Cannot start Rails Server, "no such file to load -- bundler/setup"

var/www/amidev/config/boot.rb:6:in `require': no such file to load -- bundler/setup (LoadError)
    from /var/www/amidev/config/boot.rb:6:in `<top (required)>'
    from script/rails:5:in `requir开发者_开发技巧e'
    from script/rails:5:in `<main>'

I have got the following error and cannot find solution to fix it ?

Please advise.

You need to install the bundler gem.

To do that, just run gem install bundler and try again.

Make sure you are executing whatever command you are executing here with "bundle exec".

For instance:

bundle exec rake -T

instead of:

rake -T

Source: http://gembundler.com/