I found my
npm version is 1.4.28.
yo version is 1.3.3
node is v0.10.34
so i tried to upgrade my npm by:
I got this error:
so I delete this file "npm-README.1" and rerun the update command. The error doesn't really change because it mention another file is exist.
above solution will delete all npm related files except:
you should manually delete this and you will have no problem after that.