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linux通过命令**npm install -g angular-cli@latest**
报错，报错信息如下
```
Unable to save binary /usr/local/nodejs/lib/node_modules/angular-cli/node_modules/node-sass/vendor/linux-x64-64 : { Error: EACCES: permission denied, mkdir '/usr/local/nodejs/lib/node_modules/angular-cli/node_modules/node-sass/vendor'
    at Object.mkdirSync (fs.js:752:3)
    at sync (/usr/local/nodejs/lib/node_modules/angular-cli/node_modules/mkdirp/index.js:71:13)
    at Function.sync (/usr/local/nodejs/lib/node_modules/angular-cli/node_modules/mkdirp/index.js:77:24)
    at checkAndDownloadBinary (/usr/local/nodejs/lib/node_modules/angular-cli/node_modules/node-sass/scripts/install.js:114:11)
    at Object.<anonymous> (/usr/local/nodejs/lib/node_modules/angular-cli/node_modules/node-sass/scripts/install.js:157:1)
    at Module._compile (internal/modules/cjs/loader.js:701:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:712:10)
    at Module.load (internal/modules/cjs/loader.js:600:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:539:12)
    at Function.Module._load (internal/modules/cjs/loader.js:531:3)
  errno: -13,
  syscall: 'mkdir',
  code: 'EACCES',
  path:
   '/usr/local/nodejs/lib/node_modules/angular-cli/node_modules/node-sass/vendor' }
```
发现需要把加上 --unsafe-perm
**npm install --unsafe-perm -gangular-cli@latest**