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Re: New Server Recommendation -- disk label strategy, quotas, etc...
by "Bryan J. Smith <b.j.smith＠ieee.org>" 15 Jun '05

15 Jun '05

> LVM/LVM2 helps reduce this, but I still like to use the approach > (except I just don't make spares, I just reserve 15-30% of disk > space for LVM/LVM2). Let me clarify that -- I still put the _whole_ disk under LVM/LVM2 (maybe leaving a legacy BIOS/DOS primary 256MB in a pre-formatted FAT16 if I need it for firmware updates). But instead of pre-allocating "spares" of each size (essential/support/discretionary), I reserve 15-30% of the disk for future allocation by LVM/LVM2. -- Bryan J. Smith mailto:b.j.smith@ieee.org

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Re: New Server Recommendation -- disk label strategy, quotas, etc...
by "Bryan J. Smith <b.j.smith＠ieee.org>" 15 Jun '05

15 Jun '05

From: Mike Kercher <mike(a)CamaroSS.net> > I'm about to deploy a new server for hosting sites and email for a > number of small individuals using a CentOS 4 box. I've been looking > for a recommended installation guide for RHEL4/CentOS4 giving > recommended disk partitioning I have personal recommendations I follow. One thing I really try to do is make 2-3 "classes" of filesystem sizes, with 1 "spare" for each. That way I can flop around filesystems, accomodate additions, etc... LVM/LVM2 helps reduce this, but I still like to use the approach (except I just don't make spares, I just reserve 15-30% of disk space for LVM/LVM2). E.g., the "essential" class is typically 2-8GB each. The "support" class is typically 8-64GB each. The "discretionary" class is typically 64+GB each. For all systems, I typically do these "essential" classes: / /tmp /var I also typically create the following "support" classes: /usr /usr/local (and a symlink from /opt -> /usr/local) And more "support" class filesystems for servers: /var (instead of an "essential" size) /srv (newer FHS 2.3+ compliant systems) /var/log /var/lib (application, database, etc... servers) /var/mail (mail servers) /var/spool (mail, print, etc... servers) /var/www (web servers) /var/ftp (FTP servers) In some cases -- FHS 2.3+ compliant -- these are under /srv instead of /var. If I want local data/temporary storage, I typically create of the "discretionary" size: /export|home/(systemname) I like to make at least _3_ "discretionary" size, 2 mounted with 1 spare, so 1/3rd each. Again, in the day of LVM/LVM2, I typically just reserve 15-30% of the disk allocation instead of making pre-made spares of each class -- but I would at least make _2_ "discretionary" size (instead of one big one). I also use "/export" when I know I'm going to be exporting them via NFS (and setting up my NIS/LDAP autmounter maps accordingly). Otherwise I use /home. Even if I'm not sure I'm going to export via NFS, if I'm sharing via SMB, then I put them under /export. In a nutshell, if they are network mountable (for whatever protocol), they are under /export. > as well as quotas. I've not used quotas with LVM yet. Don't quote me, but quotas are a filesystem issue and shouldn't matter with LVM/LVM2 disk labels. I'd personally like to see a performance evaluation of Ext3 v. XFS _with_ quota operations. Most comparisons these days seem to be "raw" block operations -- whether big or small -- instead of disk operations sysadmins would normally do day-to-day. > This box is going to have an 80 IDE system drive, an 80G SATA and a > 250G SATA for everything else. One thing I want to be sure of is that > I don't run out of space for the mail spools in /var/spool/mail. If you are building a new system with such storage requirements, I would really push you towards a 3Ware Escalade 8006-2 or 8506-4. Have you already purchased the hard drives? If so, then merely buy a 2nd 80GB SATA and 2nd 250GB SATA with a 8506-4 and use RAID-1 for each. If not, then just buy a cheaper 8006-2 and use RAID-1 with (2) 300GB disks (you might consider this even if you already have some drives). > Does anyone know of a guide for this online? I think sysadmins differ so widly that there is no uniform approach. Even my 2-3 class approach is rather dated in the age of LVM/LVM2, although I continue to use it out of habit. > I wish Johnny had a guide like this on his site :) Well, I'm sure most of my approaches come from SunOS/Solaris even before Linux really caught on, much less the Linux FHS, more recent updates, etc... -- Bryan J. Smith mailto:b.j.smith@ieee.org

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New Server Recommendation
by Mike Kercher 15 Jun '05

