About node. JS cannot use the Express command after installing Express

The landlord sequence dog, recently in the study of some things in the foreground, and then want to understand the next node. js, follow the example of the search to install.

After installing Express, found that follow his verification method entered the EXPRESS-V command to verify the success of the installation, the results found that the prompt command is not available

What do we do? The speculation is that the Express version is updated, but we don't know how to play the new version. So I had to remove the currently installed express and reinstall the previous version to try it. Test OK.

The commands used here are

Uninstall: NPM Uninstall-g Express

Install the specified version: NPM install-g [email protected]

View version: Express-v

Note that the V in Express-v is capitalized, otherwise it will not be recognized in many versions

Of course, you just want to solve the problem that the Express command does not recognize. You've reached your goal at this point. But why don't we use the new version?

Originally, the command tool was separated from the latest express4.0 version (Project address: https://github.com/expressjs/generator), so we also need to install a command tool, the command is as follows:

NPM install-g Express-generator

Print success, all right, forgive my ignorance.

About node. JS cannot use the Express command after installing Express