howto upgrade from 9.04 to 9.10 (and newer) today (june 2011)

[Gilles MISSONNIER]

hi !
I should have done this a while ago but... here I am now, seems like
that 9.04 is so old that it can't even upgrade itself...

update-manager -c
says that 10.04.2 LTS is available,
but it can't get it...

could I just change the "jaunty" by "karmic"
in the /etc/apt/sources.list ?

or something in /etc/update-manager/release-upgrades

I cannot just give a try, because it is data processing machine, heavily 
used, so I rather

thank's for any advice.
-- 

_-¯-_-¯-_-¯-_-¯-_
Gilles Missonnier
IAP - gimi at iap.fr
01 44 32 81 36