Ubuntu 14.04.
So everything was working fine and I had my terminal open with two tabs - one tab had webbrick running on my sebcoles project, and the other tab I used to clone my english_teacher repo. It all downloaded fine and I changed into the directory.
I'll just paste everything here - it's all pretty clear:
andrew:projects$ cd pinteresting
RVM used your Gemfile for selecting Ruby, it is all fine - Heroku does that too,
you can ignore these warnings with 'rvm rvmrc warning ignore /home/andrew/projects/pinteresting/Gemfile'.
To ignore the warning for all files run 'rvm rvmrc warning ignore allGemfiles'.
ruby-2.1.5 is not installed.
To install do: 'rvm install ruby-2.1.5'
andrew:pinteresting$ rvm install ruby-2.1.5
Warning, new version of rvm available '1.26.11', you are using older version '1.26.10'.
You can disable this warning with: echo rvm_autoupdate_flag=0 >> ~/.rvmrc
You can enable auto-update with: echo rvm_autoupdate_flag=2 >> ~/.rvmrc
Searching for binary rubies, this might take some time.
Found remote file https://rvm_io.global.ssl.fastly.net/binaries/ubuntu/14.04/x86_64/ruby-2.1.5.tar.bz2
Checking requirements for ubuntu.
Requirements installation successful.
ruby-2.1.5 - #configure
ruby-2.1.5 - #download
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 23.1M 100 23.1M 0 0 1189k 0 0:00:19 0:00:19 --:--:-- 1381k
No checksum for downloaded archive, recording checksum in user configuration.
ruby-2.1.5 - #validate archive
ruby-2.1.5 - #extract
ruby-2.1.5 - #validate binary
ruby-2.1.5 - #setup
ruby-2.1.5 - #gemset created /home/andrew/.rvm/gems/ruby-2.1.5@global
ruby-2.1.5 - #importing gemset /home/andrew/.rvm/gemsets/global.gems....................................
ruby-2.1.5 - #generating global wrappers........
ruby-2.1.5 - #gemset created /home/andrew/.rvm/gems/ruby-2.1.5
ruby-2.1.5 - #importing gemsetfile /home/andrew/.rvm/gemsets/default.gems evaluated to empty gem list
ruby-2.1.5 - #generating default wrappers........
andrew:pinteresting$ heroku status
=== Heroku Status
Development: No known issues at this time.
Production: No known issues at this time.
andrew:pinteresting$ rails s
/home/andrew/.rvm/rubies/ruby-2.1.5/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- rails/cli (LoadError)
from /home/andrew/.rvm/rubies/ruby-2.1.5/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /usr/bin/rails:7:in `<main>'
andrew:pinteresting$ rails -v
/home/andrew/.rvm/rubies/ruby-2.1.5/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- rails/cli (LoadError)
from /home/andrew/.rvm/rubies/ruby-2.1.5/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /usr/bin/rails:7:in `<main>'
So, basically I'm screwed at the moment - I can't do anything. Help!
You have installed rvm but forget to install rails gem. Install it use:
gem install rails
Turns out I just had to run bundle install and everything was fine. However, for my pinteresting repo, which uses the paperclip gem, I had to run sudo apt-get install imagemagick in order to upload images in development.
Haven't dared commit anything new and push and deploy to heroku yet though. I think it should be fine though (touch wood).
I too had the same error. I forgot to switch to correct ruby version and correct gemset using rvm. That's it, I was able to sort this issue.
$rvm list
$rvm use ruby version
$rvm gemset use gemset-name
来源：https://stackoverflow.com/questions/30083446/rails-v-cannot-load-such-file-rails-cli-loaderror