>> Hello Group, >> >> I am installed some application running on top of Centos 5.2 OS and these >> applications are running fine. However, we are thinking of upgrading our >> 5.2 Centos to 5.7 (hot upgrade). That is we want to upgrade from 5.2 Centos >> to 5.7 Centos and not disturb the applications. >> >> Is it possible? Could someone please help. > > It is rare for a 'yum update' to disturb already working applications. > It is possible of course, but the point of 'enterprise' distributions > is that a lot of care is taken to not break things (i.e. make changes > that aren't backwards compatible) within a major release version. > > Not sure if it is necessary but there were some quirks in the updates > along the way that might make it a good idea to: > > yum update glibc\* rpm\* yum\* python\* > before doing a full 'yum update'. I might suggest a yum clean all before the above command. I've seen a 5.0 yum update to a 5.6 without issue, but there was very little on the server.