ubuntu 22.04 install latest node JS and npm , and how to remove them, and how to install ng (angular CLI)

 Remove nodeJS and npm :

https://stackoverflow.com/questions/32426601/how-can-i-completely-uninstall-nodejs-npm-and-node-in-ubuntu

sudo apt-get remove nodejs
sudo apt-get remove npm

Install latest npm : (recommneded using nvm - node version management)

https://www.digitalocean.com/community/tutorials/how-to-install-node-js-on-ubuntu-22-04

#Install node using nvm will also autmotically install npm

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh
Take a look and make sure you are comfortable with the changes it is making. When you are satisfied, run the command again with | bash appended at the end. The URL you use will change depending on the latest version of nvm, but as of right now, the script can be downloaded and executed by typing:
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
This will install the nvm script to your user account. To use it, you must first source your .bashrc file:
source ~/.bashrc

// Install version v16.4.0

nvm install v16.14.0

# Install angular CLI

https://stackoverflow.com/questions/37227794/ng-command-not-found-while-creating-new-project-using-angular-cli

must install by npm or else ng command will not be found

# install angular cli according to your package.json version

npm install -g @angular/cli

Install a specific version
https://stackoverflow.com/questions/43344600/how-to-install-a-specific-version-of-angular-with-angular-cli
npm uninstall -g angular-cli
npm cache clean
npm install -g @angular/cli@12.2.13