Thank you Terran.But I have not install oracle on my 2k.so........
how do you think about What's wrong with my system?Do you think my installation is successfully?　　　　　　

  Don't need edit sqlnet.ora,listener.ora,tnsnames.ora ,I use it at default setting.
  Setup again(including redhat system),check the rpm version carefully,and u'll be successfully.Good Luck!　　　　　　

Now I'm reinstalling oracle.But I don't want to reinstall RH again.Hope successfully this time.
And my chinese input method is out of work,display:input method inavalid,input server actived.　　　　　　

Oracle文档说ORA-03113的错误不是Oracle本身的，要你检查你的网络设置，我第一次装9i时也出现过，后来我是改了那三个文件（从Windows下复制过来的）后就可以启动了！　　　　　　

yeah.I have seen the ORACLE ERROR MESSAGE too.At the beginning of the installation every time,there are always several error  messages:thrown when the IP of the host not determined.I use dhcp on my eth,maybe this is the reason.What shall I do?　　　　　　

将你的机器设为固定IP试试.　　　　　　

Yeah.I think I have found the reason.it must need a detemined IP address.It seems I have to buy an another net adaptor.　　　　　　

aahaha.Terran and smallerfish,I have succeeded to install oracle 9i,when I bind another determined ip to my dhcp adaptor.Thank you for your help.

　　　　　　

我在solaris8上安装过，碰到过这种问题，当时解决办法就是查看oracle提供的安装文档，修改操作系统的内存配置。比如semmls等，具体还是看看文档吧。(oracle网站上有）