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Redhat 9 is an extremely old, outdated distribution. It was released about 6 years ago, and support was stopped 5 years ago. Therefore, any modern hardware is unlikely to be supported.
I would strongly recommend getting a newer, supported distro. The modern successor to Redhat Linux is the Fedora Project (which is currently on version 10 - so RH9 is 11 releases behind). Alternatively, you could look at different distros such as Ubuntu.