15 Jun '05

I'm about to deploy a new server for hosting sites and email for a number of small individuals using a CentOS 4 box. I've been looking for a recommended installation guide for RHEL4/CentOS4 giving recommended disk partitioning as well as quotas. I've not used quotas with LVM yet. This box is going to have an 80 IDE system drive, an 80G SATA and a 250G SATA for everything else. One thing I want to be sure of is that I don't run out of space for the mail spools in /var/spool/mail. Does anyone know of a guide for this online? I wish Johnny had a guide like this on his site :) Mike

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CentOS-announce Digest, Vol 4, Issue 8
by centos-announce-request＠centos.org 15 Jun '05

15 Jun '05

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2005:415 Low CentOS 4 ia64 squid - security update (Pasi Pirhonen) 2. CESA-2005:504 Moderate CentOS 4 ia64 telnet - security update (Pasi Pirhonen) 3. CESA-2005:415 Low CentOS 3 ia64 squid - security update (Pasi Pirhonen) 4. CESA-2005:504 Moderate CentOS 3 ia64 telnet - security update (Pasi Pirhonen) 5. CESA-2005:504 Moderate CentOS 3 s390(x) telnet - security update (Pasi Pirhonen) 6. CESA-2005:415 Low CentOS 4 x86_64 squid - security update (Johnny Hughes) 7. CESA-2005:415 Low CentOS 4 i386 squid - security update (Johnny Hughes) 8. CESA-2005:504 Moderate CentOS 4 i386 telnet - security update (Johnny Hughes) 9. CESA-2005:504 Moderate CentOS 4 x86_64 telnet - security update (Johnny Hughes) 10. CESA-2005:415 Low CentOS 3 s390(x) squid - security update (Pasi Pirhonen) 11. CESA-2005:504 Moderate CentOS i386 telnet - security update (Tru Huynh) 12. CESA-2005:415 Low CentOS i386 squid - security update (Tru Huynh) 13. CESA-2005:504 Moderate CentOS x86_64 telnet - security update (Tru Huynh) 14. CESA-2005:415 Low CentOS x86_64 squid - security update (Tru Huynh) 15. CESA-2005:504-00: Moderate CentOS 2 i386 telnet security update (John Newbigin) ---------------------------------------------------------------------- Message: 1 Date: Tue, 14 Jun 2005 23:28:53 +0300 From: Pasi Pirhonen <upi(a)iki.fi> Subject: [CentOS-announce] CESA-2005:415 Low CentOS 4 ia64 squid - security update To: centos-announce(a)centos.org Message-ID: <20050614202853.GV21054(a)core.upi.iki.fi> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory 2005:415 https://rhn.redhat.com/errata/RHSA-2005-415.html The following updated files have been uploaded and are currently syncing to the mirrors: files: updates/ia64/RPMS/squid-2.5.STABLE6-3.4E.9.ia64.rpm -- Pasi Pirhonen - upi(a)iki.fi - http://iki.fi/upi/

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Centos 3.x telnet update problem
by Les Mikesell 15 Jun '05

15 Jun '05

A 'yum update' on a Centos 3.x machine is giving: Getting telnet-0.17-26.EL3.3.i386.rpm telnet-0.17-26.EL3.3.i386 100% |=========================| 48 kB 00:00 Error: Unsigned Package /var/cache/yum/update/packages/telnet-0.17-26.EL3.3.i386.rpm Is this a bad package? -- Les Mikesell lesmikesell(a)gmail.com

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system environment variables
by Ken Godee 15 Jun '05

15 Jun '05

CentOS 3.x Don't know how this got by me, but for years I've been previously using /etc/profile to set system wide environment variables and now I just noticed it doesn't work any more (sort of). If you log in via console it works, log in via gdm, it does not, but use to work. Now I noticed if I create script files for the vars I want exported and include them in /etc/profile.d/ the vars get set either way. Is this now the correct way to set system environment variables by using script files in the /etc/profile.d/ ????? Sorry, I couldn't find info on this, most info says to use /etc/profile

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Re: [CentOS-announce] CESA-2005:504 Moderate CentOS i386 telnet - security update
by Peter Arremann 15 Jun '05

