执行bower命令后出现以下错误提示：

bower ESUDO         Cannot be run with sudoAdditional error details:Since bower is a user command, there is no need to execute it with superuser permissions.If you're having permission errors when using bower without sudo, please spend a few minutes learning more about how your system should work and make any necessary repairs.http://www.joyent.com/blog/installing-node-and-npmhttps://gist.github.com/isaacs/579814You can however run a command with sudo using --allow-root option

解决方法有两种：

   1，根据错误提示在bower命令后面加--allow-root ，例如 bower install --allow-root

   2，增加一个配置文件使得运行bower时候为root权限，~/.bowerrc

内容如下

{"allow_root": true }