用gem install jekyll命令安装jekyll错误 ERROR: Failed to build gem native extension

问题描述：

在Ubuntu系统下先通过指令sudo apt-get install ruby 安装ruby开发环境，然后用命令行 gem install jekyll 安装github page的开发工具jekyll，遇到了错误信息：ERROR: Failed to build gem native extension 详细信息如下：

ERROR:  Error installing jekyll:
    ERROR: Failed to build gem native extension.

    current directory: /var/lib/gems/2.3.0/gems/ffi-1.9.18/ext/ffi_c
/usr/bin/ruby2.3 -r ./siteconf20170316-3892-175h62n.rb 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/2.3.0/gems/ffi-1.9.18 for inspection.
Results logged to /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/ffi-1.9.18/gem_make.out

解决办法：

既然是github page的开发工具，在github上很容易找到解决办法：

意思是在Ubuntu 默认的apt-get安装ruby时，没有安装ruby-dev，需在terminal中输入sudo apt-get intall ruby-dev 即可。亲测，问题解决。