Resolve NPM's Shasum check failed for error (NPM registration domestic mirroring introduction)

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Use NPM to install some packages failed to look over (NPM domestic mirror introduction)

This is also online search, personally tried, very easy to use.

Mirror use Method (three methods any one can solve the problem, it is recommended to use a third, the configuration will be written dead, the next time the configuration is still in):

1. Through config command

NPM Config Set registry http://registry.cnpmjs.org 
NPM Info underscore (if the above configuration is correct, this command will have a string response)

2. Command line designation

3. Edit ~/.NPMRC Add the following content

Registry = http://registry.cnpmjs.org

Search Mirror: http://cnpmjs.org

Establish or use mirrors, reference: https://github.com/fenmgk2/cnpmjs.org