update npm linux code example

Example 1: update npm

npm install -g npm@latest

Example 2: upgrade npm

npm i -g npm-upgrade

Example 3: npm inatall latest version ubuntu

// update latest version NPM
sudo npm install -g npm@latest

//update to next version NPM
sudo npm install -g npm@next

Example 4: update npm

npm install -g npm@latest 
// for global install