Appendix II) Find out what is your Ubuntu Version
1) Choose one of the below methods
A) System > Administration > System Monitor
B) Open a terminal window > type “more /etc/apt/sources.list | grep Ubuntu”
C) way cooler versions here.
2) Understanding the crazy names!
Sometimes people refer to Ubuntu (and other Linux distributions) by their number-code and other times by code-name, here’s a quick reference list:
- Ubuntu 4.10 (Warty Warthog)
- Ubuntu 5.04 (Hoary Hedgehog)
- Ubuntu 5.10 (Breezy Badger)
- Ubuntu 6.06 LTS (Dapper Drake)
- Ubuntu 6.10 (Edgy Eft)
- Ubuntu 7.04 (Feisty Fawn)
- Ubuntu 7.10 (Gutsy Gibbon)
- Ubuntu 8.04 LTS (Hardy Heron)
- Ubuntu 8.10 (Intrepid Ibex)
- Ubuntu 9.04 (Jaunty Jackalope)
- Ubuntu 9.10 (Karmic Koala)
- Ubuntu 10.04 LTS (Lucid Lynx)
- Ubuntu 10.10 (Maverick Meerkat)
- Ubuntu 11.04 (Natty Narwhal) (still beta as we write)
aalemanha
PedroLopes
Moving towards linux..! 
To know if the installed Ubuntu is of 32 or 64 bits:
uname -m
If it shows i686 or i386 it means 32 bits.
If it shows x86_64 it means 64 bits.
If the CPU is of 32 bits Ubuntu must be of 32 bits.
If the CPU is of 64 bits it can work in 64 or 32 bits. So we can choose: Ubuntu can be of 32 bits or of 64 bits.
To know if the CPU is of 32 or 64 bits:
a) grep -w lm /proc/cpuinfo
If we see lm in red is of 64 bits. Otherwise is of 32 bits.
b) sudo lshw | grep “description: CPU” -A 12 | grep width
It says clearly what we want to know.
Another way to know if the installed Ubuntu is of 32 or 64 bits:
getconf LONG_BIT
In the command …
sudo lshw | grep “description: CPU” -A 12 | grep width
… the quotation marks have to be vertical so it works.
Probably they have been converted again in typographic ones. I hope they appear well now (I’m using the HTML code for them: ampersand number sign 34 semicolon):
sudo lshw | grep "description: CPU" -A 12 | grep width