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Unable to run rails server: `require': cannot load such file — net/ssh (LoadError)

 原文  2015-11-17 17:44:12  6   2    ruby-on-rails/ terminal/ server/ railstutorial.org

Question

I am trying to learn ruby on rails using the michael hartl guide. In the past, I was able to get through the setup of a new rails webapp. Now, when I try to run the server, I am getting this error: 

/home/ss/.rvm/gems/ruby-2.2.2/gems/fog-1.26.0/lib/fog/joyent/compute.rb:3:in `require': cannot load such file -- net/ssh (LoadError)
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/fog-1.26.0/lib/fog/joyent/compute.rb:3:in `<top (required)>'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/fog-1.26.0/lib/fog/joyent.rb:1:in `require'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/fog-1.26.0/lib/fog/joyent.rb:1:in `<top (required)>'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/fog-1.26.0/lib/fog.rb:41:in `require'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/fog-1.26.0/lib/fog.rb:41:in `<top (required)>'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/carrierwave-0.10.0/lib/carrierwave/storage/fog.rb:3:in `require'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/carrierwave-0.10.0/lib/carrierwave/storage/fog.rb:3:in `<top (required)>'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/carrierwave-0.10.0/lib/carrierwave/storage.rb:9:in `require'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/carrierwave-0.10.0/lib/carrierwave/storage.rb:9:in `<top (required)>'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/carrierwave-0.10.0/lib/carrierwave.rb:78:in `require'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/carrierwave-0.10.0/lib/carrierwave.rb:78:in `<top (required)>'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in `require'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in `each'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in `block in require'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in `each'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in `require'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/bundler-1.10.6/lib/bundler.rb:134:in `require'
    from /home/ss/workspace/hartl/sample_app/config/application.rb:7:in `<top (required)>'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/railties-4.2.2/lib/rails/commands/commands_tasks.rb:78:in `require'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/railties-4.2.2/lib/rails/commands/commands_tasks.rb:78:in `block in server'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/railties-4.2.2/lib/rails/commands/commands_tasks.rb:75:in `tap'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/railties-4.2.2/lib/rails/commands/commands_tasks.rb:75:in `server'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/railties-4.2.2/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/railties-4.2.2/lib/rails/commands.rb:17:in `<top (required)>'
    from /home/ss/workspace/hartl/sample_app/bin/rails:10:in `require'
    from /home/ss/workspace/hartl/sample_app/bin/rails:10:in `<top (required)>'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/spring-1.1.3/lib/spring/client/rails.rb:27:in `load'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/spring-1.1.3/lib/spring/client/rails.rb:27:in `call'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/spring-1.1.3/lib/spring/client/command.rb:7:in `call'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/spring-1.1.3/lib/spring/client.rb:26:in `run'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/spring-1.1.3/bin/spring:48:in `<top (required)>'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `load'
    from /home/ss/.rvm/gems/ruby-2.2.2/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `<top (required)>'
    from /home/ss/workspace/hartl/sample_app/bin/spring:13:in `require'
    from /home/ss/workspace/hartl/sample_app/bin/spring:13:in `<top (required)>'
    from bin/rails:4:in `load'
    from bin/rails:4:in `<main>'

2 answers

solution1
 4  2015-11-18 02:48:51

Alternatively, add this to your Gemfile: 

gem 'fog', '~> 1.36.0'

and run bundle install . This worked for me, because I was hitting a bug introduced in 1.35.0 : https://github.com/fog/fog/issues/3765

solution2
 3  2015-11-17 18:05:44

Add this to your Gemfile: 

gem 'net-ssh'

and run bundle install after that.

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