anchor.diff:   && rm -f node.tar.gz
   
   RUN npm install -g yarn \
  - && rm -rf $HOME/.npm
  + && rm -rf /root/.npm
   
   RUN yarn global add mocha istanbul nyc spec-xunit-file js-beautify eslint \
    && rm -rf /usr/local/share/.cache/yarn
  
positive.code:  && yum install -y ctags cscope \
   && yum clean all \
   && rm -rf /var/cache/yum/* \
   && curl -fSL https://raw.githubusercontent.com/subchen/dev-box/master/vim/config/.vimrc -o $HOME/.vimrc \
   && curl -fSL https://raw.githubusercontent.com/subchen/dev-box/master/vim/update-vim-plugins.sh | bash -e
  
  ################################################################
  
negative.code: RUN curl -fSL https://github.com/justjanne/powerline-go/releases/download/v$POWERLINE_VERSION/powerline-go-linux-amd64 -o /usr/local/bin/powerline-go \
   && chmod +x /usr/local/bin/powerline-go
  
  RUN mkdir -p /root/.bash \
   && curl -fSL https://raw.githubusercontent.com/subchen/dev-box/master/powerline-go/config/powerline-go.bash -o /root/.bash/powerline-go.bash \
   && echo ". /root/.bash/powerline-go.bash" >> /root/.bashrc
  
  ################################################################
  RUN yum install -y openssh-server openssh-clients \
  