This information will be useful in finding out the particular rpm that you have to download when the rpms made for all architectures are available from public repos like rpmind.net , rpm.pbone.net etc
Run the following command
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uname -m
or
/bin/arch
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The following procedure may help find a device identifier or device file for a newly added hardware device in GNU/Linux . In the example I am connecting a USB pendrive
You can find the details from the Linux kernel log
hnlinux:~ # tail -f /var/log/messages
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May 2 01:38:24 hnlinux kernel: usb 1-7: new high speed USB device [...]