_make.out
An error occurred while installing json (1.8.3), and Bundler cannot continue.
Make sure that `gem install json -v '1.8.3'` succeeds before bundling.
I tryed to install json in several ways :
$ sudo gem install json -v '1.8.3'
$ sudo apt-get install json -v '1.8.3'
$ sudo gem install json
But it don't work. I tryed to to run de server :
$ rails server
Could not find gem 'rails (= 4.0.2) ruby' in the gems available on this machine.
Run `bundle install` to install missing gems.
I have tryed to install rvm and rbenv, but nothing works in the way tutorials says it should. My feeling is that I missed something in the begynning, but I dont know what.
Could you please help me ?
Thanks
Alex

Answer 1

You need to update gem lock and all dependency
For that please execute below command,
gem update --system
Now You can install json gem using ,
gem install json
Try above command and let me know if you still face same thing. Above things works fine for me:D