How do I check my whether my Ubuntu is 32-bit or 64-bit and whether or not it is using full RAM? I'm concerned that because my system is 32-bit it isn't using the maximum OS-supported RAM. It says my PC has 8GB RAM, but how do I verify it is using or detecting this as 8GB RAM?
Regarding Sotanaht's answer: the System Tab shows
Release 11.04 (natty), Kernel linux 2.6.38-11-generic-pae, Gnome 2.32.1 .
After finding my answer. Because I have 8GB hardware RAM, I don't want to be restricted to 4GB RAM, therefore removing my 32-bit Ubuntu 11.04, and downloading 64-bit Ubuntu 11.04 (so that my applications can utilize full hardware RAM too, specially for 3D animation rendering, image processing, video editing)