`require': no such file to load -- mkmf (LoadError)

`require': no such file to load -- mkmf (LoadError)

ruby-on-rails ubuntu

ruby-on-rails

Unable to install gem - Failed to build gem native extension - cannot load such file -- mkmf (LoadError)

ruby-on-rails ruby ubuntu gem bcrypt

ruby-on-rails

How do I use gems with Ubuntu?

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ruby-on-rails

How to stop a Daemon Server in Rails?

ruby-on-rails ubuntu

ruby-on-rails

Installing PostgreSQL on Ubuntu for Ruby on Rails

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ruby-on-rails

Listen error: unable to monitor directories for changes

ruby-on-rails ruby ubuntu

ruby-on-rails

How to use gem to install Rails on Ubuntu

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ruby-on-rails

How can I uninstall Ruby on ubuntu?

ruby-on-rails ruby ubuntu uninstallation

ruby-on-rails

How to check rails environment?

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ruby-on-rails

Can I install gems with apt-get on Ubuntu?

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ruby-on-rails

Error installing Nokogiri 1.5.0 with rails 3.1.0 and ubuntu

ruby-on-rails ubuntu nokogiri bundler

ruby-on-rails

Can't stop WEBrick 1.3.1 with ctrl-c on Ubuntu 11.04

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ruby-on-rails

Installing Rails: "File not found: lib" [duplicate]

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ruby-on-rails

How to set up Postgres database for local Rails project?

ruby-on-rails postgresql ubuntu postgresql-9.1 rails-postgresql

ruby-on-rails

Can I install Pow on my Ubuntu?

ruby-on-rails ubuntu rack-pow

ruby-on-rails