Re: [CentOS-docs] What's an Enterprise class OS
Steve Tindall wrote: When looking for a reference to post in response to a question, I often find it hard to locate questions in the FAQs that I know exist, but sometimes that's because of the web vs. wiki FAQs issue (i.e., I'm looking in the wrong one). The problem with the FAQs on the web site is, that only a small amount of people can edit there - and those are the people who tend to have not enough time as it is at the moment. That's why the FAQs on the wiki are more current. On the other hand you can add comments to the FAQs on the web site which isn't that easy to do with the wiki. I tested some comment plugin for moin on wiki-m.centos.org, but that has one major drawback: It works fine for normal article pages (so maybe we should incorporate it into the wiki), but you cannot have more than one instance of that plugin per page. Tat means that you can only add comments to the complete FAQ section, not to single questions on that FAQ. Cheers, Ralph pgpRRqEx6QPoG.pgp Description: PGP signature ___ CentOS-docs mailing list CentOS-docs@centos.org http://lists.centos.org/mailman/listinfo/centos-docs
Re: [CentOS-docs] What's an Enterprise class OS
Ralph Angenendt wrote: Steve Tindall wrote: When looking for a reference to post in response to a question, I often find it hard to locate questions in the FAQs that I know exist, but sometimes that's because of the web vs. wiki FAQs issue (i.e., I'm looking in the wrong one). The problem with the FAQs on the web site is, that only a small amount of people can edit there - and those are the people who tend to have not enough time as it is at the moment. The more I think about this, and in relation to the whole WebSite2 vision, I'm wondering if a simple static page at www.centos.org is all that may be needed combined with wiki.centos.org for content/docs etc, forums.centos.org, MLs and IRC for support, and projects.centos.org/trac for the other stuff. At least with a simple static front page that say what the project is all about and links to the important areas it's not something that needs updating and thus isn't a burden on those who can least afford the time plus then the Wiki editorial group could take on much of the rest hopefully freeing up the core devs to do what only they can do. The Wiki could host much of the content that's currently on www.centos.org. Don't shoot me... just thinking out loud :D I'd be interested to hear opinion from Karanbir, Dag and others who've been active in this area recently. ___ CentOS-docs mailing list CentOS-docs@centos.org http://lists.centos.org/mailman/listinfo/centos-docs
Re: [CentOS-docs] Test-driving RHEL Betas
Dag Wieers wrote: You need a RHN entitlement. So that's hardly pushing. Look at it from some other angels. - It shows people we are helping to give back to upstream (and not just reaping) - It encourages people to help CentOS as well - It shows Red Hat we are willing to help with Beta-testing even when a RHN entitlement is required, showing that we care about this sends a message. And I don't see a big problem with having this on the Download page. It clearly says test-driving, beta's, I put it at the end of the page. I think this is different than test repositories where it is much easier to make a mistake on an existing production system. I think you are missing the point completely. Pushing the beta's at someone who comes to look for CentOS as the distro is wrong. they are not there looking to help the project or to do a survey on what centos feeds upstream, they are there to get the distro, and do whatever they want with it. btw, upstream seemed quite firm on not doing so ( my impression again ) when the same issue was quite hotly contested as a sub-issue in the fedora-devel conversation about wikipedia's move to ubuntu and implications / fallouts from that. Did they discuss the availability of RHEL Betas during that conversation ? based on the emails that made it to centos-devel; yes. BTW My original change did contain a comment on what I just added. but lots of other commits dont have comments at all. making it quite hard to work out what the changes are. I guess the only way to do that is to take a large number of commits, and diff the changes between them. -- Karanbir Singh : http://www.karan.org/ : [EMAIL PROTECTED] ___ CentOS-docs mailing list CentOS-docs@centos.org http://lists.centos.org/mailman/listinfo/centos-docs
Re: [CentOS-docs] What's an Enterprise class OS
Ned Slider wrote: The more I think about this, and in relation to the whole WebSite2 vision, I'm wondering if a simple static page at www.centos.org is all that may be needed combined with wiki.centos.org for content/docs etc, forums.centos.org, MLs and IRC for support, and projects.centos.org/trac for the other stuff. as has been repeatedly pointed out on this list and other places, that is not going to happen unless there are certain benchmarks met. I dont see any effort towards that at the moment, so no - that wont be happening anytime soon. i'd be happy to work with any group of people who want to setup and run a documentation sub-sig that address's the issues of content navigation and content management from both sides : (1) the project and (2) the distro. Both of which are very different from each other. At least with a simple static front page that say what the project is all about and links to the important areas it's not something that needs updating and thus isn't a burden on those who can least afford the time plus then the Wiki editorial group could take on much of the rest hopefully freeing up the core devs to do what only they can do. The Wiki could host much of the content that's currently on www.centos.org. Actually no. the wiki is incapable of hosting more than 15% or so of the content in www.centos.org - but if you think that more can be moved over, I'd like to hear how you worked that out :D - KB -- Karanbir Singh : http://www.karan.org/ : [EMAIL PROTECTED] ___ CentOS-docs mailing list CentOS-docs@centos.org http://lists.centos.org/mailman/listinfo/centos-docs
Re: [CentOS-docs] What's an Enterprise class OS
Replying to myself, since this last line was perhaps not very clear... Karanbir Singh wrote: (3) Do nothing. Maintaining the web site is not important. I'm sure no one would agree (3) is a solution. But if we do not come up with viable solutions and start actively working on it, we would end up with (3). Isnt (2.9) where we are now ? I meant - isnt getting close to (3) what so many people seem to be proposing at this time. -- Karanbir Singh : http://www.karan.org/ : [EMAIL PROTECTED] ___ CentOS-docs mailing list CentOS-docs@centos.org http://lists.centos.org/mailman/listinfo/centos-docs
Re: [CentOS-es] No puedo crear grupos de correo
EL CORREO COMO SERVIDOR ES LO DE MENOS NO ENTIENDO QUE QUIERES HACER
PUNTUALMENTE PORQUE SI ES PARA EL ENVIO DE CORREOS MASIVOS TE ENVI EL
SIGUIENTE DETALLE:
1.
Lo primero será generar un fichero en el sistema el cual tendrá como
contenido una lista de los usuarios del sistema a los cuales se quiere
enviar un mensaje. Este puede localizarse en cualquier lograr del sistema,
como por ejemplo /etc/mail/allusers. Puede editarse el fichero
/etc/mail/allusers y añadir individualmente cada usuario que se desee
conforme esa lista o bien, si se quiere añadir a todos los usuarios del
sistema, ejecutar lo siguiente:
awk -F: '$3 500 { print $1 }' /etc/passwd /etc/mail/allusers
2.
A continuación, debe editarse el fichero /etc/aliases y añadir al final
del mismo:
allusers: :include:/etc/mail/allusers
3.
Al terminar solo debe ejecutarse el mandato newaliases o bien reiniciar
el servicio de Sendmail (el guión de inicio se encarga de hacer todo lo
necesario).
4.
Para probar, solo bastará enviar un mensaje de correo electrónico a la
cuenta allusers del servidor.
ATTE
FRANCISCO VALVERDE
ADMINISTRADOR NETWORKING UCE
2008/11/10 Wilder Deza [EMAIL PROTECTED]
Lo puedes hacer con el qmail.
