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Re: [CentOS] CentOS 5 and Broadcom wireless
by David G. Miller 11 May '07

11 May '07

"Bart Schaefer" <barton.schaefer(a)gmail.com> wrote: > Is wpa_supplicant installed? > > > It is, and I tried enabling it as well, but it spews a bunch of errors > at boot time and exits. It's apparent I need to edit > /etc/sysconfig/wpa_supplicant, but if I'm *not* using ndiswrapper I > don't know what to use in the DRIVERS= assignment. So that's > chkconfig'd off again. Try: DRIVERS=wext This actually worked better for me than DRIVERS=ndiswrapper when I use ndiswrapper. I think it tells wpa_supplicant that the kernel driver supports the generic wireless extensions. As an example, I can get WPA-PSK authentication to work with DRIVERS=wext but not with ndiswrapper even though I'm running ndiswrapper. I also did some googling and it looks like quite a bit of bcm43xx work has gone into kernels after 2.6.18. No idea if these changes have been back ported by upstream to the current 2.6.18 kernel. I have some friends visiting now but I'm planning on giving bcm43xx a whirl again with the 2.6.21 kernel. Cheers, Dave -- Politics, n. Strife of interests masquerading as a contest of principles. -- Ambrose Bierce

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STRANGE MOUSE POINTER BEHAVIOUR - CENTOS-5
by Chris Geldenhuis 11 May '07

11 May '07

Hi All, I have done a fresh install of CentOS-5 (64bit) from CD's downloaded and sha1sum checked. The install is a minimal version with KDE and XEN - to use as DOM0. However when booting up and logging in the mouse pointer appears as normal. Once in the Graphical screen the pointer disappears. The mouse does work as you can see changes in the icons on the screen when moving in around and if you click on an icon it opens. I have tried various setting for the mouse pointer but nothing makes it visible. Any pointers ? TIA ChrisG

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RE: [CentOS] Disable window scaling during kickstart
by Plant, Dean 11 May '07

11 May '07

Ray Van Dolson wrote: > On Thu, May 10, 2007 at 07:04:51PM +0100, Plant, Dean wrote: >> Weird... Tell me about it, I spent a lot of time head scratching >> trying to figure out why network connections would just mysteriously >> hang. Eventually found reference to a problem with >> tcp_window_scaling and firewalls and after disabling >> tcp_window_scaling on my test CentOS 5 box, everything started >> working. >> >> The install does not get far enough for the shell console to be >> available, it hangs at the transferring stage2.img. >> > > Ah, probably before %pre even has run (?) Well you could rebuild the > kernel on the install CD to disable window scaling by default. :) Ok, > not a particularly useful option... maybe someone else will have a > suggestion. > > In HP-UX you can pass kernel parameters at boot-time, I wonder if > anything similar could be done? Probably not. > > Have you captured a tcpdump of what happens when the "freeze" occurs > with an intermediary system? Maybe a setting could be changed on your > switch? Although I would doubt the switch would be a factor. Are > your packets going through an intermediary router? > > I plan to do some network installs of CentOS 5 soon, will be > interesting to see if this issue occurs. > I don't think this is a issue with CentOS/RHEL. The kickstart in this instance is passing through a firewall appliance, which I think is Open/FreeBSD based and we now believe is breaking tcp window scaling. It seems that CentOS3&4 was unaffected by this but with v5 network connections hang after transferring about 500k. On a network that does not pass through this firewall v5 works as expected. Dean

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centos5 cifs/autofs
by Mark Farmer 11 May '07

11 May '07

Hi all I am trying to use the cifs module to mount a share from a win2k3 server but I am getting the following error in /var/log/messages - the filesystem does mount but i'm having other issues accessing the data from our web based app. Can anyone explain why I get this error please? Indeed the file mount_cifs.so does not exist on the machine. automount[31080]: open_mount: (mount):cannot open mount module cifs (/usr/lib/autofs/mount_cifs.so: cannot open shared object file: No such file or directory) -- Mark Farmer RHCT Registered Linux User 353158 farmorg(a)gmail.com

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Re: [CentOS] CentOS 5 ssloooowww when network unavailable
by Brent L. Bates 11 May '07

