Centos failed to install forever with npm.

  node.js, question

The system is centos7.0 64-bit
Node version is 5.6.0
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Knocknpm install forever -gafter
Finally, show this:
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Then it was found that forever was not installed. .
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After several unsuccessful attempts, what should I do?

4. Version X, which separates the generator, requires separate installation.

Npm install express -g just said that you can require. To generate project with Express under terminal, you also need to
$ npm install -g express-generator