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：

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。