11 May '07

Do not forget to double check the /etc/nsswitch.conf file too. The line that starts with `hosts:' should have `files' listed first and `dns' last. If you use NIS, `nis' should be after `files', but before `dns'. -- Brent L. Bates (UNIX Sys. Admin.) M.S. 912 Phone:(757) 865-1400, x204 NASA Langley Research Center FAX:(757) 865-8177 Hampton, Virginia 23681-0001 Email: B.L.BATES(a)larc.nasa.gov http://www.vigyan.com/~blbates/

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CentOS-announce Digest, Vol 27, Issue 7
by centos-announce-request＠centos.org 11 May '07

11 May '07

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-2007:0336 Moderate CentOS 5 x86_64 postgresql - security update (Johnny Hughes) 2. CESA-2007:0348 Important CentOS 5 i386 php - security update (Johnny Hughes) 3. CESA-2007:0348 Important CentOS 5 x86_64 php - security update (Johnny Hughes) 4. CESA-2007:0336 Moderate CentOS 5 i386 postgresql - security update (Johnny Hughes) 5. CESA-2007:0346 Moderate CentOS 5 x86_64 vim- security update (Johnny Hughes) 6. CESA-2007:0346 Moderate CentOS 5 i386 vim- security update (Johnny Hughes) 7. CESA-2007:0338 Moderate CentOS 3 ia64 freeradius - security update (Pasi Pirhonen) 8. CESA-2007:0338 Moderate CentOS 4 ia64 freeradius - security update (Pasi Pirhonen) 9. CESA-2007:0338 Moderate CentOS 3 i386 freeradius - security update (Tru Huynh) 10. CESA-2007:0338 Moderate CentOS 3 x86_64 freeradius - security update (Tru Huynh) 11. CESA-2007:0338 Moderate CentOS 3 s390(x) freeradius - security update (Pasi Pirhonen) 12. CESA-2007:0338 Moderate CentOS 4 s390(x) freeradius - security update (Pasi Pirhonen) ---------------------------------------------------------------------- Message: 1 Date: Thu, 10 May 2007 09:29:34 -0500 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CESA-2007:0336 Moderate CentOS 5 x86_64 postgresql - security update To: CentOS-Announce <centos-announce(a)centos.org> Message-ID: <1178807374.4716.55.camel(a)myth.home.local> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory 2007:0336 https://rhn.redhat.com/errata/RHSA-2007-0336.html The following updated files have been uploaded and are currently syncing to the mirrors: x86_64: postgresql-8.1.9-1.el5.x86_64.rpm postgresql-contrib-8.1.9-1.el5.x86_64.rpm postgresql-debuginfo-8.1.9-1.el5.x86_64.rpm postgresql-devel-8.1.9-1.el5.i386.rpm postgresql-devel-8.1.9-1.el5.x86_64.rpm postgresql-docs-8.1.9-1.el5.x86_64.rpm postgresql-libs-8.1.9-1.el5.i386.rpm postgresql-libs-8.1.9-1.el5.x86_64.rpm postgresql-pl-8.1.9-1.el5.x86_64.rpm postgresql-python-8.1.9-1.el5.x86_64.rpm postgresql-server-8.1.9-1.el5.x86_64.rpm postgresql-tcl-8.1.9-1.el5.x86_64.rpm postgresql-test-8.1.9-1.el5.x86_64.rpm src: postgresql-8.1.9-1.el5.src.rpm

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New Centos User - Yum Repositories Question
by Dave Cross 11 May '07

11 May '07

I've been using Red Hat and its derivatives since RH4.2. I use Fedora Core 6 for all of my desktop machines, but I decided to go for Centos 5 for my new colo web server. So I've just taken delivery of a new Centos 5 virtual server from Bytemark (http://bytemark.co.uk/) and I'm trying to get it set up with all the RPMs that I'm used to from FC6. As I understand it, the Centos Extras repository at http://centos.karan.org/ is the equivalent of Fedora Extras, so I've downloaded and installed the *.repo file from that site. But I still don't seem to have access to all of the RPMs that I was hoping for. I was particularly looking for the Perl CPAN modules that are part of Fedora Extras. Very few of those seem to be available. Am I just too early? Is the Centos Extras repository not quite ready for Centos 5 yet? Or is there a technical reason why the Fedora Extras RPMs can't be rebuilt for Centos? Or do I need to configure yum for a different repository? if I have to rebuild the RPMs myself, then I'm quite happy to do that. I just wondered if they would become available automatically if I waited a while. There's no real hurry to get this server up. Cheers, Dave...

