npm 全局包安装时 Git SSH 公钥权限拒绝错误排查

报错信息

执行 npm 全局包安装或更新操作时，终端输出如下核心报错信息：

npm error code 128
npm error An unknown git error occurred
npm error command git --no-replace-objects ls-remote ssh://[email protected]/xxx/xxx.git
npm error [email protected]: Permission denied (publickey)
npm error fatal: Could not read