node.js - Cannot install socket.IO -


i can't install socket.io. it's in virtualenv, if matters. learning blog , have installed till node js. can't install in ubuntu vm. error:

(chatn)robin@robin-virtualbox:~/webs/chatn$ sudo npm install socket.io npm http http://registry/socket.io npm http http://registry/socket.io npm http http://registry/socket.io npm http http://registry.npmjs.org/socket.io/-/socket.io-0.9.16.tgz npm http 503 http://registry.npmjs.org/socket.io/-/socket.io-0.9.16.tgz npm err! fetch failed http://registry.npmjs.org/socket.io/-/socket.io-0.9.16.tgz npm http http://registry.npmjs.org/socket.io/-/socket.io-0.9.16.tgz npm http 503 http://registry.npmjs.org/socket.io/-/socket.io-0.9.16.tgz npm err! fetch failed http://registry.npmjs.org/socket.io/-/socket.io-0.9.16.tgz npm http http://registry.npmjs.org/socket.io/-/socket.io-0.9.16.tgz npm http 200 http://registry.npmjs.org/socket.io/-/socket.io-0.9.16.tgz npm http http://registry/socket.io-client/0.9.16 npm http http://registry/policyfile/0.0.4 npm http http://registry/base64id/0.1.0 npm http http://registry/redis/0.7.3 npm http http://registry/socket.io-client/0.9.16 npm http http://registry/policyfile/0.0.4 npm http http://registry/redis/0.7.3 npm http http://registry/base64id/0.1.0 npm http http://registry/redis/0.7.3 npm http http://registry/base64id/0.1.0 npm warn optional dep failed, continuing redis@0.7.3 npm err! network getaddrinfo enotfound npm err! network not problem npm npm err! network , related network connectivity. npm err! network in cases behind proxy or have bad network settings. npm err! network  npm err! network if behind proxy, please make sure npm err! network 'proxy' config set properly.  see: 'npm config'  npm err! system linux 3.11.0-12-generic npm err! command "/usr/bin/node" "/usr/bin/npm" "install" "socket.io" npm err! cwd /home/robin/webs/chatn npm err! node -v v0.10.26 npm err! npm -v 1.4.3 npm err! syscall getaddrinfo npm err! code enotfound npm err! errno enotfound npm http http://registry/socket.io-client/0.9.16 npm http http://registry/policyfile/0.0.4 npm err!  npm err! additional logging details can found in: npm err!     /home/robin/webs/chatn/npm-debug.log npm err! not ok code 0

i don't know what's happening here.

update:

tried installing 'yeoman' again got message:

advenio@advenio-virtualbox:~$ npm install -g yo npm http http://registry/yo npm http http://registry/yo npm http http://registry/yo npm err! network getaddrinfo enotfound npm err! network not problem npm npm err! network , related network connectivity. npm err! network in cases behind proxy or have bad network settings. npm err! network  npm err! network if behind proxy, please make sure npm err! network 'proxy' config set properly.  see: 'npm config'  npm err! system linux 3.11.0-12-generic npm err! command "/usr/bin/node" "/usr/bin/npm" "install" "-g" "yo" npm err! cwd /home/advenio npm err! node -v v0.10.26 npm err! npm -v 1.4.3 npm err! syscall getaddrinfo npm err! code enotfound npm err! errno enotfound npm err!  npm err! additional logging details can found in: npm err!     /home/advenio/npm-debug.log npm err! not ok code 0


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