The Wayback Machine is an archive of the web, which is to say that it crawls the Internet looking for websites and then saves them. It might seem like a simple thing but it is also very important. A lot of the Web disappears fairly often, especially with news sites. Every time they update their site the links break and they only way to find what that person said is through the Wayback Machine. Donate, they are worth it.
One of the problems with the Wayback Machine though is that it is slow, very slow, and sometimes it would be good to have a copy of the website on your computer just to make things faster or to provide a backup. This turns out to be easy on KDE neon. You can use Wayback Machine Downloader, a Ruby Gem.
To install it, first check you have Ruby installed on your machine by looking at the output of ruby -v in Konsole.
If you have Ruby installed (and you should already have on KDE neon) then you can simply enter,
gem install wayback_machine_downloader
It is really that simple. After that the basic usage is,
and it will by default download it all to a directory in your home folder. There are lots of additional options you can use, such as specifying the time or the download directory and you can find those here.