I'm a new I.T. guy in my company, and while I was checking the servers, I found that, to my surprise, the server is using a 32-bit version of Ubuntu, but is using almost all of the installed 8GB of RAM.
I remember from my "Computer Architecture" classes that only 64-bit operating systems can use more than 4GB of RAM.
The question that follows is: Will it be able to use 16GB of RAM if I were to upgrade it?
(I can't test, because this is the core production server)
uname -a: Linux bachue 3.8.0-19-generic #29-Ubuntu SMP Wed Apr 17 18:19:42 UTC 2013 i686 athlon i686 GNU/Linux