Module not found: Can't resolve 'react-router-dom' in 'C:\Users\Diego\Desktop\react-travel-website\src' code example

Example 1: Module not found: Can't resolve 'react-router-dom'

npm install react-router-dom --save

Example 2: Module not found: Can't resolve 'react-router-dom' in '/home/sandesh/Documents/Projects/DigitalFlow/client/src'

npm install --save react-router-dom