1. Use npm install nrm, and a global installation package nrm
above sea level, NRM g
2. nrm ls View all available current mirror source address and the source address of the current mirror used
3. nrm use npm or nrm use different switching mirror source address taobao
Note: nrm just simply download package provides several common URL address, and allows us to easily switch between these addresses, but every time we install the package when the package installation tools are used npm