Ihave downladed ubuntu86x64 (Linux version2.6.32-24-generic) from ubuntu site and installed it on my windows vista X64 laptop.
I'm trying to install oracle 10gr2 on ubuntu 86x64.
First of all I don't want to go with ./runInstaller -ignoreSysPrereqs
/opt/oracle/database/install/oraparam.ini could be fixed some how...
Because it is lot easier to fix the errors before installation rather than after installation.

Also if there is any solution for error

Enterprise Manager configuration failed due to the following error....
Invalid value null for parameter PORT

Have you installed Oracle step by step or missed any configuration.Just follow the steps from below,

http://littlebrain.org/2008/05/12/ho...ubuntu-64-bit/