I trust you,
thats is better to reinstall, but i CANT stop my company for a complete reinstallation of the central server, you understand?
so i need to upgrade without reinstall.
is dangerous in your advice?
i tryed it out. but it doesn't work very well.
First i just did apt-get dist-upgrade nothing happend, so i downloaded the fedora-releas (the fc2 one) and installed it. Afther that i tryed apt-get again, and nothing. Als yum din't work.
So i looked for the conf file of apt-get and i editet it so it get's the fc2. And afther the edit i did apt-get update and then apt-get dist-upgrade and it worked. It download the things and installed it. Although i got FC2 now it seems some things whent wrong, when i logon in X it gives a error (althoug error apears the X works normaly). And also FC2 coulden't detect my sound card now.
So it looks like it worked i can use FC2 normaly. I haven't found anything that don't work. And i bet that afther 18 it's much easyer to update and upgrade. Als maybe afther 18 when you use yum to upgrade small errors could be gone.
I aint a expert in linux but if i was about to upgrade a company server i would do clean install. Upgrading looks easy and cost's less time but if it goes wrong it can cost you ewen more time.