* *
Saludos,
FRANCISCO VALVERDE escribió:
para crear grupos debes estar como root
groupadd personal
groupadd tutores
para cada usuario debes crearlo de la siguiente manera:
porejemplo:
usuario pedro robles: useradd -m -g personal probles (si es para personal)
useradd -m -g tutores probles (si es
para tutores)
para visualizar los usuarios con ls -l piedes ver los usuarios y sus
grupos
atte
Francisco Valverde
Administrador Networking Universidad Central del Ecuador
2008/11/10 Richard Lazo [EMAIL PROTECTED] mailto:[EMAIL PROTECTED]
Estimados, estoy iniciandome en linux con la version de CentOs 5,
en mi trabajo lo utilizan como servidor de correos ya tengo los
usurios creados y estan trabajando normalmente, me han pedido
crear grupso de correo como por ejemplo: personal, tutores y
cuando le indiquen [EMAIL PROTECTED]
mailto:[EMAIL PROTECTED] enviar a todos los usuarios que esten
en ese grupo.
Alguna sugerencia, he revisado pagianas de internet y me han dicho
como crear los grupos pero no los reconoce cuando enviolos correos.
Agradeceré la información
--Saludos
Richard Lazo Vigil
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Re: [CentOS-es] No puedo crear grupos de correo
Hola: trabajo lo utilizan como servidor de correos ya tengo los usurios creados y estan trabajando normalmente, me han pedido crear grupso de correo como por ejemplo: personal, tutores y cuando le indiquen [EMAIL PROTECTED] enviar a todos los usuarios que esten en ese grupo. Alguna sugerencia, he revisado pagianas de internet y me han dicho como crear los grupos pero no los reconoce cuando enviolos correos. primero que nada, avisa que MTA (servidor de correo) estas utilizando. Eso que necesitas se puede hacer con aliases (que depende de si utilizas sendmail, postfix, qmail.. seria como lo implementarias) o puedes decidirte por un gestor de listas de correo como el mailman. Tiene la ventaja de que lo puedes administrar con una interface web, tiene la desventaja de que seria un poco grande para lo que te estan pidiendo pues ofrece mucho mas de lo que ahora necesitas, pero no seria una mala opcion, vas practicando y te preparas para el futuro. Saludos Osvaldo ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
[CentOS-es] Oracle 10 Exprres Edition
Buenas noches estoy tratando de instalar esta version de oracle en mi servidor centos 5, Aparentemente instala bien ya que me pide los puertos de configuracion y qeu me dice que la instalacion finalizo con extio, pero al tratar de ingresar via web a http:127.0.0.1:8080/apex el navegador me muetra un error diciendome que no se puede conectar. Abri los puertos 8080 y 1525 por medio de firestarter pero tampoco me dejo ingresar. Agradezco la colaboracion que me puedan prestar Premios MTV 2008¡En exclusiva! Fotos, nominados, videos, y mucho más! Mira aquí http://mtvla.yahoo.com/ ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] Oracle 10 Exprres Edition
Rene Chirivi escribió: Buenas noches estoy tratando de instalar esta version de oracle en mi servidor centos 5, Aparentemente instala bien ya que me pide los puertos de configuracion y qeu me dice que la instalacion finalizo con extio, pero al tratar de ingresar via web a http:127.0.0.1:8080/apex el navegador me muetra un error diciendome que no se puede conectar. Abri los puertos 8080 y 1525 por medio de firestarter pero tampoco me dejo ingresar. Agradezco la colaboracion que me puedan prestar Hola! Por si acaso.. la dirección correcta sería: http://127.0.0.1/apex Antes de volverte loco, comprueba que realmente Oracle XE está escuchando en ese puerto con un netstat -punta | grep LISTEN, por ejemplo.. ¿La máquina donde está instalado Oracle es la misma desde la que te estás conectado? Si no es imposible que te conectes por la dirección 127.0.0.1.. Saludos! -- Santi Saez http://woop.es ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS] cant boot after installation of centos 5
Muhammad Alif Mohd Latif wrote: Hi all, I'm having problems with the installation of CentOS 5 for i386 to my Dell Percision T4500 Workstation. 5? 5.1? 5.2? The installation run just fine. The installation DVD had been tested before installation. After installation, the installer ask me to reboot. after reboot, when the msg for LVM saying detection of my LVMs, 1 or 2 lines after that my monitor turned off, but i believed the cpu is still running. I tried reboot several times but still got same problem. Can some one help me? Not much to go on. http://www.catb.org/~esr/faqs/smart-questions.html Since you say Workstation one might presume that you are running in GUI mode. Have you tried booting to runlevel 1 or 3? Turning off quiet mode? Might see some useful hints. In GRUB type a to append/edit the kernel boot line. Delete rhgb quiet and replace it with 1 or single for single-user mode, or 3 for full network boot without GUI. See if anything enlightening shows up. Phil begin:vcard fn:Philip Schaffner n:Schaffner;Philip org:NASA Langley Research Center;Electromagnetics and Sensors Branch adr:Mail Stop 473;;8 North Dryden Street;Hampton;VA;23681;USA email;internet:[EMAIL PROTECTED] title:Aerospace Technologist tel;work:757-864-1809 tel;fax:757-864-7891 x-mozilla-html:FALSE version:2.1 end:vcard ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Hwinfo
Anne Wilson wrote: On Monday 10 November 2008 00:24:05 Dag Wieers wrote: On Sun, 9 Nov 2008, jarmo wrote: Has anyone info about package hwinfo for Centos, rhel, fedora? Nice piece of commandline tools. I tried, but hwinfo is very SuSE specific. Dag, I used hwinfo years ago on Mandrake/Mandriva systems. Maybe something helpful there? I agree with jarmo - it's an excellent tool This SRPM builds/runs on CentOS 5.2. http://oss.oracle.com/projects/yast/dist/files/el5/src/hwinfo-13.57-2.src.rpm BuildRequires: doxygen flex hal-devel perl-XML-Parser perl-XML-Writer udev Phil begin:vcard fn:Philip Schaffner n:Schaffner;Philip org:NASA Langley Research Center;Electromagnetics and Sensors Branch adr:Mail Stop 473;;8 North Dryden Street;Hampton;VA;23681;USA email;internet:[EMAIL PROTECTED] title:Aerospace Technologist tel;work:757-864-1809 tel;fax:757-864-7891 x-mozilla-html:FALSE version:2.1 end:vcard ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Hwinfo
Anne Wilson kirjoitti viestissään (lähetysaika maanantai, 10. marraskuuta 2008): On Monday 10 November 2008 00:24:05 Dag Wieers wrote: On Sun, 9 Nov 2008, jarmo wrote: Has anyone info about package hwinfo for Centos, rhel, fedora? Nice piece of commandline tools. I tried, but hwinfo is very SuSE specific. Dag, I used hwinfo years ago on Mandrake/Mandriva systems. Maybe something helpful there? I agree with jarmo - it's an excellent tool Anne I tried MDV packet, but there is some depencies what didn' match even I have required libaries installed, but ofcourse wrong serial. As well as connectivas package, didn't get SuSe's yet, but bet there's maybe other depencies required than tose other distro's. Original Hwinfo is made for Debian based systems, I think. Jarmo ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] can I use 2 HDD's with the same LVM labels at the same time?
