ubantu中安装express出现这种问题，在线等解答

wangle@wangle-Lenovo-IdeaPad-Y400:~/app$ npm install express /home/wangle └── express@4.14.0

npm WARN enoent ENOENT: no such file or directory, open '/home/wangle/package.json' npm WARN wangle No description npm WARN wangle No repository field. npm WARN wangle No README data npm WARN wangle No license field.