Install, Run Penumbra Collection, Ubuntu Hardy Heron 8.04.1, HP Pavilion laptop

[helmcken]

Still need help, please! Frictional Games' Support responded with this:

The problems you have with launching the game from the start menu is due to an error in the installation file, which is being worked on. To get the games to launch correctly you can do the following:


I am attaching the screenshot (also retyped here, in case the attached screenshot is too small to see) with the terminal's output after trying their suggestion to enter this command: ~/PenumbraCollection/Overture/penumbra

heathcliff@heathcliff-laptop:~$ ~/PenumbraCollection/Overture/penumbra
Segmentation fault
Penumbra: Overture exited unexpectedly, please check
/home/heathcliff/.frictionalgames/Penumbra/Overture/hpl.log
for any error messages
Also try running
ulimit -c unlimited
And re-running Penumbra and try and recreate the error
then submit the generated core file or stack trace
heathcliff@heathcliff-laptop:~$

When I did that, the whole screen "blinked" again.
What is the computer asking me to do in the ulimit line, please?

I tried again to find a folder called hpl.log. Search says it does not exist. Tried to find a folder called .frictionalgames but it does not exist either. Now, I know where my home folder is.(Attached screenshot also displays contents of my open home folder.) The only folders in it are: desktop, documents, examples, music, pictures, public, templates, videos, the gear-shaped icon labelled AdobeFlash10,test, a solid-black page icon labelled brasero-session.log and the folder PenumbraCollection (containing 13,990 items, totalling 2.1GB - which sounds about right).
What next, please?