On Sun, 2008-11-09 at 23:51 -0800, nate wrote: Rudi Ahlers wrote: Basically, most HDD's are setup the same, but I want to add another HDD to the same server, and use data on both HDD's. So, do I rename System with vgrename then? If your wanting to add a new disk to the same volume group and use it then no you don't need to rename anything, you can use the vgextend command after running pvcreate on the new disk to extend the existing volume group to the new disk. If your wanting to add an existing disk to a system that already has a conflicting volume group name in it, then yes you'll need to vgrename one of them so they do not conflict. Hmmm. I've not seen vgexport/vgimport mentioned. Will this be needed? I'm not sure for this particular situation. nate snip sig stuff -- Bill ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
RE: [CentOS] Hiding Files in Samba
Vandaman Wrote: hide files = /~*/ johnStanley Write: Did not think of the hide files option untill someone mentioned it earlier. So to be correct you are using samba to share out Win Shares right? ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] [SOLVED] Problem with widescreen display
On Mon, 2008-11-10 at 00:20 +, Marko Vojinovic wrote: On Saturday 01 November 2008 22:08, Marko Vojinovic wrote: Basically, what I did was to run system-config-display to reconfigure for the new monitor and resolution. All goes well, but after X restarts, I see a strange picture: the resolution indeed goes to 1680x1050 as is supposed to, but is squeezed/shrinked/scaled horizontally to match a 4:3 aspect ratio, leaving two (unequal) black bands on the left and right side of the monitor. [snip] The very same hardware and virtually same X configuration work perfectly ok on FC4 [snip] Ok, just for the record, I resolved the issue, in the following way: - took the exact modeline parameters for 1680x1050 (known to work) from FC4's Xorg.0.log and copy-pasted it into CentOS's xorg.conf - also took the DisplaySize, HorizSync and VertRefresh parameters from the Fedora's log and put it into xorg.conf - Disabled the DDC (undocumented option!!!) - CRUCIAL PART !!! - took the modeline parameters for various other resolutions since without DDC nothing gets autoconfigured - restarted X Now everything works perfectly, and my hacked xorg.conf is just the default one with the following Monitor section: Section Monitor Identifier Monitor0 ModelName LCD Panel 1680x1050 # hacked DisplaySize --- note that the values are *wrong*, # monitor is actually 470x300 mm DisplaySize 370 280 HorizSync 31.5 - 90.0 VertRefresh 60.0 - 60.0 Option dpms # turned off the DDC; didn't know which option would do # the job so put them both there Option NoDDC true Option DDC false # various modelines, taken from Fedora's log: Modeline 1680x1050 147.14 1680 1784 1968 2256 1050 1051 1054 1087 -hsync +vsync Modeline 1400x1050 122.00 1400 1488 1640 1880 1050 1052 1064 1082 +hsync +vsync Modeline 800x600 40.00 800 840 968 1056 600 601 605 628 +hsync +vsync Modeline 640x480 25.20 640 656 752 800 480 490 492 525 -hsync -vsync EndSection Hopefully someone with a similar problem maybe finds this useful. ;-) Well, I think its utility is such that it ought to be in the wiki hints. If you have time and interest, why don't you ask the folks for access and location in the wiki? Adding a little commentary about the meaning of the values would make it useful to similar, but slightly different, setups as well. Glad you fingered it out. Best, :-) Marko snip -- Bill ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Reinstalled Windows and GRUB - Cannot boot Linux - fstab and grub.conf errors?
On Sun, Nov 9, 2008 at 9:06 AM, partha chowdhury [EMAIL PROTECTED] wrote: Lanny Marcus wrote: snip 01 /dev/hda1 ntfs Active 02 /dev/hda2 ext3 (/boot) 03 /dev/hda3 unknown (CentOS LVM) AFAIK,in centos or fedora a boot partition cannot reside in an LVM volume.a boot partition must be a regular ext2 or ext3 file system. Yes. There's a separate ext3 partition, /boot, with 102 MB, that's /dev/hda2 and it isn't in an LVM. Problem now, as I just replied to Vandaman, is that my CentOS 5 Installation DVD got damaged, after I reinstalled GRUB and before I could modify two configuration files. I have several Live CDs, but don't know how to get real root privileges with them. Sorry for delay in my reply. Our ADSL was down. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Hwinfo
On Mon, 10 Nov 2008, Anne Wilson wrote: On Monday 10 November 2008 00:24:05 Dag Wieers wrote: On Sun, 9 Nov 2008, jarmo wrote: Has anyone info about package hwinfo for Centos, rhel, fedora? Nice piece of commandline tools. I tried, but hwinfo is very SuSE specific. Dag, I used hwinfo years ago on Mandrake/Mandriva systems. Maybe something helpful there? Hmm, then I am probably confusing it with some other tool I tried to package coming from SuSE. I do have a SPEC file on my buildsystem, but it does not work. I will investigate when I find the time. -- -- dag wieers, [EMAIL PROTECTED], http://dag.wieers.com/ -- [Any errors in spelling, tact or fact are transmission errors] ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
RE: [CentOS] Parallel/Shared/Distributed Filesystems
Geoff Galitz Blankenheim NRW, Deutschland http://www.galitz.org -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of nate Sent: Montag, 10. November 2008 16:32 To: centos@centos.org Subject: Re: [CentOS] Parallel/Shared/Distributed Filesystems If you really want GFS then I would look into running NFS over GFS with a high availability NFS cluster. Red Hat wrote this useful doc on how to deploy such a system: The main issue is that we feel that our current solution (Linux NFS Clients - NetApp) is not sufficient. Our team comes from a Solaris background (my colleague) and an HPC background (me) and are worried about running into scalability issues as our infrastructure grows and the internal network becomes busier and busier. We've already been wrestling with issues such as broken mountpoints, stale mounts and unrecoverable hangs. Fortunately those issues have all been resolved for now, but as we continue to grow we may see them recur. Consider all that as background. The NetApp is running out of space and we prefer to not replace it with another one, if possible. To that end we are exploring our options. I played around with iSCSI, Multipath and NFS and have found that works quite well so far. Queuing data for delivery when a node become unavailable using multipath would be sufficient for our needs. Our internal monitoring systems can take action if a server becomes unavailable and the data can be queued up long enough for any recovery actions to complete (apart from the next big earthquake). We do not necessarily require a more traditionak redundant storage system (such as an NFS cluster with dedicated NFS server nodes)... but we are not ruling that out, either. Just all food for thought. -geoff ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Re: Reinstalled Windows and GRUB - Cannot boot Linux - fstab and grub.conf errors?
On Sun, Nov 9, 2008 at 4:22 AM, Vandaman [EMAIL PROTECTED] wrote: There is a Permissions problem, when I try to access /boot/grub/grub.conf and /etc/fstab so I can edit them. How can I do that, using the Live CD's I have? I need root access. Instead of using a LIVECD, have you tried using the CentOS rescue CD and then using the grub command. I don't have Centos 5 but you can look at the CentOS docs or a quick Fedora example below. http://dailypackage.fedorabook.com/index.php?/archives/158-System-Recovery-Week-Rescue-Mode-and-Reinstalling-Grub.html Initially, I was able to boot the CentOS 5 Installation DVD and that is how I reinstalled GRUB, using linux rescue, after the reinstallation of MS Windows on this dual boot box. Somehow, the CentOS 5 Installation DVD got damaged, as I tried to resolve this problem, so now I am limited to the Live CDs I have and since I am very limited in my knowledge of Linux, I don't know how to get real root privileges, while using the Live CDs. Seems like I need to solve two (2) problems, in order to get GRUB working properly again on this dual boot box and be able to boot into Linux again: (a) Get real root access, while using Live CD's (b) Modify one or two configuration files (/etc/fstab and /boot/grub/grub.conf) to reflect the fact that now there is only one partition for Windows, where previously there were four Windows partitions. Question: You mentioned the CentOS rescue CD. Is there something else, other than the CentOS 5 Installation DVD I have, which is damaged? Our DSL is very slow (550) so it would take me a long time to try to download that. Note: Sorry for my delay in replying to you. Our ADSL went down yesterday and the phone company just fixed their problem. TIA. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] HA Storage Cookbook?
