# Npm-rebuild

日常开发中 经常遇见`npm install`失败后再怎么install都不成功问题，在那儿install磨叽半天 么得结果，有一天队友上来一个命令教做人了，那就是`npm rebuild`。那这样就得来看`rebuild`是什么操作了。 使用：

> npm rebuild \[\[@scope/name]...]

官方是这样说的：

> This command runs the `npm build` command on the matched folders. This is useful when you install a new version of node, and must recompile all your C++ addons with the new binary.

意思就是`rebuild`命令其实是在相应的目录运行了一下`build`命令（这不废话么，re-xxx不就是重复做xxx事么）。当你安装了新版本的node时，必须重新编译`C++`依赖。

所以最常见的场景是切换node版本时。

参考： [npm-rebuild](https://docs.npmjs.com/cli/rebuild)


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