Hi,
in the /etc/security/limits file set "fsize=-1" for every OS user that might use oracle (exp, imp, loader etc.) including the user oracle.

If tempfiles grow up to certain limit, I set them offline, create new small tempfiles and drop the old ones. Then, if I'd simply delete old tempfiles with the rm command, filesystem would not get the free space back, as some oracle processes still hold the tempfile handles. The workaround is "echo 0 > tempfile" which resizes the tempfile to 2 bytes and returns space back to filesystem, and then "rm tempfile".

I don't know any other differences than noticed in installation manual.

Regards