NEW ISSUE

[Redouane]

Hello,
we have three servers with Red Hat enterprise linux 4
and we installed application server 10g R3
after uploading the applications
the server worked for 3 days smoothly
and now when we login to the server as telnet 
after su - (oracle user)
its gave Resource temporarily unavailable
we checked the memory and CPU its running smoothly and no load on it.
i think the problem on oracle user at OS level???

Guys, is there anyway to solve this issue using some useful parameters
for both kernel and xinet....
Regards,
RN