From time to time you will want to know what processor you are running. Maybe you've just bought a new computer or working on a friends and no one has a clue what the processor is inside. An easy terminal command will give you the info.
Open up a terminal by going to Applications > Accessories > Terminal and type:
This will tell you if you have a 32 bit system or 64 bit system. If it says i686 then you have a 32 bit, if it says x86_64 then you've got a 64 bit. You can also find out a little more info like the kernel you are using by typing in:
Another simple terminal command I like to use which gives basic version info of the release you have. try this...
You will get some output like this:
Distributor ID: Ubuntu
Description: Ubuntu 10.10
Hope it helps!