我在我的 Ubuntu 笔记本电脑上使用 Jekyll。它适用于 15.10。我已升级到 16.04，但收到此错误消息：
$ jekyll -v
bash: /usr/local/bin/jekyll : /usr/bin/ruby2.1 : bad interpreter: no file or folder
这是已安装的 Ruby 版本：
$ ruby -v
ruby 2.3.0p0 (2015-12-25) [i386-linux-gnu]
我试过了：
$ gem update jekyll
Updating installed gems
Nothing to update
作为which ruby回报/usr/bin/ruby，我已更新/usr/local/bin/jekyll更改#!/usr/bin/ruby2.1为#!/usr/bin/ruby.
现在我得到：
$ jekyll -v
/usr/lib/ruby/2.3.0/rubygems/dependency.rb:319:in 'to_specs': Could not find 'jekyll' (>= 0) among 11 total gem(s) (Gem::LoadError)
Checked in 'GEM_PATH=/home/samuel/.gem/ruby/2.3.0:/var/lib/gems/2.3.0:/usr/lib/i386-linux-gnu/rubygems-integration/2.3.0:/usr/share/rubygems-integration/2.3.0:/usr/share/rubygems-integration/all', execute 'gem env` for more information
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