Wget downloads the PDF to the current directory. By default, Wget pulls files from the specific URL and places them in the current working directory. Users can specify a different destination location by using the -P option followed by the folder to store the downloaded file.

index.html is an HTML file that serves as the home page for a website. It's often the first file that visitors to a website will see. Usually, index.html is automatically opened when visitors enter the domain without specifying a specific file. An example of a index.html file might contain the following code: html.

It's used by typing wget followed by the URL of the file you want to download, for example wget [options] http://example.com/file.txt . In this example, we use the wget command to download a file named 'file. txt' from a website 'example.com'. The command fetches the file and saves it in your current directory.