1、阿里云Ubuntu镜像下载链接
http://mirrors.aliyun.com/ubuntu-releases/
2、maven依赖版本查询
3、科大博客提供 Google Fonts 加速
https://servers.ustclug.org/2014/06/blog-googlefonts-speedup/
http://mirrors.aliyun.com/ubuntu-releases/
https://servers.ustclug.org/2014/06/blog-googlefonts-speedup/