sudo npm install -g @angular/cli errors on ubuntu 14.04

npm ERR! git clone git@github.com:angular/cli Cloning into bare repository '/home/mahmudul/.npm/_git-remotes/git-github-com-angular-cli-515723dd'... npm ERR! git clone git@github.com:angular/cli Warning: Permanently added the

RSA host key for IP address '192.30.255.113' to the list of known hosts. npm ERR! git clone git@github.com:angular/cli Permission denied (publickey). npm ERR! git clone git@github.com:angular/cli fatal: Could not read from remote repository. npm ERR! git clone git@github.com:angular/cli npm ERR! git clone git@github.com:angular/cli Please make sure you have the correct access rights npm ERR! git clone git@github.com:angular/cli and the repository exists. npm ERR! addLocal Could not install angular/cli npm ERR! Error: ENOENT, stat 'angular/cli' npm ERR! If you need help, you may report this log at: npm ERR! http://github.com/isaacs/npm/issues npm ERR! or email it to: npm ERR!

npm ERR! System Linux 3.13.0-24-generic npm ERR! command "/usr/bin/nodejs" "/usr/bin/npm" "install" "-g" "@angular/cli" npm ERR! cwd /home/mahmudul npm ERR! node -v v0.10.25 npm ERR! npm -v 1.3.10 npm ERR! path angular/cli npm ERR! code ENOENT npm ERR! errno 34 npm ERR! npm ERR! Additional logging details can be found in: npm ERR! /home/mahmudul/npm-debug.log npm ERR! not ok code 0

via Md. Mahmudul Islam