翻墙用的是shadowsocks 日本的ip 终端报错：

npm ERR! tar.unpack untar error /tmp/npm-2435-53efd37e/registry.npmjs.org/npm/-/npm-2.1.3.tgz
npm ERR! Darwin 14.3.0
npm ERR! argv "node" "/usr/local/bin/npm" "install" "-g" "ionic"
npm ERR! node v0.12.5
npm ERR! npm  v2.11.2

npm ERR! unexpected eof
npm ERR! 
npm ERR! If you need help, you may report this error at:
npm ERR!     <https://github.com/npm/npm/issues>

npm ERR! Please include the following file with any support request:
npm ERR!     /Users/tomoya/npm-debug.log

求解决办法