软件安装及配置（ubuntu）——离线安装node.js和npm

参考链接：

https://blog.csdn.net/topswim/article/details/79200936

http://www.360doc.com/content/17/0911/11/14627542_686188865.shtml

https://www.cnblogs.com/laozhbook/p/npm_help.html

npm离线安装webpack

http://www.voidcn.com/article/p-qdcrpdyo-bpy.html