Les Mikesell wrote: But, I think the OP's real problem is that everything is tied to one single large drive (i.e. the software mirroring is mostly irrelevant as ... I think that Les makes a good point, and I'd like to push the point even more generally: providing network file storage, via SAN or NFS is that when you have a single service instance, you need procedures and/or layers of caching to deal with outages. I've been using a DRBD cluster joined by a bonded GigE switch and it replicates quite quickly. My issues have been related to Heartbeat and monitoring. We've learned it's very important to practice and tune the fail-over process and detect on file system performance rather than merely pinging. Also, it's necessary to monitor application performance to see if your storage nodes are suffering load issues. I've seen a two-core nfs server perform reliably under load 6-7 but it starts to get unhappy at any higher load. Ironically, we've had absolutely no hard drive errors yet. Hardware things that come to mind are: mother boards: I've had more mother board and ram failures than drive failures with the systems we've had. Raid cards: we've had to swap out 2 3Ware raid controllers also. Network failures will get you down if you're looking for uptime as well: we recently had a nic in one of our storage nodes get into a state where it was spouting 60Mbit of bad packets and created quite a layer-2 networking issue for two cabinets of web servers and two ldap servers. When the ldap servers couldn't respond, the access to the storage nodes got even worse. It was a black day. The next thing in our setup has to do with reliance of NFS. NFS may not the best choice to put behind web-servers, but it was quickest. We're adjusting our application to caching the data found on NFS nodes on local file-systems so that we can handle an NFS outage. My take is: if you're a competent Linux admin, DRBD will cost you less with by using appropriate servers be more maintainable than an appliance. The challenge of course is working out how to reduce response time when any hardware goes sour. Good luck Jed ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Reinstalled Windows and GRUB - Cannot boot Linux - fstab and grub.conf errors?
Lanny Marcus wrote: [snip] I have several Live CDs, but don't know how to get real root privileges with them. Often su - in a terminal window is all that's required to get root for a live CD. Phil begin:vcard fn:Philip Schaffner n:Schaffner;Philip org:NASA Langley Research Center;Electromagnetics and Sensors Branch adr:Mail Stop 473;;8 North Dryden Street;Hampton;VA;23681;USA email;internet:[EMAIL PROTECTED] title:Aerospace Technologist tel;work:757-864-1809 tel;fax:757-864-7891 x-mozilla-html:FALSE version:2.1 end:vcard ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Parallel/Shared/Distributed Filesystems
Geoff Galitz wrote: I'm looking at using GFS for parallel access to shared storage, most likely an iSCSI resource. It will most likely work just fine but I am curious if folks are using anything with fewer system requisites (e.g. installing and configuring the Cluster Suite). Export the iSCSI resource to a box and re-export it over NFS would be quite a bit simpler, sounds like your JPG needs are very basic, GFS sounds overkill. Note that iSCSI isn't very fast at all, if your array supports fiber channel I'd highly recommend that connectivity to the NFS servers over iSCSI any day. If your only choice is iSCSI then I suggest looking into hardware HBAs, and certainly run jumbo frames for the iSCSI links, use dedicated network connections for the iSCSI network. And if you want even higher performance use dedicated links for the NFS serving as well also with jumbo frames. If you really want GFS then I would look into running NFS over GFS with a high availability NFS cluster. Red Hat wrote this useful doc on how to deploy such a system: http://sources.redhat.com/cluster/doc/nfscookbook.pdf My company does something similar, that is we process terrabytes of data every day for our application, amongst a good 150 servers or so, today we are using a 520-disk BlueArc-based NAS solution that the company bought about 4 years ago, looking to replace it with something else as the NAS portion will be end of lifed soon. I absolutely would not trust any linux-based NFS or even GFS over a well tested/supported solution myself for this kind of requirement(most of the cost of the solution is the back end disks anyways). Though if the volume of data is small, and the I/O rates are small as well you can get by just fine with a linux based system. If your using iSCSI your performance bottleneck will likely be the iSCSI system itself anyways, rather than the linux box(s). nate ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Hwinfo
On Monday 10 November 2008 00:24:05 Dag Wieers wrote: On Sun, 9 Nov 2008, jarmo wrote: Has anyone info about package hwinfo for Centos, rhel, fedora? Nice piece of commandline tools. I tried, but hwinfo is very SuSE specific. Dag, I used hwinfo years ago on Mandrake/Mandriva systems. Maybe something helpful there? I agree with jarmo - it's an excellent tool Anne signature.asc Description: This is a digitally signed message part. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Parallel/Shared/Distributed Filesystems
Geoff Galitz wrote: I'm looking at using GFS for parallel access to shared storage, most likely an iSCSI resource. It will most likely work just fine but I am curious if folks are using anything with fewer system requisites (e.g. installing and configuring the Cluster Suite). Specifically to our case, we have 50 nodes running in-house code (some in Java, some in C) which (among other things) receives JPGs, processes them and stores them for later viewing. We are looking to deploy this filesystem specifically for this JPG storage component. All nodes are running Centos 5.1 x86_64. -geoff Hi Maybe you can consider pNFS, parallel NFS: http://www.pnfs.com/ Regards Marcelo ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
RE: [CentOS] Parallel/Shared/Distributed Filesystems
Geoff Galitz wrote: The NetApp is running out of space and we prefer to not replace it with another one, if possible. To that end we are exploring our options. NetApp, while it has a big name has the worst level of space efficiency in the industry and it's performance isn't so hot either. It does have some nice features though it depends on your needs. The solutions we are looking at here is a 3PAR T400-based back end with a Exanet EX1500 cluster(2-node) front end, and a HDS AMS2300-based back end with a BlueArc Titan 3100 cluster(2-node) front end. Though I'm not at all satisfied with the scalability of the AMS2300 the vendor is grasping at straws trying to justify it's existence, the higher end AMS2500 would be more suitable (still not scalable), though the vendor refuses to quote it because it's not due till late this year/early next. Both NAS front ends scale to 8 nodes(with Exanet claiming unlimited nodes though 8 is their currently supported maximum). 8 nodes is enough performance to drive 1,000 SATA disks or more. The 3PAR T400 back end has linear scalability to 1,152 SATA disks (1.2PB), the AMS2300 goes up to 240 disks(248TB). Both NAS front end clusters can each address a minimum of 500TB of storage(per pair) and support millions of files per directory without a performance hit. I talked with NetApp on a couple of occasions and finally nailed down that their competitive solution would be their GX product line but I don't think they can get the price to where the competition is as they promised pricing 3 weeks ago and haven't heard a peep since. The idea is to be able to start small(in our case ~100TB usable), and be able to grow much larger as the company needs within a system that can automatically re-balance the I/O as the system expands for maximum performance while keeping a price tag that is within our budget. Our current 520-disk system is horribly unbalanced and it's not possible to re-balance it without massive downtime, the result is probably at least a 50% loss in performance overall. Of course there are lots of other goals but that's the biggie. The 3PAR/Exanet solution can scale within a single system to approx 630,000 SpecSFS IOPS on a single file system, the HDS/BlueArc solution can scale to about 150,000 SpecSFS IOPS on a couple of file systems. The 3PAR would have 4 controllers, Exanet would have 8 controllers, HDS would have 2 controllers, BlueArc would have 2 controllers at their peak. In both cases the performance limit is the back end storage, not the front end units. Of course nothing stops the NAS units from being able to address storage beyond a single array but you lose the ability to effectively balance the I/O across multiple storage systems in that event which leads to the problem we have with our current system. Perhaps if your willing to spend a couple million a HDS USP-based system might be effective balancing across multiple systems with their virtualized thingamabob. Our budget is a fraction of that though. NetApp's (non-GX) limitations prevent it from competing in this area effectively.(They do have some ability to re-balance but it pales in comparison). nate ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] cant boot after installation of centos 5
Hi all, I'm having problems with the installation of CentOS 5 for i386 to my Dell Percision T4500 Workstation. The installation run just fine. The installation DVD had been tested before installation. After installation, the installer ask me to reboot. after reboot, when the msg for LVM saying detection of my LVMs, 1 or 2 lines after that my monitor turned off, but i believed the cpu is still running. I tried reboot several times but still got same problem. Can some one help me? -- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, MALAYSIA ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Hwinfo
Dag Wieers wrote: Hmm, then I am probably confusing it with some other tool I tried to package coming from SuSE. I do have a SPEC file on my buildsystem, but it does not work. I will investigate when I find the time. Hwinfo is SUSE specific. Debian page says :- Debian -- Details of package hwinfo in sid hwinfo is the hardware detection tool used in SuSE Linux. In Debian Edu ( Skolelinux) hwinfo has shown better results than discover when detecting mouse, .. The Mandriva spec file lists :- Add debian patch to get it build in non-suse distro Regards, Vandaman. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Where is the file that sets aliases?
