William L. Maltby wrote: > Got a wild hair this A.M. and decided to inundate my two brain cells. > "Man yum" includes this: > > update If run without any packages, update will update every > currently installed package. ... > assumed to be a shell glob and any matches are then installed. > > If the --obsoletes flag is present yum will include package > obsoletes in its calculations - this makes it better for distro- > version changes, for example: upgrading from somelinux 8.0 to > somelinux 9. > > Hmmm. Cell number 2 doesn't forget much. I recall several admonitions > that major upgrade should take the form of a new install. E.g. CentOS 3* > to CentOS 4*. The paragraph above *seems* to indicate that a major > upgrade might be doable? Moreover, it prompts the questions: > > 1) "What are the downsides, if any?" > 2) "Has anybody tried it recently?" > 3) "Have any results to report?" > > No pressing need, just curious. > yum will upgrade pkgs, but not all pkgs like that - eg. moving from kernel2.4 to 2.6 the 'centos way' - moving from devfs to udev, major python + rpm upgrade in itself. check list history from early 2005, this move from centos3 -> centos4 was documented and thrashed out a few times. plus, packages change - not everything from el3 made it to el4 - and what about non core installed pkgs and install from source pkgs! -- Karanbir Singh : http://www.karan.org/ : 2522219 at icq