Can't Install Ember-CLI without sudo - ember.js

Question

npm install -g ember-cli
npm ERR! Error: Attempt to unlock ember-cli, which hasn't been locked
npm ERR! at unlock (/usr/local/lib/node_modules/npm/lib/utils/locker.js:44:11)
npm ERR! at cb (/usr/local/lib/node_modules/npm/lib/cache/add-local.js:30:5)
npm ERR! at /usr/local/lib/node_modules/npm/lib/cache/add-local.js:47:20
npm ERR! at /usr/local/lib/node_modules/npm/lib/utils/locker.js:30:7
npm ERR! at /usr/local/lib/node_modules/npm/node_modules/lockfile/lockfile.js:167:38
npm ERR! at Object.oncomplete (fs.js:107:15)
npm ERR! If you need help, you may report this *entire* log,
npm ERR! including the npm and node versions, at:
npm ERR! <http://github.com/npm/npm/issues>
npm ERR! System Linux 3.2.0-61-generic
npm ERR! command "/usr/local/bin/node" "/usr/local/bin/npm" "install" "-g" "ember-cli"
npm ERR! cwd /home/ahmed
npm ERR! node -v v0.10.31
npm ERR! npm -v 1.4.23
npm ERR!
npm ERR! Additional logging details can be found in:
npm ERR! /home/ahmed/npm-debug.log
npm ERR! not ok code 0
when installing using sudo, then getting problem in creating new app.
sudo npm install -g ember-cli
/usr/local/bin/ember -> /usr/local/lib/node_modules/ember-cli/bin/ember
npm WARN unmet dependency /usr/local/lib/node_modules/npm/node_modules/npm-registry-client/node_modules/couch-login requires request#'~2.9.202' but will load
npm WARN unmet dependency /usr/local/lib/node_modules/npm/node_modules/request,
npm WARN unmet dependency which is version 2.30.0
ember-cli#0.0.44 /usr/local/lib/node_modules/ember-cli
├── abbrev#1.0.5
├── js-string-escape#1.0.0
├── broccoli-writer#0.1.1 (rsvp#3.0.13, quick-temp#0.1.2)
└── yam#0.0.14 (lodash#2.4.1, findup#0.1.5, fs-extra#0.8.1)
ahmed#shivank-Vostro-2420:~$ ember -v
version: 0.0.44
node: 0.10.31
npm: 1.4.26

Answer 1

First of all remove node completely
$ rm -rf ~/.npm ~/.nvm
Use NVM to manage node version...
$ curl https://raw.githubusercontent.com/creationix/nvm/v0.17.1/install.sh | bash
$ source ~/.nvm/nvm.sh
//add this line to my ~/.bashrc, ~/.profile, or ~/.zshrc
Adding source in profile using nano:
$ nano ~/.profile
Go to bottom of the file and add this line:
source ~/.nvm/nvm.sh
Then hit CTR+X and press Y to save
same for others...
Use stable version of node
$ nvm install 0.10.32
$ nvm use 0.10.32
$ nvm alias default 0.10.32
Once you’ve installed Node, you’ll need to install the Ember CLI globally with:
$ npm install -g ember-cli
This will give you access to the ember command-line runner.
You’ll need to install Bower, a package manager that keeps your front-end dependencies (including JQuery, Ember, and QUnit) up to date. This is as easy as running:
$ npm install -g bower
This will give you access to the bower command-line runner.
Now you can run enberCLI commands.
Cheers.