Anne Wilson wrote on Sun, 9 Nov 2008 09:51:16 +: /root/.bashrc That's exactly what I was looking for, thanks. That was already told very early on, but you didn't notice it! Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Reinstalled Windows and GRUB - Cannot boot Linux - fstab and grub.conf errors?
On Mon, Nov 10, 2008 at 11:38 AM, Phil Schaffner [EMAIL PROTECTED] wrote: Lanny Marcus wrote: I have several Live CDs, but don't know how to get real root privileges with them. Often su - in a terminal window is all that's required to get root for a live CD. Phil: I think I tried that, Saturday afternoon, but I will try it again, after my daughter gets home. As I recall, that did not get me into the true root environment, but into root for the Live CD. I will try it again, with each of the 3 Live CD's, and report back to the list. When I tried to edit one of the configuration files I need to edit, it was a different configuration file, provided by the Live CD. Thanks! Lanny ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Where is the file that sets aliases?
On Monday 10 November 2008 19:31:21 Kai Schaetzl wrote: Anne Wilson wrote on Sun, 9 Nov 2008 09:51:16 +: /root/.bashrc That's exactly what I was looking for, thanks. That was already told very early on, but you didn't notice it! Looking back, I still can't see it, Kai. I remember being told to look in ~/.bashrc. Still, the important thing is that I now know where to look. Anne signature.asc Description: This is a digitally signed message part. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Where is the file that sets aliases?
On Mon, 10 Nov 2008 at 7:42pm, Anne Wilson wrote Looking back, I still can't see it, Kai. I remember being told to look in ~/.bashrc. If you're root (why are you logging in as root?), then ~ *is* /root. -- Joshua Baker-LePain QB3 Shared Cluster Sysadmin UCSF ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Where is the file that sets aliases?
On Monday 10 November 2008 19:45:32 Joshua Baker-LePain wrote: On Mon, 10 Nov 2008 at 7:42pm, Anne Wilson wrote Looking back, I still can't see it, Kai. I remember being told to look in ~/.bashrc. If you're root (why are you logging in as root?), then ~ *is* /root. I wasn't - that's the whole point. That's why I didn't find it. Anne signature.asc Description: This is a digitally signed message part. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Where is the file that sets aliases?
On Monday 10 November 2008 19:56:52 Anne Wilson wrote: On Monday 10 November 2008 19:45:32 Joshua Baker-LePain wrote: On Mon, 10 Nov 2008 at 7:42pm, Anne Wilson wrote Looking back, I still can't see it, Kai. I remember being told to look in ~/.bashrc. If you're root (why are you logging in as root?), then ~ *is* /root. I wasn't - that's the whole point. That's why I didn't find it. I guess that the OP thought I was when he said that, though Anne signature.asc Description: This is a digitally signed message part. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Autodetecing RAID members upon boot... need to update initrd?
Tim Nelson wrote: If my assumptions are correct, the onboard drives are detected first, then the arrays assembled, and after the system has passed control from the initrd to boot, THEN the addon controller is detected and hence the third drive (sdc). If I am correct, then I need to update my initrd for the system to see and use that third drive during the boot process. Can anyone lend a few tips or pointers on how to proceed? I essentially need the sata_sil driver to be included in the initrd. Check the man page for mkinitrd, it's pretty self explanatory. I suggest you back up the existing initrd first, just in case there's a problem. nate ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Linux backup help
Hi All; I'm awaiting a new linux laptop that will be my primary work machine. I want to implement a strategy that allows me as easily as possible to revert back to a former state. My primary concern is a scenario where I apply system updates and it breaks something that for me is critical. I wonder if a simple rsync script would work. If so, here's what I'm thinking: 1) updates are available so I execute the rsync script which pulls any updated files from my laptop to a backup server/drive 2) apply updates 3) if something breaks (even if I can no longer login) I boot the laptop, run the rsync script in the opposite direction (push files from the backup drive to the laptop) I assume that if I were to execute step 3 above that my system would be in the exact state that it was before I ran the updates. Is this a correct assumption ? Are there better approaches ? Thanks in advance.. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Where is the file that sets aliases?
On Mon, 2008-11-10 at 20:11 +, Anne Wilson wrote: On Monday 10 November 2008 19:56:52 Anne Wilson wrote: On Monday 10 November 2008 19:45:32 Joshua Baker-LePain wrote: On Mon, 10 Nov 2008 at 7:42pm, Anne Wilson wrote Looking back, I still can't see it, Kai. I remember being told to look in ~/.bashrc. If you're root (why are you logging in as root?), then ~ *is* /root. I wasn't - that's the whole point. That's why I didn't find it. I guess that the OP thought I was when he said that, though Helped by circumstances. _Normally_, the default install has those aliases only assigned for root, due to the great risk to the system. So it would be a natural assumption. As usual assume has its risks. Anne snip -- Bill ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Autodetecing RAID members upon boot... need to update initrd?
