Getting npm: command not found. How do I reinstall NPM when Node is already installed? Where did NPM go?

1. If you have a working node, you can re-install npm

curl -L https://npmjs.org/install.sh | sudo sh

2. Unfortunately npm update -g does not do what anybody expects. Fixing this is on the npm roadmap, but it's going to take a while.

3. You almost never need to install a package globally, unless (like generator-angular or grunt-cli) you want to use that package as a command.

Just in case you've done this with brew, I recommend this article on github. Will save you a lot of time.

https://gist.github.com/DanHerbert/9520689

Fixing npm On Mac OS X for Homebrew UsersRun the following commands to remove all existing global npm modules, uninstall node & npm, re-install node with the right defaults, install npm as its own pacakge, and configure the location for global npm modules to be installed.

rm -rf /usr/local/lib/node_modulesbrew uninstall nodebrew install node --without-npmecho prefix=~/.node >> ~/.npmrccurl -L https://www.npmjs.com/install.sh | sh

Node and npm should be correctly installed at this point. The final step is to add ~/.node/bin to your PATH so commands you install globally are usable. I added this line to my ~/.path script, which gets run via ~/.bash_profile. Run the following line as is.

export PATH="$HOME/.node/bin:$PATH"

I met the exactly same problem after execute command to install the npm with latest version on redhat 7.1:

    npm install npm@latest -g

after some tries i found the solution:

    yum reinstall npm

I hope this could help redhat/centos users.