hubot- rocket.chat adapter installing problem

I am installing hubot-rocket.chat adapter using https://github.com/RocketChat/hubot-rocketchat “add adapter to hubot” section. when i get to the step of yo hubot --owner=“OWNER owner@example.com” --name=“bot” --description=“Bot” --adapter=“rocketchat”, i got error message:

npm ERR! Linux 4.4.0-38-generic npm ERR! argv “/usr/local/bin/node” “/usr/local/bin/npm” “install” “hubot” “hubot-scripts” “hubot-diagnostics” “hubot-help” “hubot-heroku-keepalive” “hubot-google-images” “hubot-google-translate” “hubot-pugme” “hubot-maps” “hubot-redis-brain” “hubot-rules” “hubot-shipit” “hubot-rocketchat@1.0.5” “–save” npm ERR! node v4.5.0 npm ERR! npm v3.10.8 npm ERR! path /home/jy/.npm/commander/2.6.0 npm ERR! code EACCES npm ERR! errno -13 npm ERR! syscall mkdir

npm ERR! Error: EACCES: permission denied, mkdir ‘/home/jy/.npm/commander/2.6.0’ npm ERR! at Error (native) npm ERR! { [Error: EACCES: permission denied, mkdir ‘/home/jy/.npm/commander/2.6.0’] npm ERR! errno: -13, npm ERR! code: ‘EACCES’, npm ERR! syscall: ‘mkdir’, npm ERR! path: ‘/home/jy/.npm/commander/2.6.0’, npm ERR! parent: ‘express’ } npm ERR! npm ERR! Please try running this command again as root/Administrator.

npm ERR! Please include the following file with any support request: npm ERR! /home/jy/usor/npm-debug.log

I tried use Root to do it, it gave me error: Error: EACCES: permission denied, open ‘/root/.config/configstore/insight-yo.json’ You don’t have access to this file.

at Error (native) at Object.fs.openSync (fs.js:549:18) at Object.fs.readFileSync (fs.js:397:15) at Object.create.all.get (/usr/local/lib/node_modules/yo/node_modules/configstore/index.js:34:26) at Object.Configstore (/usr/local/lib/node_modules/yo/node_modules/configstore/index.js:27:44) at new Insight (/usr/local/lib/node_modules/yo/node_modules/insight/lib/index.js:37:34) at Object.<anonymous> (/usr/local/lib/node_modules/yo/lib/cli.js:172:11) at Module._compile (module.js:409:26) at Object.Module._extensions…js (module.js:416:10) at Module.load (module.js:343:32) root@ubuntu-1gb-sfo2-01:~/usor# node -v v4.5.0 root@ubuntu-1gb-sfo2-01:~/usor# npm -v 3.10.8

I get the feel it is the access problem, i tried sudo chmod g+rwx /root /root/.config /root/.config/configstore, it says the directory doesn’t exist. What will be the best way to resolve this? Installing NVM? if so, what else do i need to do?