错误信息
执行命令: sudo gem install sass时遇到下面的错误信息
Building native extensions. This Could take a while...
ERROR: Error installing sass:
ERROR: Failed to build gem native extension.
current directory: /var/lib/gems/2.5.0/gems/ffi-1.11.1/ext/ffi_c
/usr/bin/ruby2.5 -r ./siteconf20190522-24821-9c6o4.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/2.5.0/gems/ffi-1.11.1 for @R_502_3174@.
Results logged to /var/lib/gems/2.5.0/extensions/x86_64-linux/2.5.0/ffi-1.11.1/gem_make.out解决
原先安装ruby用的命令是: sudo apt install ruby
改用命令sudo apt install ruby-full安装ruby，然后再用命令sudo gem install sass成功安装sass。
题外话：
更换gem的安装源
//1.删除原gem源
gem sources --remove https://rubygems.org/
//2.添加国内镜像
gem source -a https://gems.ruby-china.com
//3.打印是否替换成功
gem sources -l
//4.更换成功后打印如下
*** CURRENT SOURCES ***
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