安装vue时，出现如下错误：
E:QianDuanVue3>npm install -g @vue/cli
npm ERR! code EPERM
npm ERR! syscall mkdir
npm ERR! path D:Program Files odejs ode_cache_cacache
npm ERR! errno -4048
npm ERR! Error: EPERM: operation not permitted, mkdir ‘D:Program Files odejs ode_cache_cacache’
npm ERR! [OperationalError: EPERM: operation not permitted, mkdir ‘D:Program Files odejs ode_cache_cacache’] {
npm ERR! cause: [Error: EPERM: operation not permitted, mkdir ‘D:Program Files odejs ode_cache_cacache’] {
npm ERR! errno: -4048,
npm ERR! code: ‘EPERM’,
npm ERR! syscall: ‘mkdir’,
npm ERR! path: ‘D:Program Files odejs ode_cache_cacache’
npm ERR! },
npm ERR! isOperational: true,
npm ERR! errno: -4048,
npm ERR! code: ‘EPERM’,
npm ERR! syscall: ‘mkdir’,
npm ERR! path: ‘D:Program Files odejs ode_cache_cacache’
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.
解决方法：
1、删除C:Users{你的用户文件夹}/目录中的.npmrc文件，一般为隐藏，记得选中“隐藏的项目”。
2、用管理员模式运行cmd。