redhat9的下载地址。（请复制以下链接，用迅雷等下载工具进行下载！）
http://ftp.azc.uam.mx/mirrors/redhat/linux/9/en/iso/i386/shrike-i386-disc1.iso
http://ftp.azc.uam.mx/mirrors/redhat/linux/9/en/iso/i386/shrike-i386-disc2.iso
http://ftp.azc.uam.mx/mirrors/redhat/linux/9/en/iso/i386/shrike-i386-disc3.iso