Hello fellow CentOS'ers- I've got a system running CentOS 5.0. The motherboard has two onboard SATA ports with two drives attached. I installed the system on a RAID1 setup. However, I'd like to add a hotspare disk to the array. Since there are no additional SATA ports, I've installed an additional controller. After partitioning, the additional drive was easily and successfully added to the existing array as a spare. However, the problem is when the system boots. The hotspare disk is never detected and added to the array. I believe it could be due to the driver for the addon card not being in the initrd? If I run 'fdisk -l', I see this: ---BEGIN--- Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sda1 * 1 13 104391 fd Linux raid autodetect /dev/sda2 14 523 4096575 fd Linux raid autodetect /dev/sda3 524 60801 484183035 fd Linux raid autodetect Disk /dev/sdb: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sdb1 * 1 13 104391 fd Linux raid autodetect /dev/sdb2 14 523 4096575 fd Linux raid autodetect /dev/sdb3 524 60801 484183035 fd Linux raid autodetect Disk /dev/md2: 495.8 GB, 495803301888 bytes 2 heads, 4 sectors/track, 121045728 cylinders Units = cylinders of 8 * 512 = 4096 bytes Disk /dev/md2 doesn't contain a valid partition table Disk /dev/md1: 12.5 GB, 12584288256 bytes 2 heads, 4 sectors/track, 3072336 cylinders Units = cylinders of 8 * 512 = 4096 bytes Disk /dev/md1 doesn't contain a valid partition table Disk /dev/md0: 106 MB, 106823680 bytes 2 heads, 4 sectors/track, 26080 cylinders Units = cylinders of 8 * 512 = 4096 bytes Disk /dev/md0 doesn't contain a valid partition table Disk /dev/sdc: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sdc1 * 1 13 104391 fd Linux raid autodetect /dev/sdc2 14 523 4096575 fd Linux raid autodetect /dev/sdc3 524 60801 484183035 fd Linux raid autodetect ---END--- If my assumptions are correct, the onboard drives are detected first, then the arrays assembled, and after the system has passed control from the initrd to boot, THEN the addon controller is detected and hence the third drive (sdc). If I am correct, then I need to update my initrd for the system to see and use that third drive during the boot process. Can anyone lend a few tips or pointers on how to proceed? I essentially need the sata_sil driver to be included in the initrd. All tips welcome. Thank you! Tim Nelson Systems/Network Support Rockbochs Inc. (218)727-4332 x105 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Running From Live DVD Keeping Settings Between Boots
Someone posted how to use a memory card (USB or another kind) to save settings between boots of a Live CD/DVD. I believe it was posted not too long ago and I thought I had kept the email, but now that I'm looking for the information, I can not find it. I've done some searching and I either get way too many hits or way too few, none of which are what I'm looking for. Does anyone remember that post and can forward that message to me? Thanks. -- Brent L. Bates (UNIX Sys. Admin.) M.S. 912 Phone:(757) 865-1400, x204 NASA Langley Research CenterFAX:(757) 865-8177 Hampton, Virginia 23681-0001 Email: [EMAIL PROTECTED] http://www.vigyan.com/~blbates/ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Where is the file that sets aliases?
On Monday 10 November 2008 20:30:13 William L. Maltby wrote: Helped by circumstances. _Normally_, the default install has those aliases only assigned for root, due to the great risk to the system. So it would be a natural assumption. As usual assume has its risks. Well, it might have been painful at the time, dealing with this and with the damage on the box after the kernel bug at the same time, but I've learned a good deal, thanks to the patient answers to my questions. Every cloud has a silver lining :-) Anne signature.asc Description: This is a digitally signed message part. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Autodetecing RAID members upon boot... need to update initrd?
I wanted to MaKe and INITRD and you sent me to check out MKINITRD. How thoughtful... :-) Kidding aside, I appreciate the suggestion. I checked it out and simply ran a 'mkinitrd --with=sata_sil /path/to/newinitrd kernel' and rebooted. When grub popped up, I edited the initrd line to reflect the new initrd. It worked like a charm. I've since updated the grub.conf permanently and everything works as expected when rebooted. Thanks again for the pointers. In the future, when upgrading the kernel, will future initrd's be built with my current modules or will I have to manually create new initrd's after each update? Tim Nelson Systems/Network Support Rockbochs Inc. (218)727-4332 x105 - nate [EMAIL PROTECTED] wrote: Tim Nelson wrote: If my assumptions are correct, the onboard drives are detected first, then the arrays assembled, and after the system has passed control from the initrd to boot, THEN the addon controller is detected and hence the third drive (sdc). If I am correct, then I need to update my initrd for the system to see and use that third drive during the boot process. Can anyone lend a few tips or pointers on how to proceed? I essentially need the sata_sil driver to be included in the initrd. Check the man page for mkinitrd, it's pretty self explanatory. I suggest you back up the existing initrd first, just in case there's a problem. nate ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Reinstalled Windows and GRUB - Cannot boot Linux - fstab and grub.conf errors?
On Mon, Nov 10, 2008 at 11:38 AM, Phil Schaffner [EMAIL PROTECTED] wrote: Lanny Marcus wrote: I have several Live CDs, but don't know how to get real root privileges with them. Often su - in a terminal window is all that's required to get root for a live CD. Phil: I'm running on my CentOS 5.2 Live CD, in the belief that one is better able to help me than the Knoppix or SystemRescue Live CDs (the SystemRescue CD is very old). On the GNOME Desktop, there's an Icon for Local Hard Drives. If I double click on that, it shows hda2 which is the /boot ext3 partition (102 MB) There is also an Icon for Local Logical Volumes. If I double click on that, it shows VolGroup00-LogVol00 and everything is there, in the LVM. :-) Here's the result of the mount command [EMAIL PROTECTED] ~]$ mount /dev/mapper/livecd-rw on / type ext3 (rw,noatime) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) tmpfs on /dev/shm type tmpfs (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) /dev/hdc on /mnt/live type iso9660 (ro) /dev/hda2 on /mnt/disc/hda2 type ext3 (ro) /dev/mapper/VolGroup00-LogVol00 on /mnt/lvm/VolGroup00-LogVol00 type ext3 (ro) sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) [EMAIL PROTECTED] ~]$ Question: Is /hda3 mounted properly? I don't think so, because when I try to boot Linux from the Grub menu on the HD, it gives me Error 17: Cannot mount selected partition Here's the contents of fstab (which I'm looking at Read Only) /dev/VolGroup00/LogVol00 / ext3defaults1 1 LABEL=/boot /boot ext3defaults1 2 devpts /dev/ptsdevpts gid=5,mode=620 0 0 tmpfs /dev/shmtmpfs defaults0 0 proc/proc procdefaults0 0 sysfs /syssysfs defaults0 0 /dev/VolGroup00/LogVol01 swapswapdefaults0 0 /dev/hda6 /mnt/win ntfs-3g rw,umask=,defaults 0 0 What I need to modify in fstab is the last line. I need to change it from /dev/hda6 to /dev/hda1 so I can read/write NTFS files from CentOS. If I can get to the 2 configuration files (fstab and grub.conf) with true root access, so I can modify them, with Gedit I should be able to get this box working on Linux again. Not sure of the proper locations to give for those files, so I can get to them from a terminal window, after su -, with gedit. These are the types of trivial problems which cause newbies frustration. On the other hand, there have been times, when my wife and daughter cannot do something on M$ Windows and they can do it on Linux. :-)This would be easier, I'm sure, if my CentOS 5 Installation DVD hadn't gotten damaged Saturday. Your time, help and willingness to share your expertise are much appreciated! Lanny ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Running From Live DVD Keeping Settings Between Boots
On Mon, Nov 10, 2008 at 3:33 PM, Brent L. Bates [EMAIL PROTECTED] wrote: Someone posted how to use a memory card (USB or another kind) to save settings between boots of a Live CD/DVD. I believe it was posted not too long ago and I thought I had kept the email, but now that I'm looking for the information, I can not find it. I've done some searching and I either get way too many hits or way too few, none of which are what I'm looking for. Does anyone remember that post and can forward that message to me? Thanks. I'm running on my CentOS 5.2 Live CD and I just looked at all the GNOME menus. If that's something one can do from the menu, it's not intuitively obvious. If you find out how to do this, please post back to the ML. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Reinstalled Windows and GRUB - Cannot boot Linux - fstab and grub.conf errors?
