尝试运行bootstrap-4.1.1 doc软件包。注意文件是Jekyll模板。因此，我在这里使用此指南安装Jekyll： https://www.unixmen.com/installing-jekyll-ubuntu-15-10/
安装后，运行jekyll -v给我以下错误：
jekyll -v/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- bundler (LoadError)
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /var/lib/gems/2.3.0/gems/jekyll-3.8.3/lib/jekyll/plugin_manager.rb:48:in `require_from_bundler'
from /var/lib/gems/2.3.0/gems/jekyll-3.8.3/exe/jekyll:11:in `<top (required)>'
from /usr/local/bin/jekyll:22:in `load'
from /usr/local/bin/jekyll:22:in `<main>'
我正在运行ubuntu 17.10，对此需要一些帮助