npm ERR! code ENOLOCAL

Microsoft Windows [版本 6.1.]
版权所有 (c)  Microsoft Corporation。保留所有权利。

G:\vue>cnpm i vue-router -S
'cnpm' 不是内部或外部命令，也不是可运行的程序
或批处理文件。

G:\vue>npm install -g cnpm –registry=https://registry.npm.taobao.org
npm ERR! code ENOLOCAL
npm ERR! Could not install from "–registry=https:\registry.npm.taobao.org" as it does not contain a package.json file.

npm ERR! A complete log of this run can be found in:
npm ERR!     D:\Users\realm\AppData\Roaming\npm-cache\_logs\--08T13_37_40_758Z-debug.log

G:\vue>node -v
v12.13.1

G:\vue>npm install -g install
+ install@0.13.
updated  package in .087s

G:\vue>
G:\vue>
G:\vue>rm -r -f node_modules
'rm' 不是内部或外部命令，也不是可运行的程序
或批处理文件。

G:\vue>cpm install
'cpm' 不是内部或外部命令，也不是可运行的程序
或批处理文件。

G:\vue>cnpm install
'cnpm' 不是内部或外部命令，也不是可运行的程序
或批处理文件。

G:\vue>npm install -g cnpm –registry=https://registry.npm.taobao.org
npm ERR! code ENOLOCAL
npm ERR! Could not install from "–registry=https:\registry.npm.taobao.org" as it does not contain a package.json file.

npm ERR! A complete log of this run can be found in:
npm ERR!     D:\Users\realm\AppData\Roaming\npm-cache\_logs\--08T13_40_45_806Z-debug.log

G:\vue>npm install -g node-gyp
D:\Users\realm\AppData\Roaming\npm\node-gyp -> D:\Users\realm\AppData\Roaming\npm\node_modules\node-gyp\bin\node-gyp.js
+ node-gyp@6.0.
added  packages from  contributors and updated  packages in .358s

G:\vue>cnpm install
'cnpm' 不是内部或外部命令，也不是可运行的程序
或批处理文件。

G:\vue>npm install -g cnpm –registry=https://registry.npm.taobao.org
npm ERR! code ENOLOCAL
npm ERR! Could not install from "–registry=https:\registry.npm.taobao.org" as it does not contain a package.json file.

npm ERR! A complete log of this run can be found in:
npm ERR!     D:\Users\realm\AppData\Roaming\npm-cache\_logs\--08T13_44_18_594Z-debug.log

G:\vue>npm cache verify
Cache verified and compressed (~\AppData\Roaming\npm-cache\_cacache):
Content verified:  ( bytes)
Content garbage-collected:  ( bytes)
Index entries:
Finished in .516s

G:\vue>npm cache clean
npm ERR! As of npm@, the npm cache self-heals from corruption issues and data extracted from the cache is guaranteed to be valid. If you want to make sure everything is consistent, use 'npm cache verify' instead. On the other hand, if you're debugging an issue with the installer
, you can use `npm install --cache /tmp/empty-cache` to use a temporary cache instead of nuking the actual one.
npm ERR!
npm ERR! If you're sure you want to delete the entire cache, rerun this command with --force.

npm ERR! A complete log of this run can be found in:
npm ERR!     D:\Users\realm\AppData\Roaming\npm-cache\_logs\--08T13_48_53_767Z-debug.log

G:\vue>npm cache clean --force
npm WARN using --force I sure hope you know what you are doing.

G:\vue>npm install -g cnpm –registry=https://registry.npm.taobao.org
npm ERR! code ENOLOCAL
npm ERR! Could not install from "–registry=https:\registry.npm.taobao.org" as it does not contain a package.json file.

npm ERR! A complete log of this run can be found in:
npm ERR!     D:\Users\realm\AppData\Roaming\npm-cache\_logs\--08T13_49_35_280Z-debug.log

G:\vue>npm i -g npm
D:\Users\realm\AppData\Roaming\npm\npx -> D:\Users\realm\AppData\Roaming\npm\node_modules\npm\bin\npx-cli.js
D:\Users\realm\AppData\Roaming\npm\npm -> D:\Users\realm\AppData\Roaming\npm\node_modules\npm\bin\npm-cli.js
+ npm@6.13.
added  packages from  contributors in .607s

G:\vue>npm install -g cnpm --registry=http://registry.npm.taobao.org
D:\Users\realm\AppData\Roaming\npm\cnpm -> D:\Users\realm\AppData\Roaming\npm\node_modules\cnpm\bin\cnpm
+ cnpm@6.1.
added  packages from  contributors in .011s

G:\vue>

npm升级后，npm install 报错了，这就尴尬了。
Google了一下在这里(https://github.com/npm/npm/issues/16861)找到了解决方案：
里面各种解决方案，让Try这个命令Try那个命令，看着一脸懵逼不知道该用那个命令，浏览评论的时候发现“npm cache verify”这条命令帮助了不少人，然后果断在iterm2执行了，嗯，莫名其妙的好了。

评论里的命令有下面这些：

npm cache verify
npm cache clean
npm cache clean --force
npm i -g npm
grep -ir "sha1-xxxxxxxxxxxxxxxx" ~/.npm

实在不行就一条一条执行试试，看那个能帮到你