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adsl-set up (solved)
by gary 11 May '07

11 May '07

A few days ago I wrote complaining that my new, cheap Compaq Presario (sr5010nx) could not create and maintain a dsl connection using Centos5. I was puzzled that that Ubuntu - with pppoeconf - would work just fine but Centos5 could not be configured. (cento4 -also) Eventually I googled and found a bug report for the r8169 Gigabit ethernet driver. Conclusion - there is a patch in new kernels - I tried the Centos 2.6.18 kernel - again no results - and finally I installed a fc6-2.6.20 kernel - problem solved. -----------------gary

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Re: [CentOS] Suggestions for partition
by alfred＠von-campe.com 11 May '07

11 May '07

[Repost - for some reason my reply from earlier this morning did not go through] Thanks everyone for all your suggestions/comments. >Ask yourself this question: Does the company loose money when the build system >is down for restore? How much? How long does a restore take? No, no money lost. If I keep a spare drive, it should take less than an hour to restore the system. > Mirroring disks is not a replacement for backup. It is a way to improve > availability of a system (no downtime when a disc dies), so it might even be > interesting when there is no important data on the machine. If this is > important for you use RAID-1 for the entire discs. I would waste the most disk space, but this is certainly a possibility. > If decreased availability is not a problem for you (you can easily afford a > day of downtime when a disc dies) use RAID-0 for the entire discs. It will > give you a nice performance boost. Especially on a build host people will > love the extra performance of the disc array. But if either disk dies, the whole system is unusable. I don't think I will use this option. > A combination of RAID-0 and RAID-1 may also be an option: Make a small RAID-1 > partition for the operating system (say 20GB) and a big RAID-0 partition for > the data. This way you will get maximum performance on the data partition, > but when a disc dies you do not need to reinstall the operating system. Just > put in a new disc, let the RAID-1 rebuild itself in the background and > restore your data. This can reduce the downtime (and the amount of work for > you) when a disc dies considerably. Hmm, this sounds like a possibility. I have to figure out how to do this (I haven't used HW RAID before). > HW vs SW RAID: Kind of a religious question. HW has some advantages when using > RAID-5 or RAID-6 (less CPU load). When using RAID-0 or RAID-1 there should > not be any difference performance wise. HW RAID gives you some advantages in > terms of handling, i.e. hotplugging of discs, nice administration console, > RAID-10 during install ;-), etc. It's up to you to decide whether it is worth > the money. Plus you need to find a controller that is well supported in > Linux. Does anyone know if the RAID controller that comes in an IBM x3550 is supported on CentOS 4 & 5? I assume that it is. > P.s. Putting lots of RAM into the machine (for the buffer cache) has more > impact than RAID-0 in my experience. Of course that depends on your > filesystem usage pattern. The system has 4GB. > P.p.s. Creating one swap partition on each disc is correct, because swapping > to RAID-0 is useless. Only if you decide to use RAID-1 for the whole disc you > should also swap to RAID-1. Will do. > Three raid1 sets: > > raid1 #1 = / > raid1 #2 = swap > raid1 #3 = rest of disk on /home > > for the simple fact that a dead disk won't bring down your system and halt your > > builds until your rebuild the machine. Yes, I like that. > But if you really only care about max speed and are not worried about crashes & > > their consequences, then replace the raid1 with raid0. I like the earlier suggestions on combining RAID0 and RAID1. > I have no reason for using LVM on boot/OS/system partitions. If I have something > > that fills the disk that much, I move it to an other storage device. In your case, > striped LVM could be used instead of raid0. That's why I can't decide what the best approach is. So many different ways to skin this cat. Thanks, Alfred

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centos4 server, centosplus and perl update
by Abba Communications - www.abbacomm.net 11 May '07

11 May '07

Greetings One production box we have deployed is a yum current centos 4.4 Im thinking we should move to perl 5.8.8 in regards to Spamassassin among some other items... Would someone please tell me from experience if do the command below of yum --enablerepo=centosplus update perl* Q: will I get everything I need for this exercise or should I be looking to get some other supporting packages from the centosplus repo as well? Thanks and kind regards, - rh -- Abba Communications Spokane, WA www.abbacomm.net

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