source upgrade FBSD10 -> 11 (then 12)

Bob Bishop rb at
Thu Feb 28 16:56:01 UTC 2019


> On 28 Feb 2019, at 16:18, Lee Damon <nomad at> wrote:
> I have three old FBSD 10 boxes that I need to upgrade. Ordinarily I do this by building a new box with the latest OS then migrating services and data. Unfortunately I don't have that option this time, the upgrade has to happen in-place. My plan is to go from 10 to 11 then from 11 to 12.
> I was looking at the "Upgrading FreeBSD" part of but unfortunately it seems to be missing a critical URL or two:
> "The procedure for doing a source code based update is described in and ."
> I tracked down where I think it points and the instructions appear to be just for same-version updates. Can I safely move /usr/src out of the way then check out the stable/11 and compile/install it or are there other things I need to do?

See the Handbook section 23.5:

> thanks,
> nomad

Bob Bishop
rb at

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