'rest_client' vs 'rest-client'エラー

Question

ruby​​でrest-client gemを使用しようとしても、エラーが発生することがあります： "警告：rest_client gemは廃止され、RubyGemsから削除されます。 "

Building native extensions. This could take a while... 
ERROR: Error installing rest-client: 
     ERROR: Failed to build gem native extension. 

    /usr/bin/ruby2.1 mkrf_conf.rb 
Building native extensions. This could take a while... 
/usr/lib/ruby/2.1.0/rubygems/ext/builder.rb:89:in `run': ERROR: Failed to build gem native extension. (Gem::Ext::BuildError) 

    /usr/bin/ruby2.1 extconf.rb 
mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h 

extconf failed, exit code 1 

Gem files will remain installed in /var/lib/gems/2.1.0/gems/unf-0.2.0.beta2/ext/gems/gems/unf_ext-0.0.7.2 for inspection. 
Results logged to /var/lib/gems/2.1.0/gems/unf-0.2.0.beta2/ext/gems/extensions/x86_64-linux/2.1.0/unf_ext-0.0.7.2/gem_make.out 
     from /usr/lib/ruby/2.1.0/rubygems/ext/ext_conf_builder.rb:38:in `block in build' 
     from /usr/lib/ruby/2.1.0/tempfile.rb:324:in `open' 
     from /usr/lib/ruby/2.1.0/rubygems/ext/ext_conf_builder.rb:17:in `build' 
     from /usr/lib/ruby/2.1.0/rubygems/ext/builder.rb:161:in `block (2 levels) in build_extension' 
     from /usr/lib/ruby/2.1.0/rubygems/ext/builder.rb:160:in `chdir' 
     from /usr/lib/ruby/2.1.0/rubygems/ext/builder.rb:160:in `block in build_extension' 
     from /usr/lib/ruby/2.1.0/rubygems/ext/builder.rb:159:in `synchronize' 
     from /usr/lib/ruby/2.1.0/rubygems/ext/builder.rb:159:in `build_extension' 
     from /usr/lib/ruby/2.1.0/rubygems/ext/builder.rb:198:in `block in build_extensions' 
     from /usr/lib/ruby/2.1.0/rubygems/ext/builder.rb:195:in `each' 
     from /usr/lib/ruby/2.1.0/rubygems/ext/builder.rb:195:in `build_extensions' 
     from /usr/lib/ruby/2.1.0/rubygems/installer.rb:677:in `build_extensions' 
     from /usr/lib/ruby/2.1.0/rubygems/installer.rb:232:in `install' 
     from /usr/lib/ruby/2.1.0/rubygems/resolver/specification.rb:78:in `install' 
     from /usr/lib/ruby/2.1.0/rubygems/request_set.rb:206:in `block in install_into' 
     from /usr/lib/ruby/2.1.0/rubygems/request_set.rb:198:in `each' 
     from /usr/lib/ruby/2.1.0/rubygems/request_set.rb:198:in `install_into' 
     from /usr/lib/ruby/2.1.0/rubygems/request_set.rb:119:in `install' 
     from /usr/lib/ruby/2.1.0/rubygems/dependency_installer.rb:389:in `install' 
     from mkrf_conf.rb:15:in `<main>' 

rake failed, exit code 1 

Gem files will remain installed in /var/lib/gems/2.1.0/gems/unf-0.2.0.beta2 for inspection. 
Results logged to /var/lib/gems/2.1.0/extensions/x86_64-linux/2.1.0/unf-0.2.0.beta2/gem_make.out 

：私のコードは、私は '宝石のインストール残り-client' を実行しようとするとき、それはで失敗し、また

#!/usr/bin/ruby 

require 'rest-client' 

「残り-クライアントのではなく 'rest_client' を使用していても

助けてくれてありがとう

Answer 1

私はruby devをインストールしていませんでした。

gem install: Failed to build gem native extension (can't find header files)

sudo apt-get install ruby-dev 

が