ubuntu16.04 安装 gem install rails报错解决

当执行gem install rails时报错，报错信息：

 Building native extensions.  This could take a while...    ERROR:  Error installing rails:ERROR: Failed to build gem native extension.    /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb    mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/include/ruby.h    Gem files will remain installed in /Library/Ruby/Gems/2.0.0/gems/atomic-1.1.14 for inspection           Results logged to /Library/Ruby/Gems/2.0.0/gems/atomic-1.1.14/ext/gem_make.out

解决办法

1. gem update --system2. sudo apt-get install ruby-dev