CODEWITHSUNDEEP
ruby-on-railsruby
Erik Aasland
Erik Aasland

Reputation: 167

Unable to install Rails. Getting Error message.

Ubuntu is such a pain sometimes. I am trying to install a specific version of rails (4.2.2) for the Rails tutorial I am doing and my commandline is screaming this code at me in response. Could someone point me in the right direction? Thank you.

I first put...

sudo gem install rails -v 4.2.2

and then I get this big ugly thing... 

Building native extensions.  This could take a while...
ERROR:  Error installing rails:
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 /var/lib/gems/1.9.1/gems/json-1.8.3 for inspection.
Results logged to /var/lib/gems/1.9.1/gems/json-1.8.3/ext/json/ext/generator/gem_make.out

Upvotes: 0

Views: 820

Answers (2)

tompave
tompave

Reputation: 12412

You might want to look at this question.

Also, you seem to be using a default system ruby installed via apt-get. Consider using rvm instead, as it automatically takes care of installing missing dependencies via your package manager.

Upvotes: 1

Rod Argumedo
Rod Argumedo

Reputation: 614

You may want to update your RubyGems because Rails 4.2 requires the latest version of RubyGems. Run gem update --system to get the latest dependencies and then gem install rails -v 4.2.2 and the error should go away.

Upvotes: 1

Related Questions