15 Jun '05

On Tuesday 14 June 2005 18:56, Tru Huynh wrote: > CentOS Errata and Security Advisory CESA-2005:504 > > telnet security update security update for CentOS 3 i386: > https://rhn.redhat.com/errata/RHSA-2005-504.html > > The following updated file has been uploaded and is currently syncing to > the mirrors: > > i386: > updates/i386/RPMS/telnet-0.17-26.EL3.3.i386.rpm > updates/i386/RPMS/telnet-server-0.17-26.EL3.3.i386.rpm > > source: > updates/SRPMS/telnet-0.17-26.EL3.3.src.rpm > > You may update your CentOS-3 i386 installations by running the command: > > yum update telnet\* > > Tru Thanks as always for the great work but it seems like this time you forgot to sign the package.. # yum update telnet\* Gathering header information file(s) from server(s) Server: CentOS-3 - Addons Server: CentOS-3 - Base Server: CentOS-3 - Extras Server: CentOS-3 - Updates Finding updated packages Downloading needed headers Resolving dependencies Dependencies resolved I will do the following: [update: telnet-server 1:0.17-26.EL3.3.i386] [update: telnet 1:0.17-26.EL3.3.i386] Is this ok [y/N]: y Downloading Packages Error: Unsigned Package /var/cache/yum/update/packages/telnet-server-0.17-26.EL3.3.i386.rpm Error: You may want to run yum clean or remove the file: /var/cache/yum/update/packages/telnet-server-0.17-26.EL3.3.i386.rpm Error: You may need to disable gpg checking to install this package Peter.

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CentOS / BQ / PHP 4.3.9 with the mail() function
by Jon McCauley 15 Jun '05

15 Jun '05

Hey everyone! Got a little problem...with CentOS / BQ / PHP 4.3.9 with the mail() function I'm able to send mail using postfix directly from the command line, however when I try using the mail function of php no mail is being sent. This simple script works on all my older Cobalt Boxs. <? if($action=="send") { $to = 'me(a)domain.dot'; $subject = 'the subject'; $message = 'hello'; $headers = 'From: me(a)domain.dot' . "\r\n" . 'Reply-To: me(a)domain.dot' . "\r\n" . 'X-Mailer: PHP/' . phpversion(); mail($to, $subject, $message, $headers); ?> the queue looks like this.... Jun 14 11:47:45 bq0 sendmail[19390]: j5EFljEU019390: from=<>, size=1146, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost [127.0.0.1] Jun 14 11:47:45 bq0 sendmail[19389]: j5EFljk1019389: j5EFljk2019389: return to sender: User unknown Jun 14 11:47:45 bq0 sendmail[19390]: j5EFljEW019390: from=<>, size=3858, class=0, nrcpts=1, msgid=<200506141547.j5EFljk2019389(a)bq.ontarioservers.com>, proto=ESMTP, daemon=MTA, relay=localhost [127.0.0.1] Jun 14 11:47:45 bq0 sendmail[19389]: j5EFljk2019389: to=postmaster, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=32170, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (j5EFljEW019390 Message accepted for delivery) Jun 14 11:47:45 bq0 sendmail[19391]: j5EFljEW019390: to=admin, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=34070, dsn=2.0.0, stat=Sent I did a some googling and found a post http://forums.fedoraforum.org/showthread.php?t=27608 Any sujestons as what I should do .....I dont want to play with another script to get this done??....thanks in advance -- Best Regards, Jon McCauley

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x11 update problems
by Rick Ziegler 15 Jun '05

15 Jun '05

Hello, I had a power outage during a 'yum update' and I think something may have gotten corrupted in the process. Trying to run 'yum update' again gives the following errors on the most recent x11 packages: Error: Missing Dependency: xorg-x11 = 6.8.1-23.EL is needed by package xorg-x11-Xvfb I've tried removing /var/yum/cache, and various yum and rpm command line options for these 2 and other x11 packages, but can't seem to get past this. Does anyone know how to re-install these latest x11 packages? I'm running CentOS release 4.0 (Final). Thanks in advance, and let me know if there's any additional info I can provide. ~Rick __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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Re: [CentOS] A questiong about replacing my failing drive
by Bryan J. Smith <b.j.smith＠ieee.org> 15 Jun '05

15 Jun '05

From: Matthew Miller <mattdm(a)mattdm.org> > Serious in some cases; not in the general case. Given the above, there has > to be something *widespread* that ext3 just *can't* do. Agreed. I think that's what it's going to take. Regardless, XFS is GPL, so we all benefit. Just the XFS dump, resize, etc... tools, as well as day 1 this'n that support. Just too tasty compared to the "work-in-progress" I always see on everything else. -- Bryan J. Smith mailto:b.j.smith@ieee.org

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