On Mon, Apr 24, 2017 at 9:10 AM, Adam Borowski <kilob...@angband.pl> wrote: > > All of this is caused by Red Hat having no support for upgrades: > > https://access.redhat.com/solutions/21964 > > # Red Hat does not support in-place upgrades between major versions 4, 5 and > # 6 of Red Hat Enterprise Linux. (A major version is denoted by a whole > # number version change. For example, Red Hat Enterprise Linux 5 and Red > # Hat Enterprise Linux 6 are both major versions of Red Hat Enterprise > # Linux). > # > # In-place upgrades across major releases do not preserve all system > # settings, services or custom configurations. Consequently, Red Hat > # strongly recommends fresh installations when upgrading from one major > # version to another. > > # Red Hat currently supports only upgrades from Red Hat Enterprise Linux 6 > # to Red Hat Enterprise Linux 7 for specific/targeted use cases only. > > On the other hand, being able to effortlessly dist-upgrade is one of biggest > reasons many of us have chosen Debian.
The reason that you can't dist-upgrade RHEL is that there's too large a gap between releases. Let's look at the release dates and compare like with like. RHEL 6: November 2010 RHEL 7: June 2014 Debian 6 (squeeze): February 2011 Debian 7 (wheezy): May 2013 Debian 8 (jessie): April 2015 You can't dist-upgrade RHEL from 6 to 7 and you can't dist-upgrade Debian from 6 to 8 in one leap.
