在使用npm安装软件是报异常 code EACCES ， 其实就权限不足

1、异常内容

pm ERR! code EACCES
npm ERR! syscall mkdir
npm ERR! path /usr/local/lib/node_modules/wscat
npm ERR! errno -13
npm ERR! Error: EACCES: permission denied, mkdir '/usr/local/lib/node_modules/wscat'
npm ERR!  [Error: EACCES: permission denied, mkdir '/usr/local/lib/node_modules/wscat'] {
npm ERR!   errno: -13,
npm ERR!   code: 'EACCES',
npm ERR!   syscall: 'mkdir',
npm ERR!   path: '/usr/local/lib/node_modules/wscat'
npm ERR! }
npm ERR! 

2、解决方法

 sudo chown -R $USER /usr/local/lib/node_modules