How do I upgrade Ubuntu OS from the CD.

[Chris Jones]

>>> 
>>> I'm sorry, but I have to call FUD on that.  Ubuntu is the most easily
>>> upgraded OS I have ever tried.  In all my upgrades (yes, up/grades/)
>>> from Warty in 2004 it has been seamless and I have never once had to
>>> chase down anything.  Once in a while something will not work properly
>>> if I upgrade right away when a new version is offered, but all problems
>>> have self-resolved with further upgrades.
>> 
>> +1 to that. Never had problems upgrading ubuntu ...
> 
> Oh, I have. Not a broken system but to the level of most panel icons
> missing, the remainder non-working, susbstantial numbers of apps on
> the menu not working, media player plugins and codecs b0rked, and so
> on.
> 
> Saying that, 9.10 -> 10.04 was the most trouble-free I've ever done.

Ah yes, the OP doesn't actually say how old their 'old' ubuntu version is. I kinda implicitly assumed it was 9.10..., but that could well be wrong. 

I agree, if the jump in versions is large, the probability of problems is much much larger...

Chris