From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1S1Gqb-0007jP-Mb for garchives@archives.gentoo.org; Sat, 25 Feb 2012 12:35:34 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id BD490E0B11; Sat, 25 Feb 2012 12:35:10 +0000 (UTC) Received: from mail-pz0-f53.google.com (mail-pz0-f53.google.com [209.85.210.53]) by pigeon.gentoo.org (Postfix) with ESMTP id 1A4A8E0AB2 for ; Sat, 25 Feb 2012 12:33:26 +0000 (UTC) Received: by dady25 with SMTP id y25so4182231dad.40 for ; Sat, 25 Feb 2012 04:33:26 -0800 (PST) Received-SPF: pass (google.com: domain of nileshgce@gmail.com designates 10.68.227.105 as permitted sender) client-ip=10.68.227.105; Authentication-Results: mr.google.com; spf=pass (google.com: domain of nileshgce@gmail.com designates 10.68.227.105 as permitted sender) smtp.mail=nileshgce@gmail.com Received: from mr.google.com ([10.68.227.105]) by 10.68.227.105 with SMTP id rz9mr18008007pbc.98.1330173206536 (num_hops = 1); Sat, 25 Feb 2012 04:33:26 -0800 (PST) Received: by 10.68.227.105 with SMTP id rz9mr15028658pbc.98.1330173206477; Sat, 25 Feb 2012 04:33:26 -0800 (PST) Received: from [192.168.2.3] ([121.246.205.20]) by mx.google.com with ESMTPS id q8sm7120156pbi.1.2012.02.25.04.33.24 (version=SSLv3 cipher=OTHER); Sat, 25 Feb 2012 04:33:25 -0800 (PST) Message-ID: <4F48D510.9010803@nileshgr.com> Date: Sat, 25 Feb 2012 18:03:20 +0530 From: Nilesh Govindrajan User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120215 Thunderbird/10.0.1 Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Re: Safe way to test a new kernel? References: <201202251218.59928.michaelkintzios@gmail.com> In-Reply-To: <201202251218.59928.michaelkintzios@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Archives-Salt: 4284e38b-acb9-4544-b472-789093818191 X-Archives-Hash: 31146eb699a3fd54ddad96a739d104b0 On Sat 25 Feb 2012 05:48:49 PM IST, Mick wrote: > On Saturday 25 Feb 2012 02:32:49 Pandu Poluan wrote: >> On Feb 25, 2012 9:14 AM, "Grant" wrote: >>>>> I need to test a kernel config change on a remote system. Is there a >>>>> safe way to do this? The fallback thing in grub has never worked for >>>>> me. When does that ever work? >>>> >>>> You can press ESC in the Grub screen and it will take you to text-only >> >> mode. >> >>>> There, you select an entry, press "e" and edit it. Press ENTER when >> >> you're >> >>>> finished, and then press "b" to boot your modified entry. >>>> >>>> That way, you can boot whatever kernel you want if the current one >> >> doesn't >> >>>> work. >>> >>> I can't do that remotely though. I'm probably asking for something >>> that doesn't exist. >>> >>> - Grant >> >> Situations like these that made me decide with great conviction to always >> deploy my servers virtualized, even if the box in question will only host a >> single VM. >> >> Now, if I lost my intelligence for a couple of seconds and somehow ended up >> with a VM that's no longer accessible remotely, I just connect to the >> virtual console. >> >> The flip side? Now I'm getting too daring/careless, and the uptime now >> drops below my (self-imposed) target of 99.99% :-P > > What do you do when you need to upgrade the host, rather than the guest? > I think setting up a VM on the server using the new kernel should help test a new kernel? -- Nilesh Govindarajan http://nileshgr.com