How to reinstall npm with a node version manager? I am getting permission errors with the current version of npm.

If you are get directory and file permission error when using the "npm install" command, you should follow this tutorial to reinstall "node" and "npm" with the "nvm" Node Version Manager.

1. Check the current version of "node" and "npm":

$ node -v
v8.10.0

$ npm -v
6.9.0

2. Download nvm install script and run it:

$ curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.34.0/install.sh > install.sh
$ chmod 700 install.sh
$ sudo ./install.sh

3. Load nvm.sh as nvm command:

$ export NVM_DIR="$HOME/.nvm"
$ [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
$ [ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion" 

$ nvm --version
0.34.0

4. Reinstall "node", including "npm", with "nvm":

$ nvm install node

Downloading and installing node v11.14.0...
Downloading https://nodejs.org/dist/v11.14.0/node-v11.14.0-linux-x64.tar.xz...
######################################################################### 100.0%
Computing checksum with sha256sum
Checksums matched!

Now using node v11.14.0 (npm v6.7.0)
Creating default alias: default -> node (-> v11.14.0)

4. Check the version of "node" and "npm" again:

$ node -v
v11.14.0

$ npm -v
6.7.0

⇒ Reinstall Node.js Required Modules

⇐ Setup Node.js for WYFA Tests

⇑ WYFA (Writing Your First Application)

⇑⇑ Hyperledger Tutorials