NPM cannot install dependencies - Attempt to unlock something which hasn't been locked

Question

I\'ve been trying to run an npm install on my package.json file, but I\'m having a lot of trouble. It keeps saying \"Error: Attempt to unlock XXX, which hasn\'t been locke

Answer 1

None of this worked for me. I had to run literally as root by doing the following:

sudo su -
sudo npm install forever -g

Then the package installed on Linux Ubuntu 14.04.