upgrade?

[chuck lawrence]

I must be missing something...

I want to upgrade es3 to es4, or centos4.2 to centos4.4.  I have almost 
no config invested in either box (apps and user dirs come from nfs), so 
a clean install is a viable option.  indeed, it's what I've always done.

but I could upgrade instead, right?  the first prompt says something 
about "install or upgrade".

o  can I upgrade while the os is running, as I can do with a kernel?

o  can I upgrade by booting from install media?

o  is there any difference between upgrading like this and just keeping
    packages up2date and then updating the kernel?

adv(thanks)ance

-chuck
-- 

  * ------------------- * ----------------------------*
  | charles e. lawrence | lawrence berkeley nat'l lab |
  | celawrence at lbl.gov  | #1 cyclotron rd  ms 50a6134 |
  | (510) 486-4682      | berkeley  ca  94720         |
  * ------------------- * ----------------------------*

              www-eng.lbl.gov/~celawrence