npm install 总是报错(Mac OS环境下)

mac使用npm安装hexo，输入命令：

npm install -g hexo-cli

报错如下：[/code]
npm ERR! Darwin 14.5.0

npm ERR! argv "/Users/wangmaster/.nvm/versions/node/v4.4.2/bin/node" "/Users/wangmaster/.nvm/versions/node/v4.4.2/bin/npm" "install" "-g" "hexo-cli"

npm ERR! node v4.4.2

npm ERR! npm v2.15.0

npm ERR! path /Users/wangmaster/.nvm/versions/node/v4.4.2/lib/node_modules/hexo-cli/.editorconfig

npm ERR! code EACCES

npm ERR! errno -13

npm ERR! syscall unlink

npm ERR! Error: EACCES: permission denied, unlink '/Users/wangmaster/.nvm/versions/node/v4.4.2/lib/node_modules/hexo-cli/.editorconfig'

npm ERR! at Error (native)

npm ERR! { [Error: EACCES: permission denied, unlink '/Users/wangmaster/.nvm/versions/node/v4.4.2/lib/node_modules/hexo-cli/.editorconfig']

npm ERR! errno: -13,

npm ERR! code: 'EACCES',

npm ERR! syscall: 'unlink',

npm ERR! path: '/Users/wangmaster/.nvm/versions/node/v4.4.2/lib/node_modules/hexo-cli/.editorconfig' }

npm ERR!

npm ERR! Please try running this command again as root/Administrator.

npm ERR! error rolling back Error: EACCES: permission denied, unlink '/Users/wangmaster/.nvm/versions/node/v4.4.2/lib/node_modules/hexo-cli/.editorconfig'

npm ERR! error rolling back at Error (native)

npm ERR! error rolling back { [Error: EACCES: permission denied, unlink '/Users/wangmaster/.nvm/versions/node/v4.4.2/lib/node_modules/hexo-cli/.editorconfig']

npm ERR! error rolling back errno: -13,

npm ERR! error rolling back code: 'EACCES',

npm ERR! error rolling back syscall: 'unlink',

npm ERR! error rolling back path: '/Users/wangmaster/.nvm/versions/node/v4.4.2/lib/node_modules/hexo-cli/.editorconfig' }

npm ERR! Please include the following file with any support request:

npm ERR! /Users/wangmaster/Desktop/Blog/npm-debug.log

解决方案：

　　- 加上sudo执行：

即：

sudo npm install -g hexo-cli
按回车，输入机器密码即可。