我正在使用npm从命令行安装打字输出,它似乎运行良好但我输入任何打字命令,它说该命令不存在！

它类似于：

Kevyns-MacBook-Pro:~ kevynquiros$sudo npm install typings --global
Password:
/Users/kevynquiros/npm/bin/typings -> /Users/kevynquiros/npm/lib/node_modules/typings/dist/bin.js
typings@1.0.4 /Users/kevynquiros/npm/lib/node_modules/typings
├── listify@1.0.0
├── xtend@4.0.1
├── wordwrap@1.0.0
├── archy@1.0.0
├── minimist@1.2.0
├── any-promise@1.3.0
├── bluebird@3.4.0
├── chalk@1.1.3 (supports-color@2.0.0,escape-string-regexp@1.0.5,ansi-styles@2.2.1,has-ansi@2.0.0,strip-ansi@3.0.1)
├── columnify@1.5.4 (strip-ansi@3.0.1,wcwidth@1.0.1)
├── update-notifier@0.7.0 (is-npm@1.0.0,xdg-basedir@2.0.0,semver-diff@2.1.0,ansi-align@1.0.0,Boxen@0.5.1,configstore@2.0.0,latest-version@2.0.0)
└── typings-core@1.0.1 (array-uniq@1.0.2,thenify@3.2.0,zip-object@0.1.0,popsicle-status@2.0.0,graceful-fs@4.1.4,popsicle-retry@3.1.0,throat@2.0.2,lockfile@1.0.1,promise-finally@2.2.0,string-template@1.0.0,strip-bom@2.0.0,sort-keys@1.1.2,make-error-cause@1.1.0,debug@2.2.0,has@1.0.1,rc@1.1.6,object.pick@1.1.2,parse-json@2.2.0,invariant@2.2.1,detect-indent@4.0.0,mkdirp@0.5.1,touch@1.0.0,is-absolute@0.2.5,popsicle-proxy-agent@2.0.1,rimraf@2.5.2,typescript@1.8.7,popsicle@6.2.0)

然后就是这样：

Kevyns-MacBook-Pro:~ kevynquiros$typings search tape
-bash: typings: command not found

请帮忙！