Apt-Cacher-ng is a software package that keeps a cache, on the disk, of Debian/Ubuntu Packages and Release files.When an apt-get like client issues a request for a file, Apt-Cacher intercepts it and if the file is already cached it serves it to the client immediately, otherwise it fetches the file from the Internet, saves it on the cache, and then serves it to the client. This means that several Debian machines can be upgraded but each package need to be downloaded only once.
This simple tutorial goes through all the basics of using K3b on Linux. K3b is one of the best graphical burning programs on Linux, and also one of the best know in the Linux community. However, it's existence is somewhat of a mystery among new users. Hence this tutorial is here to both introduce this excellent program, and familiarize you with everything you need to know to begin using it. It won't cover every nut and bolt the program has, because there's a lot of them, but it will cover the most important. So, without further adieu, on to the program.