Dear

How i can know the ( RAM and CPU ) on unix. we use AIX operating system.

This is for security purposes.

Try prtconf

That would be easiest, or if you're more masochistic, just do an "lsattr -El sys0", or "lscfg -vp"...heh.

I think you will find the lscfg -vp will show all the memory in the system, not just the LPAR, so beware!

on AIX 5L you can use lparstat -i, even if it's a standalone system
not sure if it works on AIX 5.1 and 5.2

i prefer lsconf

All the above commands are useful. Let me add a few more,

Memory (RAM) on the system : bootinfo -r
CPU on the system : lsdev -Ccprocessor

Regds, Kaps