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 1S1Muo-000674-45 for garchives@archives.gentoo.org; Sat, 25 Feb 2012 19:04:18 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id CF27BE0D47; Sat, 25 Feb 2012 19:04:08 +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 EB37BE0CA1 for ; Sat, 25 Feb 2012 19:03:11 +0000 (UTC) Received: by eaak14 with SMTP id k14so1481232eaa.40 for ; Sat, 25 Feb 2012 11:03:11 -0800 (PST) Received-SPF: pass (google.com: domain of robert.david.public@gmail.com designates 10.14.95.8 as permitted sender) client-ip=10.14.95.8; Authentication-Results: mr.google.com; spf=pass (google.com: domain of robert.david.public@gmail.com designates 10.14.95.8 as permitted sender) smtp.mail=robert.david.public@gmail.com; dkim=pass header.i=robert.david.public@gmail.com Received: from mr.google.com ([10.14.95.8]) by 10.14.95.8 with SMTP id o8mr4310374eef.111.1330196591278 (num_hops = 1); Sat, 25 Feb 2012 11:03:11 -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=ycK9vlvZuKtqAsvNMKU8wGBYIWuOhdxFvTa8IWqw1dA=; b=xrx88Pmcq08MT1mFCccBCz9ElATTQKpyhYSDpIgNijNuPczcl8NpPNQXACICD46PM4 7NjNAhUR9hbg7qlqYaitycVbU74I+PW8mKrCnbs9uajoBDOMpeZEaTFqCFmEN+XaxHSi cUSjZo/qwwLs0eAHn8s+WREmdlC1ZgtYDLgNk= Received: by 10.14.95.8 with SMTP id o8mr3233543eef.111.1330196591199; Sat, 25 Feb 2012 11:03:11 -0800 (PST) Received: from localhost (gate.chabry.cz. [80.92.246.13]) by mx.google.com with ESMTPS id z47sm34873113eeh.9.2012.02.25.11.03.09 (version=SSLv3 cipher=OTHER); Sat, 25 Feb 2012 11:03:10 -0800 (PST) Date: Sat, 25 Feb 2012 20:03:05 +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: <20120225200305.2e9ae382@gmail.com> In-Reply-To: References: <20120225095751.7ad3d9d6@gmail.com> 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: 0f052635-06d9-4dc6-9c8d-bd9df9fbb054 X-Archives-Hash: 7fb3cbfb703140cf990d24410de76519 V Sat, 25 Feb 2012 10:32:20 -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. 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. =C2=A0I'm probably asking for somethi= ng > >> that doesn't exist. > >> > >> - Grant > >> > > > > 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. >=20 > How is another distro different in this situation? >=20 > - Grant Just because when using distros like Centos/RHEL or Debian stable, you have very little chance that the kernel released will fail. Due to extensive testing, user base and update policy. And major kernel update you done only once in few years and the transition is tested before release done (though you are supposed to test yourself to be safe). This is not saying that gentoo is bad, I'm very big fan of gentoo. But you have to concern where it use and where not.=20 Robert. =20 >=20 >=20 > > 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