错误描述：
[root@eshop-cache01 local]# gem install redis
ERROR: Loading command: install (LoadError)
cannot load such file -- zlib
ERROR: While executing gem ... (NoMethodError)
undefined method `invoke_with_build_args' for nil:NilClass
解决方案：
报错原因
缺少zlib库依赖
解决报错
1 首先安装zlib库
yum install zlib-devel
2 集成zlib库到Ruby环境
进入到相关目录# cd ruby-2.3.8/ext/zlib
# ruby extconf.rb
checking for deflateReset() in -lz... yes
checking for zlib.h... yes
checking for crc32_combine() in zlib.h... yes
checking for adler32_combine() in zlib.h... yes
checking for z_crc_t in zlib.h... yes
creating Makefile
# make
linking shared-object zlib.so
# make install
/bin/install -c -m 0755 zlib.so /usr/local/ruby/lib/ruby/site_ruby/2.3.0/x86_64-linux
参考链接