On Mon, Nov 10, 2008 at 12:58 PM, Lanny Marcus [EMAIL PROTECTED] wrote: Here's the result of the mount command [EMAIL PROTECTED] ~]$ mount /dev/mapper/livecd-rw on / type ext3 (rw,noatime) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) tmpfs on /dev/shm type tmpfs (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) /dev/hdc on /mnt/live type iso9660 (ro) /dev/hda2 on /mnt/disc/hda2 type ext3 (ro) /dev/mapper/VolGroup00-LogVol00 on /mnt/lvm/VolGroup00-LogVol00 type ext3 (ro) sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) [EMAIL PROTECTED] ~]$ Question: Is /hda3 mounted properly? I don't think so, because when I try to boot Linux from the Grub menu on the HD, it gives me Error 17: Cannot mount selected partition When I had this error, it meant that grub could not find the boot partition itself. (The boot PROM did, but grub doesn't see the disks the same way and can get lost.) Someone just answered earlier in this thread that you need to change your hd(0,2) to hd(0,1) on the grub boot line. That should work. You don't need to do this from any special rescue boot, just boot the system, and when the grub stage 2 boot selection shows with its countdown, stop it (with the space bar) and use the grub shell to edit that line and it _should_ boot properly. If WCTW, instead of downloading the CentOS 5 DVD, just pull down the first CD image and burn that. It's a lot shorter than the whole DVD, and it's all you need to get into rescue mode. HTH mhr ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Hwinfo
Phil Schaffner wrote: At the risk of repeating myself - it does build/run on CentOS 5. http://lists.centos.org/pipermail/centos/2008-November/067612.html That is not in dispute. I was responding to the claim that Hwinfo is made for Debian based systems. Why would debian add a patch to get it to build on none-suse systems if its made for debian systems? http://lists.centos.org/pipermail/centos/2008-November/067613.html Regards, Vandaman. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Linux backup help
Kevin Kempter wrote: Hi All; I'm awaiting a new linux laptop that will be my primary work machine. I want to implement a strategy that allows me as easily as possible to revert back to a former state. My primary concern is a scenario where I apply system updates and it breaks something that for me is critical. I wonder if a simple rsync script would work. If so, here's what I'm thinking: 1) updates are available so I execute the rsync script which pulls any updated files from my laptop to a backup server/drive 2) apply updates 3) if something breaks (even if I can no longer login) I boot the laptop, run the rsync script in the opposite direction (push files from the backup drive to the laptop) I assume that if I were to execute step 3 above that my system would be in the exact state that it was before I ran the updates. Is this a correct assumption ? Depends in part on the rsync commands, the file structure, and the order of operations. Restoring over a running system would overwrite files that are in use, particularly in /etc and /var - not a good idea. Restoring from a backup of a live system would restore copies of files that might have been in the process of being changed. Would be safer to do this using a live CD for both the backup and the restore. Would want to do the backup/restore on a per-filesystem basis. Assuming you have / /boot and /home: rsync --archive --delete --hard-links --one-file-system / /backup/laptop/ rsync --archive --delete --hard-links --one-file-system /boot/ /backup/laptop/boot/ rsync --archive --delete --hard-links --one-file-system /home/ /backup/laptop/home/ On restore would need to mount and restore / first, then mount other partitions and restore them. Are there better approaches ? Perhaps using other backup tools (backuppc has been mentioned favorably recently), but it should be workable; however, this sounds like a time/labor-intensive approach every time there are updates, for a low probability of fatal problems with the OS. Just backing up user files would be a lot faster and easier. Phil begin:vcard fn:Philip Schaffner n:Schaffner;Philip org:NASA Langley Research Center;Electromagnetics and Sensors Branch adr:Mail Stop 473;;8 North Dryden Street;Hampton;VA;23681;USA email;internet:[EMAIL PROTECTED] title:Aerospace Technologist tel;work:757-864-1809 tel;fax:757-864-7891 x-mozilla-html:FALSE version:2.1 end:vcard ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Running From Live DVD Keeping Settings Between Boots
Brent L. Bates wrote: Someone posted how to use a memory card (USB or another kind) to save settings between boots of a Live CD/DVD. I believe it was posted not too long ago and I thought I had kept the email, but now that I'm looking for the information, I can not find it. I've done some searching and I either get way too many hits or way too few, none of which are what I'm looking for. Does anyone remember that post and can forward that message to me? Thanks. Unless I'm missing something, you must be remembering another distro. Had some discussions on this during 5.2 live CD testing with Patrice Guay who builds the CentOS live CDs. Knoppix has a feature to save to USB, and Fedora 9 uses persistence to save changes from their live CD, but as of 5.2 CentOS livecd does not implement it. Phil begin:vcard fn:Philip Schaffner n:Schaffner;Philip org:NASA Langley Research Center;Electromagnetics and Sensors Branch adr:Mail Stop 473;;8 North Dryden Street;Hampton;VA;23681;USA email;internet:[EMAIL PROTECTED] title:Aerospace Technologist tel;work:757-864-1809 tel;fax:757-864-7891 x-mozilla-html:FALSE version:2.1 end:vcard ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
RE: [CentOS] Autodetecing RAID members upon boot... need to update initrd?
In the future, when upgrading the kernel, will future initrd's be built with my current modules or will I have to manually create new initrd's after each update? Good question that I would love to know as well. I thought /etc/sysconfig/mkinitrd handled this, but not ripping apart the srpm of a new kernel, I don’t really know if it bothers doing making the initrd. jlc ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Hwinfo
On Sun, 2008-11-09 at 15:46 +0200, jarmo wrote: Has anyone info about package hwinfo for Centos, rhel, fedora? Nice piece of commandline tools. Though not as verbose compared to hwinfo's output (on debian here) I've found lshw (http://dag.wieers.com/rpm/packages/lshw/) very useful. -- Matthew Kent \ SA \ bravenet.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Linux backup help
Kevin Kempter wrote: Hi All; I'm awaiting a new linux laptop that will be my primary work machine. I want to implement a strategy that allows me as easily as possible to revert back to a former state. My primary concern is a scenario where I apply system updates and it breaks something that for me is critical. I wonder if a simple rsync script would work. If so, here's what I'm thinking: 1) updates are available so I execute the rsync script which pulls any updated files from my laptop to a backup server/drive 2) apply updates 3) if something breaks (even if I can no longer login) I boot the laptop, run the rsync script in the opposite direction (push files from the backup drive to the laptop) I assume that if I were to execute step 3 above that my system would be in the exact state that it was before I ran the updates. Is this a correct assumption ? Are there better approaches ? Thanks in advance.. Taking a disk image snapshot with something like clonezilla might be an alternative for you to consider. http://clonezilla.org/ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Running From Live DVD Keeping Settings Between Boots
On Mon, Nov 10, 2008 at 2:10 PM, Phil Schaffner [EMAIL PROTECTED] wrote: Brent L. Bates wrote: Someone posted how to use a memory card (USB or another kind) to save settings between boots of a Live CD/DVD. I believe it was posted not too long ago and I thought I had kept the email, but now that I'm looking for the information, I can not find it. I've done some searching and I either get way too many hits or way too few, none of which are what I'm looking for. Does anyone remember that post and can forward that message to me? Thanks. Unless I'm missing something, you must be remembering another distro. Had some discussions on this during 5.2 live CD testing with Patrice Guay who builds the CentOS live CDs. Knoppix has a feature to save to USB, and Fedora 9 uses persistence to save changes from their live CD, but as of 5.2 CentOS livecd does not implement it. Yet another option is to use Scientific Linux LiveCD/DVD: http://linux.web.psi.ch/livecd/save.html Being a sister product of CentOS, SL might be a viable option for CentOS users. Akemi ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Reinstalled Windows and GRUB - Cannot boot Linux - SOLVED
