Cannot install NodeJs: /usr/bin/env: node: No such file or directory

I'm trying to install nodeJs into my Ubuntu 14.04 in order to use GruntJs. I've read about [Ubuntu different way][1] of doing it ([issues?][2]), so this is what I've done in order to install it: sudo apt-get install npm sudo npm install -g grunt-cli Typing grunt after that I've got the error: /usr/bin/env: node: No such file or directory So, I've tried: curl -sL https://deb.nodesource.com/setup | sudo bash - sudo apt-get install -y nodejs sudo apt-get update And trying again, and still getting the error, I've tried: sudo add-apt-repository https://launchpad.net/~chris-lea/+archive/node.js/ sudo apt-get install -y nodejs I've got this message: nodejs is already the newest version. 0 to upgrade, 0 to newly install, 0 to remove and 3 not to upgrade. I did try a cleanup just in case: sudo apt-get autoremove But nope, the error is still there: when I type grunt I still get `/usr/bin/env: node: No such file or directory` What should I do? [1]: https://github.com/joyent/node/wiki/Installing-Node.js-via-package-manager#debian-and-ubuntu-based-linux-distributions [2]: https://github.com/atom/atom/issues/2241