I run this command in my project folder 

```
    npm install --global webpack webpack-dev-server

```

it return:

```
   /usr/lib

     ├── webpack@1.14.0
     └── webpack-dev-server@1.16.2

```

webpack and webpack-dev-server folders are under /usr/lib/node\_modules, webpack command works, webpack-dev-server command return:

```
 webpack-dev-server: command not found

```

the configure json:

```
  "webpack": "^1.14.0",
  "webpack-dev-server": "^1.9.0" 

```

I also tried install in without -g, there is node\_modules under the project folder, and .bin folder under node\_modules. However webpack-dev-server is out of node\_modules folder. I try move webpack-dev-server into .bin. it does not work either.