On Mon, Nov 10, 2008 at 4:32 PM, MHR [EMAIL PROTECTED] wrote: On Mon, Nov 10, 2008 at 12:58 PM, Lanny Marcus [EMAIL PROTECTED] wrote: snip Question: Is /hda3 mounted properly? I don't think so, because when I try to boot Linux from the Grub menu on the HD, it gives me Error 17: Cannot mount selected partition Someone just answered earlier in this thread that you need to change your hd(0,2) to hd(0,1) on the grub boot line. That should work. You don't need to do this from any special rescue boot, just boot the system, and when the grub stage 2 boot selection shows with its countdown, stop it (with the space bar) and use the grub shell to edit that line and it _should_ boot properly. Mark (MHR) and the earlier responder who previously mentioned to change to root (hd0,1) in the GRUB boot menu. A_SPECIAL_THANK_YOU! That got me into CentOS5.2 :-) I did notice an error message, when the box was booting, mounting local filesystems failed but I think that has to do with mounting the NTFS partition, which I will fix in /etc/fstab after I send this message. If WCTW, instead of downloading the CentOS 5 DVD, just pull down the first CD image and burn that. It's a lot shorter than the whole DVD, and it's all you need to get into rescue mode. OK. I will download the first CD, but not tonight, since my CentOS 5 Installation DVD is now toast. I ran into this problem, Saturday afternoon, and the list is very slow on weekends and then our ADSL went down, because there was a bad card in the phone company Router or some other HW in our subdivision. To everyone who replied, THANK YOU! Lanny ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Reinstalled Windows and GRUB - Cannot boot Linux - SOLVED
On Mon, Nov 10, 2008 at 4:32 PM, MHR [EMAIL PROTECTED] wrote: On Mon, Nov 10, 2008 at 12:58 PM, Lanny Marcus [EMAIL PROTECTED] wrote: snip Question: Is /hda3 mounted properly? I don't think so, because when I try to boot Linux from the Grub menu on the HD, it gives me Error 17: Cannot mount selected partition When I had this error, it meant that grub could not find the boot partition itself. (The boot PROM did, but grub doesn't see the disks the same way and can get lost.) Someone just answered earlier in this thread that you need to change your hd(0,2) to hd(0,1) on the grub boot line. That should work. You don't need to do this from any special rescue boot, just boot the system, and when the grub stage 2 boot selection shows with its countdown, stop it (with the space bar) and use the grub shell to edit that line and it _should_ boot properly. If WCTW, instead of downloading the CentOS 5 DVD, just pull down the first CD image and burn that. It's a lot shorter than the whole DVD, and it's all you need to get into rescue mode. All is well now! :-) I corrected the line in /etc/fstab and I can see the NTFS partition. As I expected, changing the line in the GRUB boot menu, as the box was booting, did not survive a reboot. I edited the lines for the 3 Linux Kernels, in /boot/grub/grub.conf and that fixed that problem I knew I had to edit those files, and what MHR (Mark) explained to me tonight, and apparently a poster prior to him, made it *much* easier. I would like to learn how to do things with the Live CD, but as it turns out, I did not need that for this problem and it just added to my frustration. Thanks again, to everyone! ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] bonding theory question
So, I decided to go with mode 6 since my network admin says thats supported at my college. I have everything working perfectly however I still get an occasional packet drop which is not good. http://www.howtoforge.com/network_card_bonding_centos By reading the HOWTO and README.txt I am not sure if I am missing anything else. Has anyone else configured this before? TIA On Sat, Sep 6, 2008 at 2:22 PM, Filipe Brandenburger [EMAIL PROTECTED] wrote: On Sat, Sep 6, 2008 at 13:11, Mag Gam [EMAIL PROTECTED] wrote: Actually, would there be a big performance boost when using mode4? Not necessarily, since balance-rr already gives you load-balancing. They actually implement it differently. balance-rr can spread packets of the same TCP connection across the two links, so you may use your links more, but with the side effect of having your packets delivered out of order. In 802.3ad all packets of a single TCP connection will use the same link, this means your links will not be as balanced as what you get with balance-rr, but it will not require reordering on the other side of the connection. Check section 12.1.1 in /usr/share/doc/iputils-*/README.bonding . In any case, you should evaluate what your needs are and tune for that. Currently I am seeing 95% total throughput. If you have only a few clients doing huge transfers, 802.3ad will probably not be as good as balance-rr for that. Again, you should tune it for your needs. Which isn't that bad. I am peaking at 238MB/sec (each gig/e connections) I believe you mean 238MB/sec on both interfaces, since 1Gbps = 125MB/s. Also, mode0 does fault tolerance, meaning if a switch failure occurs we should still be good, but how would the packets then be transferred? I suppose rr would be disabled since it won't need to alternate, correct? Actually balance-rr is still there, it is only doing round-robin of one interface only. Remember, you could have a bonding of 3, 4 or more interfaces, in that case if you loose one you still have more than one to balance traffic through. Filipe ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Setting up eth0 with address 0.0.0.0
Hello, I'm following instructions in http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.LVS-DR.html#route_on_non_ip_interface to allow my xen guest real hosts to serve virtual IP's behind LVS without having to allocate real public IP addresses for each such xen guest. I have eth1 connected via a back-end switch to the eth1/xenbr1 of the xen host and the other physical servers, this is the interface that is used by LVS to switch packets over to the real servers. I managed to manually do: # ip route add to default-router dev eth0 # ip route add via default-router and before that, in order to allow outgoing packets to be sent via eth0, I did: # ifconfig eth0 0.0.0.0 up and it works great, but when I try to configure this permanently via ifcfg-eth0 it says: Bringing up interface eth0: connect: Invalid argument [ OK ] Things seem to work OK - the server can serve over the Virtual IP, eth0 doesn't have an IP associated with it etc. But I'm worried about this message. Some relevant config files: ifcfg-eth0: To setup the routes, I followed http://www.centos.org/docs/5/html/5.2/Deployment_Guide/s1-networkscripts-static-routes.html and http://www.mail-archive.com/centos@centos.org/msg15253.html and put the following in /etc/sysconfig/network-scripts/route-eth0: DEVICE=eth0 ONBOOT=yes TYPE=Ethernet IPADDR=0.0.0.0 NETMASK=0.0.0.0 route-eth0: to router-address dev eth0 via router-address output of ifconfig eth0: eth0 Link encap:Ethernet HWaddr 00:16:3E:19:E6:97 inet6 addr: fe80::216:3eff:fe19:e697/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2012 errors:0 dropped:0 overruns:0 frame:0 TX packets:250 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:174268 (170.1 KiB) TX bytes:47731 (46.6 KiB) So - did I do this correctly and what should I do to fix the error message? Thanks, --Amos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Rlocate on Centos 5
All, I would like to run Rlocate on centos 5, but i would have to recompile the kernel, which, when reading some posts about custom kernels on centos, is not recommended... Is there another way to get rlocate to work on the stock kernel ? http://rlocate.sourceforge.net/#kernel_configuration -- Test [EMAIL PROTECTED] ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Kernel compilation problems
All, I am trying to build a custom kernel, following the howto and some stuff i found on the forums (mkspec.patch) 1. the mkspec.patch gives an error: [EMAIL PROTECTED] linux]# patch -p1 mkspec.patch (Stripping trailing CRs from patch.) patching file scripts/package/mkspec Hunk #1 succeeded at 103 with fuzz 2 (offset 22 lines). Hunk #2 FAILED at 115. 1 out of 2 hunks FAILED -- saving rejects to file scripts/package/mkspec.rej 2. When i create an rpm out of the standard configfile (/boot/config) the RPM file created is about 100mb which to me seems a bit large...? -- Test [EMAIL PROTECTED] ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
