If you got Oracle 9i on a CD then mount it:
mount -r -o loop=/dev/loop0 ora9id1.iso Disk1/
Otherwise download it from http://www.oracle.com/technology/software/products/oracle9i/htdocs/linuxsoft.html.
Extract all three files:
gunzip ship_9204_linux_disk1.cpio.gz
cpio -idmv -I ship_9204_linux_disk1.cpio
Don't forget the -I option or you will get errors during the extraction.
This command will expand the cpio archive to the Disk1 directory. Repeat the process for the other two archives.