Companies turn to Linux today when they want to build new technology for the same reason that web developers turned to the operating system in the 1990s: they can customize it to meet their needs, and then share (or sell) the results without having to get permission.
What is Linux used for today?
Today, Linux systems are used throughout computing, from embedded systems to virtually all supercomputers, and have secured a place in server installations such as the popular LAMP application stack. Use of Linux distributions in home and enterprise desktops has been growing.
Why is Linux important?
Linux helps you to use or utilize your old and outdated computer systems as a firewall, router, backup server or file server and many more. There are many distributions available to use according to your system capability. As you can use Puppy Linux for low- end systems.