John Piwowar recently covered EBS R12 Vision installation steps on Linux at oraclenerd
This is four part series -Part 1 here covers introduction, recommendation and software location, Part 2 here covers installation (bonus troubleshooting steps)
Part 3 here covers Start-up and Shutdown and finally Part 4 here covers accessing oracle apps (self service and forms).
Interesting part is companion posts at John’s blog here , here , here and here (must read if you are new to apps).
For further reading on Oracle Apps R12 installation on Windows click here for multi-node installation click here and for installation issues and log file click here