Red Hat Linux 9.0 is an open source operating system and is free to download; the 2003 final release images of Red Hat Linux 9.0 are available on Softpedia.com and Archive.org. Support for this line of Linux was dropped by Red Hat in 2004.
Red Hat dropped support for Red Hat Linux 9.0 in 2004, instead continuing to develop Red Hat Enterprise Linux. As of 2015, Red Hat Enterprise Linux is still developed by Red Hat, but carries relatively restrictive licensing options.
Fedora Linux, a free and open source Linux distribution, is a good choice for non-commercial desktop users who are used to Red Hat Linux. Fedora Linux is sponsored by Red Hat, and is perhaps the closest free, modern equivalent to Red Hat Linux 9.0.