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Network FS w/o user setup
by Ted Miller 24 Jun '08

24 Jun '08

Is there a file system + configuration that will let me share a directory, and anyone who has access to something in that directory on the server will also have access (and lack of access) to the same files from the client? Clients will be Centos5, Win2K, WinXP. Server is Centos5. To put it another way, all users have accounts on the server. I don't want to have to set up ANY user information on the server, other than what I set up to control local access. I just want to say "Share /vmware" and have it available, to the same users who can access it locally. With Samba I have to maintain duplicate user lists, password lists, and share access lists. I have not been able to find a clear instructions on how NFS4 handles this, but what I found didn't seem any better than Samba. I don't mind implementing ACLs on the server if it will do what I need, but I can't find anything that says it will save me any work either. Looking for a better way, Ted Miller Indiana, USA

4 15

Mounting Floppies
by Nigel Kendrick 23 Jun '08

23 Jun '08

Hi - daft one for Friday morning coffee break: I have been trying to mount floppies on a couple of CentOS5 servers - the usual "mount /dev/fd0 /mnt/floppy" (yes, /mnt/floppy exists!). On both servers, the mount command just doesn't come back and I have to hit CTRL-C. I have tried different media and also changed the floppy drive on one server, /dev/fd0 is seen as present on both servers and they are enabled in the BIOS. I have formatted and tested the floppies on my desktop PC without problems. In the end, I gave up, stuck a USB floppy on one of the boxes and it mounted with no problems. So is it me, CentOS 5 or something else? (Ideas, anyone!?). It could be a set of duff floppies and three flaky drives (two brand new), but I thought I'd ask before I spend too much more time on it! Thanks Nigel Kendrick

4 10

Awk help
by Joseph L. Casale 23 Jun '08

23 Jun '08

I have csvde dump from active directory I process on my postfix mta. It takes output like this: "CN=Curtis xxx,OU=Domain Users,OU=xxx xxx,DC=xxx-xxx,DC=local",X400:c=US\;a= \;p=xxx xxx xxx\;o=Exchange\;s=xxx\;g=xxx\;;SMTP:Cxxx@xxx-xxx.com and should return a relay_recipient map in the form of: Cxxx(a)xxx-xxx.com OK The command I am using is: cat $1 | tr -d \" | tr , \\n| tr \; \\n | awk -F\: '/(SMTP|smtp):/ {printf("%s\tOK\n",$2)}' Everything up to the awk is working, it drops the smtp: but its putting OK's all over the darn place. Anyone familiar enough with awk and printf that can suggest why this happens? Thanks! jlc

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CentOS tools for public safety
by Rogelio 23 Jun '08

23 Jun '08

A friend of mine from the CentOS community is extremely close to several northern CA fires. http://tinyurl.com/5vp933 http://tinyurl.com/3mk4ah http://tinyurl.com/4jm67 Once things die down (he was evacuated last week), he and I are planning on investigating various CentOS / nix public safety tools for future events like this. Any suggestions in this area would be greatly appreciate. I just recently found out at Sahana, and if there is anything else along those lines, I'd be very grateful.

1 0

3ware 9650 issues
by Joshua Baker-LePain 23 Jun '08

23 Jun '08

I've been having no end of issues with a 3ware 9650SE-24M8 in a server that's coming on a year old. I've got 24 WDC WD5001ABYS drives (500GB) hooked to it, running as a single RAID6 w/ a hot spare. These issues boil down to the card periodically throwing errors like the following: sd 1:0:0:0: WARNING: (0x06:0x002C): Command (0x8a) timed out, resetting card. Usually when this happens, it's followed by: 3w-9xxx: scsi1: AEN: INFO (0x04:0x005E): Cache synchronization completed:unit=0. On the less pleasant occasions, it's followed by: scsi1: ERROR: (0x06:0x0036): Response queue (large) empty failed during reset sequence. 3w-9xxx: scsi1: ERROR: (0x06:0x002B): Controller reset failed during scsi host reset. sd 1:0:0:0: scsi: Device offlined - not ready after error recovery This of course leads to a several hour downtime as the system has to be powered down (not just rebooted) and then the volume needs to be fscked. I've been back and forth with both the vendor and (via the vendor) 3ware with this. The card has been replaced, as well as the whole system. I'm running the latest firmware and drivers from 3ware. Have other folks had good luck with this card? What sorts of configs are you running? I'm in the position of needing more storage, and I'm a bit gun shy on 3ware at the moment... -- Joshua Baker-LePain QB3 Shared Cluster Sysadmin UCSF

