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Date:      Fri, 16 Dec 2016 12:22:42 -0500
From:      Allan Jude <allanjude@freebsd.org>
To:        freebsd-doc@freebsd.org
Subject:   Re: [Bug 215344] Kernel problems
Message-ID:  <b93e5cf1-7fb7-8276-492f-93d1077f51df@freebsd.org>
In-Reply-To: <bug-215344-9@https.bugs.freebsd.org/bugzilla/>
References:  <bug-215344-9@https.bugs.freebsd.org/bugzilla/>

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From: Allan Jude <allanjude@freebsd.org>
To: freebsd-doc@freebsd.org
Message-ID: <b93e5cf1-7fb7-8276-492f-93d1077f51df@freebsd.org>
Subject: Re: [Bug 215344] Kernel problems
References: <bug-215344-9@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-215344-9@https.bugs.freebsd.org/bugzilla/>

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On 2016-12-16 12:12, bugzilla-noreply@freebsd.org wrote:
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D215344
>=20
>             Bug ID: 215344
>            Summary: Kernel problems
>            Product: Documentation
>            Version: Latest
>           Hardware: Any
>                 OS: Any
>             Status: New
>           Severity: Affects Only Me
>           Priority: ---
>          Component: Documentation
>           Assignee: freebsd-doc@FreeBSD.org
>           Reporter: tschweikle@gmail.com
>=20
> https://www.freebsd.org/doc/handbook/kernelconfig-trouble.html
>=20
> Tells how to replace a kernel with an older one. But it does not descri=
be hot
> to boot an older kernel it the newer on does not work or crashes.
>=20
> It is a bad mistake to think you'll have a running system in front of y=
ou. You
> might have a crashing system in front of you and you are forced to boot=
 an old
> kernel. It should describe how to do this.
>=20
> After you managed to boot you crashing system agein, you'll be able to =
replace
> the new, crashing kernel with an old one.
>=20

The beastie loader menu has a menu option to load kernel.old

Otherwise, drop to the loader prompt, and type:
unload
load /boot/myoldkernel/kernel
boot


--=20
Allan Jude


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