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 1S1DTE-0002Kk-M9 for garchives@archives.gentoo.org; Sat, 25 Feb 2012 08:59:13 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id E2FC3E0CA8; Sat, 25 Feb 2012 08:58:57 +0000 (UTC) Received: from mail-ey0-f181.google.com (mail-ey0-f181.google.com [209.85.215.181]) by pigeon.gentoo.org (Postfix) with ESMTP id DC4B5E0CA8 for ; Sat, 25 Feb 2012 08:57:54 +0000 (UTC) Received: by eaak14 with SMTP id k14so1240392eaa.40 for ; Sat, 25 Feb 2012 00:57:54 -0800 (PST) Received-SPF: pass (google.com: domain of robert.david.public@gmail.com designates 10.213.33.142 as permitted sender) client-ip=10.213.33.142; Authentication-Results: mr.google.com; spf=pass (google.com: domain of robert.david.public@gmail.com designates 10.213.33.142 as permitted sender) smtp.mail=robert.david.public@gmail.com; dkim=pass header.i=robert.david.public@gmail.com Received: from mr.google.com ([10.213.33.142]) by 10.213.33.142 with SMTP id h14mr1709852ebd.43.1330160274193 (num_hops = 1); Sat, 25 Feb 2012 00:57:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:in-reply-to:references:x-mailer :mime-version:content-type:content-transfer-encoding; bh=WjpV4hB+rVEa8829TqNjxJD5uZ7GLqJ0cPEV02dZNSg=; b=uXA4c+toI2RQxA9FRMRPK37nD0+Xm8/jWRpRCOSJgixRz2mBgtgSRsqP4dHcQTD4si Qwm5bwm4RUzHv9k2u6KnjDPe+FJ72rZBV8RzN+epkMWcIUI5xBDARx/FWb0s7rGUXKfa YBV3wfPRC2TOK+D5Bf5v9kOXFqgwwxSTc/n5I= Received: by 10.213.33.142 with SMTP id h14mr1300287ebd.43.1330160274062; Sat, 25 Feb 2012 00:57:54 -0800 (PST) Received: from localhost (gate.chabry.cz. [80.92.246.13]) by mx.google.com with ESMTPS id w60sm28816300eeb.4.2012.02.25.00.57.52 (version=SSLv3 cipher=OTHER); Sat, 25 Feb 2012 00:57:53 -0800 (PST) Date: Sat, 25 Feb 2012 09:57:51 +0100 From: Robert David To: gentoo-user@lists.gentoo.org Cc: emailgrant@gmail.com Subject: Re: [gentoo-user] Re: Safe way to test a new kernel? Message-ID: <20120225095751.7ad3d9d6@gmail.com> In-Reply-To: References: X-Mailer: Claws Mail 3.7.10 (GTK+ 2.24.8; x86_64-pc-linux-gnu) 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 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Archives-Salt: 0bc07dd7-af77-490b-a020-1e809dcb715b X-Archives-Hash: 47c636e7cabe14d89f2808655d617a6e V Fri, 24 Feb 2012 18:08:43 -0800 Grant naps=C3=A1no: > >> I need to test a kernel config change on a remote system. =C2=A0Is > >> there a safe way to do this? =C2=A0The fallback thing in grub has never > >> worked for me. =C2=A0When 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. > > =C2=A0Press 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. >=20 > I can't do that remotely though. I'm probably asking for something > that doesn't exist. >=20 > - Grant >=20 Don't do that if you don't have some tool like KVM, or other remote management of the server. Or if it is available in the data center, just call them and order this service for the time you need to do updates. This is why I don't use gentoo on servers any more, just because I rather stay safe than sorry. But if you really need to do that (and you don't have any chance to get KVM attached), just create an virtual machine with backup of your server and test that kernel there, and check that you have all the modules you need on the server. But this is the last thing I would do. Good luck, Robert. =20