10 13

/usr/bin/wc: cannot execute binary file
by Rudi Ahlers 23 Jun '08

23 Jun '08

Hi all I've just installed CentOS 5.1 X64 as a VM in a CentOS 5.1 XEN server, and when I try todo something, I get this error /usr/bin/wc: cannot execute binary file Has anyone seen this before? Google hasn't.... -- Kind Regards Rudi Ahlers CEO, SoftDux Office: 087 805-9573 Fax No: 086 609 6128 Cell: 082 554 7532 Web: http://www.SoftDux.com Forum: http://Forum.SoftDux.com Join SA WebHostingTalk today, on http://www.WebHostingTalk.co.za

2 2

is it possible to login to a switch via RS232 / serial port from the shell?
by Rudi Ahlers 23 Jun '08

23 Jun '08

Hi all I have a problem switch in our data centre, which is connected to a linux server via a serial cable. I know I can / could access the switch from my Windows PC back at the office, using hyperterm, but trying to access it using minicom just doesn't seem to work. I have changed the comms in minincom to use /dev/tty0 & the baud rate to 9600, yet I can't seem to connect with minicom. Does anyone know how to connect to a serial device from the console? -- Kind Regards Rudi Ahlers CEO, SoftDux Office: 087 805-9573 Fax No: 086 609 6128 Cell: 082 554 7532 Web: http://www.SoftDux.com Forum: http://Forum.SoftDux.com Join SA WebHostingTalk today, on http://www.WebHostingTalk.co.za

10 26

Centos on eeePC
by wonderer 23 Jun '08

23 Jun '08

Hello all, Are there any experiences for CentOS 5 on one eeePC of Asus? Is to be considered here something? I consider myself as secondary equipment one eeePC 900 to add (here in Germany unfortunately at present only with Windows at this time). Did someone already gain experiences with one of the predecessor models here? sincerly Henrik

3 2

Re: [CentOS] lvm with iscsi devices on boot
by Ross S. W. Walker 23 Jun '08

23 Jun '08

Excellent! Glad it's working for you. -Ross ----- Original Message ----- From: centos-bounces(a)centos.org <centos-bounces(a)centos.org> To: CentOS mailing list <centos(a)centos.org> Sent: Sun Jun 22 04:09:59 2008 Subject: Re: [CentOS] lvm with iscsi devices on boot On Fri, Jun 20, 2008 at 1:04 AM, Ross S. W. Walker <RWalker(a)medallion.com> wrote: > I think the key here is to add the _netdev option in fstab for > those filesystems over iSCSI, even using LVM. I got a chance to reboot the server this weekend and happy to report that my iscsi/multipath/lvm volumes are discovered and automatically mounting on boot. It worked! Thanks :-) - Raja _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.

1 0

Migrating from RHEL to Centos
by Hemraj S 23 Jun '08

23 Jun '08

Hi, I m currently running my production servers on RHEL 4.6 & would like to migrate to Centos4.6 as it has more benefits & advantages. I looked at the Centos release notes available at http://mirror.centos.org/centos/4.6/os/i386/RELEASE-NOTES-en.html and understood that the basic difference between RHEL & Centos are look/feel related & binaries,functionalities are almost same. But when i compared the sysctl values of RHEL4.6 with Centos4.6, i found that there are lot of differences in the parameter values. Now my question is: 1) Just like sysctl difference, is there any other difference between RHEL & Centos which could vary the performance & needs to be taken care during migration. 2) When the Centos packages are built, are they built with the same configuration as in RHEL or is there any difference. Thanks & Regards, Hemraj

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