npm init錯誤，重新安裝了node也不行

mac環(huán)境，前段時間還正常，后來安裝了一些東西就不行了,使用 brew安裝，推卸重新安裝也不行，安裝任何包都提示這個錯誤

? demo$ npm init
module.js:545

throw err;
^

Error: Cannot find module '../lib/utils/unsupported.js'

at Function.Module._resolveFilename (module.js:543:15)
at Function.Module._load (module.js:470:25)
at Module.require (module.js:593:17)
at require (internal/module.js:11:18)
at /usr/local/lib/node_modules/npm/bin/npm-cli.js:19:21
at Object.<anonymous> (/usr/local/lib/node_modules/npm/bin/npm-cli.js:92:3)
at Module._compile (module.js:649:30)
at Object.Module._extensions..js (module.js:660:10)
at Module.load (module.js:561:32)
at tryModuleLoad (module.js:501:12)

? demo# npm i yarn
module.js:545

throw err;
^

Error: Cannot find module '../lib/utils/unsupported.js'

at Function.Module._resolveFilename (module.js:543:15)
at Function.Module._load (module.js:470:25)
at Module.require (module.js:593:17)
at require (internal/module.js:11:18)
at /usr/local/lib/node_modules/npm/bin/npm-cli.js:19:21
at Object.<anonymous> (/usr/local/lib/node_modules/npm/bin/npm-cli.js:92:3)
at Module._compile (module.js:649:30)
at Object.Module._extensions..js (module.js:660:10)
at Module.load (module.js:561:32)
at tryModuleLoad (module.js:501:12)