安装nodejs时出现“validBefore? true”？

Question

###1.问题描述
在对npm进行配置缓存和全局模块的的时候出现了“validBefore? true”
在node.js安装教程中其他人并没有出现这行语句,一开始没注意就继续往下安装，当我安装包的时候就报错了
版本号：
node v15.0.1
npm 7.0.3
之前使用过的教程链接如下：

https://blog.csdn.net/antma/article/details/86104068

环境变量参考的是：

https://blog.csdn.net/haisong/article/details/104585361/

接下来贴一下cmd中的代码

C:\Users\dell>npm config set prefix "C:\Program Files\nodejs\node_global"
validBefore? true

C:\Users\dell>npm config set cache "C:\Program Files\nodejs\node_cache"
validBefore? true

C:\Users\dell>npm install webpack -g
npm ERR! code EPERM
npm ERR! syscall mkdir
npm ERR! path C:\Program Files\nodejs\node_cache\_cacache
npm ERR! errno EPERM
npm ERR! FetchError: Invalid response body while trying to fetch https://registry.npmjs.org/webpack: EPERM: operation not permitted, mkdir 'C:\Program Files\nodejs\node_cache\_cacache'
npm ERR!     at C:\Program Files\nodejs\node_modules\npm\node_modules\minipass-fetch\lib\body.js:162:15
npm ERR!     at async Arborist.[buildDepStep] (C:\Program Files\nodejs\node_modules\npm\node_modules\@npmcli\arborist\lib\arborist\build-ideal-tree.js:760:11)
npm ERR!     at async Arborist.buildIdealTree (C:\Program Files\nodejs\node_modules\npm\node_modules\@npmcli\arborist\lib\arborist\build-ideal-tree.js:202:7)
npm ERR!     at async Arborist.reify (C:\Program Files\nodejs\node_modules\npm\node_modules\@npmcli\arborist\lib\arborist\reify.js:121:5)
npm ERR!     at async install (C:\Program Files\nodejs\node_modules\npm\lib\install.js:40:5)
npm ERR!  FetchError: Invalid response body while trying to fetch https://registry.npmjs.org/webpack: EPERM: operation not permitted, mkdir 'C:\Program Files\nodejs\node_cache\_cacache'
npm ERR!     at C:\Program Files\nodejs\node_modules\npm\node_modules\minipass-fetch\lib\body.js:162:15
npm ERR!     at async Arborist.[buildDepStep] (C:\Program Files\nodejs\node_modules\npm\node_modules\@npmcli\arborist\lib\arborist\build-ideal-tree.js:760:11)
npm ERR!     at async Arborist.buildIdealTree (C:\Program Files\nodejs\node_modules\npm\node_modules\@npmcli\arborist\lib\arborist\build-ideal-tree.js:202:7)
npm ERR!     at async Arborist.reify (C:\Program Files\nodejs\node_modules\npm\node_modules\@npmcli\arborist\lib\arborist\reify.js:121:5)
npm ERR!     at async install (C:\Program Files\nodejs\node_modules\npm\lib\install.js:40:5) {
npm ERR!   code: 'EPERM',
npm ERR!   errno: 'EPERM',
npm ERR!   syscall: 'mkdir',
npm ERR!   path: 'C:\\Program Files\\nodejs\\node_cache\\_cacache',
npm ERR!   type: 'system',
npm ERR!   requiredBy: '.'
npm ERR! }
npm ERR!
npm ERR! The operation was rejected by your operating system.
npm ERR! It's possible that the file was already in use (by a text editor or antivirus),
npm ERR! or that you lack permissions to access it.
npm ERR!
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator.

Answer 1

不知道你这个问题是否已经解决, 如果还没有解决的话:

• 可以查看手册：c语言-true 中的内容

如果你已经解决了该问题, 非常希望你能够分享一下解决方案, 写成博客, 将相关链接放在评论区, 以帮助更多的人 ^-^