Angular CLI 安装时报syscall unlink错误解决方法

前提：已经完成了node js 的安装。
步骤：
按照网上的命令打开cmd直接执行以下命令：

 npm install -g @angular/cli

由于node-sass包被墙，可能会安装报错，此时执行以下语句：

npm install cnpm -g --registry=https://registry.npm.taobao.org

安装淘宝cnpm时，系统报错：

npm WARN deprecated socks@1.1.10: If using 2.x branch, please upgrade to at least 2.1.6 to avoid a serious bug with socket data flow and an import issue introduced in 2.1.0
npm WARN tarball tarball data for moment@^2.18.1 (sha1-PCV/mDn8DpP/UxSWMiOeuQeD/2Y=) seems to be corrupted. Trying one more time.
npm ERR! path C:\Users\zhangjixun01\AppData\Roaming\npm\node_modules\.staging\moment-78cea585\min\locales.js
npm ERR! code EPERM
npm ERR! errno -4048
npm ERR! syscall unlink
npm ERR! Error: EPERM: operation not permitted, unlink 'C:\Users\zhangjixun01\AppData\Roaming\npm\node_modules\.staging\moment-78cea585\min\locales.js'
npm ERR!  { [Error: EPERM: operation not permitted, unlink 'C:\Users\zhangjixun01\AppData\Roaming\npm\node_modules\.staging\moment-78cea585\min\locales.js']
npm ERR!   cause:
npm ERR!    { Error: EPERM: operation not permitted, unlink 'C:\Users\zhangjixun01\AppData\Roaming\npm\node_modules\.staging\moment-78cea585\min\locales.js'
npm ERR!      errno: -4048,
npm ERR!      code: 'EPERM',
npm ERR!      syscall: 'unlink',
npm ERR!      path:
npm ERR!       'C:\\Users\\zhangjixun01\\AppData\\Roaming\\npm\\node_modules\\.staging\\moment-78cea585\\min\\locales.js' },
npm ERR!   stack:
npm ERR!    'Error: EPERM: operation not permitted, unlink \'C:\\Users\\zhangjixun01\\AppData\\Roaming\\npm\\node_modules\\.staging\\moment-78cea585\\min\\locales.js\'',
npm ERR!   errno: -4048,
npm ERR!   code: 'EPERM',
npm ERR!   syscall: 'unlink',
npm ERR!   path:
npm ERR!    'C:\\Users\\zhangjixun01\\AppData\\Roaming\\npm\\node_modules\\.staging\\moment-78cea585\\min\\locales.js',
npm ERR!   parent: 'cnpm' }
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 (though this is not recommended).npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\zhangjixun01\AppData\Roaming\npm-cache\_logs\2018-08-06T07_00_55_009Z-debug.log

说是权限问题，但我权限都放开了试了一遍也不行，又换了以下方法安装：
1.安装node-sass包：

set SASS_BINARY_SITE=https://npm.taobao.org/mirrors/node-sass/npm install node-sass

2.然后再直接安装angular：

npm install -g @angular/cli

此时成功！运行ng -v命令后：

>ng -v_                      _                 ____ _     ___/ \   _ __   __ _ _   _| | __ _ _ __     / ___| |   |_ _|/ △ \ | '_ \ / _` | | | | |/ _` | '__|   | |   | |    | |/ ___ \| | | | (_| | |_| | | (_| | |      | |___| |___ | |/_/   \_\_| |_|\__, |\__,_|_|\__,_|_|       \____|_____|___||___/Angular CLI: 6.1.2
Node: 10.8.0
OS: win32 x64
Angular:
...Package                      Version
------------------------------------------------------
@angular-devkit/architect    0.7.2
@angular-devkit/core         0.7.2
@angular-devkit/schematics   0.7.2
@schematics/angular          0.7.2
@schematics/update           0.7.2
rxjs                         6.2.2
typescript                   2.7.2

可以继续接下来的创建新项目了。
（楼主小白，请大家多多指教，笔芯）

更新：翻了外网，发现有老外指出是AppData\Roaming下的两个包
npm
npm-cache的问题，删掉即可。

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