mattias wrote: > On Fri, 2010-04-02 at 14:50 -0400, Kwan Lowe wrote: >> On Fri, Apr 2, 2010 at 2:46 PM, mattias <mj at mjw.se> wrote: >> > i maybe asked the question litle wrong >> > i meen >> > i have centos 5.0 now >> > but can i downgrade to e.g let's say 2.0? >> >> No, won't work. >> >> You can, as someone suggested, back up your files and re-install but >> there's very little chance application data and files will be >> compatible. > hmm ok but i can upgrade to 5.3? > how can i upgrade to 5.3 but not downgrade to 2.0? May I strongly suggest that you read up on computers and operating systems? You don't seem to understand what you're asking - it's like asking if, from Windows Vista, you can downgrade to NT 4, and expect anything but text files to be workable. A subrelease upgrade or downgrade is not that scary - they've been tested a lot, and that's just yum upgrade. But when a new full release comes out - like 4, or 5, or 6, you *really* want to back everything up and do a fresh install; otherwise, there's too many incompatibilities (such as, say, python 2.x.x and 2.y.x), and you're asking for problems. mark