我尝试在 mac 中安装 gulp，如下所示：
Is-iMac:~ itop$ npm root
/Users/itop/node_modules
Is-iMac:~ itop$ npm config set prefix /usr/local
Is-iMac:~ itop$ npm root -g
/usr/local/lib/node_modules
Is-iMac:~ itop$ sudo npm install -g gulp
安装后我在终端中看到此错误：
npm WARN deprecated [email protected] /cdn-cgi/l/email-protection: graceful-fs version 3 and before will fail on newer node releases. Please update to graceful-fs@^4.0.0 as soon as possible.
npm WARN deprecated [email protected] /cdn-cgi/l/email-protection: lodash@<3.0.0 is no longer maintained. Upgrade to lodash@^4.0.0.
npm WARN deprecated [email protected] /cdn-cgi/l/email-protection: graceful-fs version 3 and before will fail on newer node releases. Please update to graceful-fs@^4.0.0 as soon as possible.
npm ERR! Darwin 15.3.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "-g" "gulp"
npm ERR! node v5.6.0
npm ERR! npm v3.8.0
npm ERR! path /usr/local/bin/gulp
npm ERR! code EEXIST
npm ERR! Refusing to delete /usr/local/bin/gulp: ../lib/node_modules/gulp-cli/bin/gulp.js symlink target is not controlled by npm /usr/local
npm ERR! File exists: /usr/local/bin/gulp
npm ERR! Move it away, and try again.
npm ERR! Please include the following file with any support request:
npm ERR! /Users/it/npm-debug.log
现在当我输入时gulp对于在终端中启动/运行，我看到此错误：
-bash: gulp: command not found
EDIT:我尝试用这个评论阿奇航行者 https://stackoverflow.com/users/5652719/archie-voyageur:
npm install --global gulp-cli
并看到这个错误：
/usr/local/bin/gulp -> /usr/local/lib/node_modules/gulp-cli/bin/gulp.js
npm ERR! Darwin 15.3.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "--global" "gulp-cli"
npm ERR! node v5.6.0
npm ERR! npm v3.8.0
npm ERR! path /usr/local/share/man/man1/gulp.1
npm ERR! code EEXIST
npm ERR! Refusing to delete /usr/local/share/man/man1/gulp.1: ../../../lib/node_modules/gulp/gulp.1 symlink target is not controlled by npm /usr/local
npm ERR! File exists: /usr/local/share/man/man1/gulp.1
npm ERR! Move it away, and try again.
npm ERR! Please include the following file with any support request:
npm ERR! /Users/itop/npm-debug.log
如何解决这个问题？
我自己刚刚遇到这个问题并设法解决它：
$ npm uninstall --global gulp gulp-cli
$ rm /usr/local/share/man/man1/gulp.1
$ npm install --global gulp-cli
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