Discuss October 2013

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179 participants
159 discussions

Sendmail not presenting AUTH option after EHLO
by Chris Boyd 09 Oct '13

09 Oct '13

Hello folks, I have a CentOS 6.4 installation running Sendmail, and after some serious hair tear stare and compare I'm a bit stumped. When I connect to the server either with telnet or SSL, sendmail is not presenting the AUTH capability after an EHLO. Everything looks like it should be working, but no amount of tweaking is getting the AUTH capability advertised (and it doesn't work if you just try it anyway). Here's the config bits from sendmail.mc-- define(`confAUTH_OPTIONS', `A p')dnl define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl Note: Also tried define(`confAUTH_OPTIONS', `A')dnl define(`confAUTH_MECHANISMS', `LOGIN PLAIN')dnl TRUST_AUTH_MECH(`LOGIN PLAIN')dnl just to keep things simple. saslauthd is running, and configured--/etc/sysconfig/saslauthd SOCKETDIR=/var/run/saslauthd MECH=pam FLAGS= /etc/sasl2/Sendmail.conf contains-- pwcheck_method:saslauthd /etc/pam.d/smtp contains-- #%PAM-1.0 auth include password-auth account include password-auth But when I do "openssl s_client -starttls smtp -connect localhost:587" I don't get any AUTH capability-- ehlo localhost 250-pennzoil.gizmopartners.com Hello localhost [127.0.0.1], pleased to meet you 250-ENHANCEDSTATUSCODES 250-PIPELINING 250-8BITMIME 250-SIZE 250-DSN 250-DELIVERBY 250 HELP quit All the certs are built, and if I connect via telnet, the server does advertise STARTTLS. So anyone able to point out the obvious or not so obvious config mistakes?

2 5

VNCserver not starting due to errors
by Gilbert Sebenste 09 Oct '13

09 Oct '13

Hello everyone, Following the directions I found here: http://wiki.centos.org/HowTos/VNC-Server I get to part 2.4, and when I start the vncservice, I get this error message: Starting VNC server: 1:blah Invalid null command. if: Expression Syntax. A VNC server is already running as :1 else: endif not found. [FAILED] If I stop it, and then restart it, I get the same error message. "blah" has been changed for security purposes on this email, but the real name is a valid user. I want to be on window "0", not 1. Any tips or suggestions would be greatly appreciated! Gilbert ******************************************************************************* Gilbert Sebenste (My opinions only!) *******************************************************************************

2 4

CentOS 6.4 Installation on Dell R720
by Kaushal Shriyan 09 Oct '13

09 Oct '13

Hi, I am planning to install CentOS 6.4 on Dell R720 which has hardware raid card and 6 hard disk slots available. I have planned with the below set up :- *2 Hard disks configured in RAID 1 for installing OS * *4 Hard disks configured in RAID 10 for data drive.* Please suggest and recommend if the above approach is correct and let me know if i am missing anything which is crucial to set up a production server. This server will host MySQL DB server. Regards, Kaushal

4 5

"Enterprise Class Hard Drive" - Scam Warning
by Steve Brooks 09 Oct '13

09 Oct '13

Hi All, I know many of us here manage RAID on our Centos based servers so this may be of interest to us all. I ordered three new "Enterprise hard drives" this month from a well known UK online retailer. The drives arrived as new in their anti-static packaging. Before using one of the drives in a mission critical hardware raid I checked the SMART attributes and was amazed at what I saw; see a few of the attributes listed below 1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail - 2600 9 Power_On_Hours 0x0032 098 097 000 Old_age - 2106 12 Power_Cycle_Count 0x0032 100 100 000 Old_age - 80 198 Offline_Uncorrectable 0x0030 196 196 000 Old_age - 398 200 Multi_Zone_Error_Rate 0x0008 180 180 000 Old_age - 4077 So for a brand new packaged drive this was a bit of a surprise. "2106" power on hours, obviously should be zero for a new drive and "398" "Offline_Uncorrectable sectors" this is a well used and faulty drive. I contacted the (very well known) manufacturer of the drive and asked for information on the serial number. I was told the serial number of the drive was region specific to the USA and should not even be in the UK. I opened and tested the second and third drives with similar results. I was told two of the drives had already been returned under warranty and replaced with new drives. Wow... I was also told by the online retailer this is known as a grey import and is not that uncommon.. So it may be a good policy to check the SMART attributes of drives before deployment! Cheers, Steve

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how to find RAID card world wide ID?
by mcclnx mcc 08 Oct '13

08 Oct '13

we have DELL server with PERC RAID card in it. O.S> is CENTOS 5.5. Can anyone tell me how to find SAS address (World wide ID) on RAID card? Thanks.

1 0

boot fails with dracut warning
by g 08 Oct '13

08 Oct '13

greetings, had problems burning a dvd for 6.4, so i burned a livecd and installed it from boot menu to ext4 /dev/sdb3. during install, i defined mounting of /dev/sdb5 as /home and a second partition /dev/sdb6. both are ext4. first boot went well, set up user, rebooted. rebooted level 5, logged in as user, all looked good. rebooted level 5, logged in as root, made changes to /boot/grub/grub.conf to boot other os. rebooted level 5, logged in as user, opened terminal, su to root, tried to 'yum update', all mirrors failed. did not think of trying pings to see if was connected to internet. which could have explained failure. my bad. exited from root, closed terminal, rebooted to other os, logged in as user, opened terminal, pinged several sites, pings returned ok. closed terminal, rebooted, to centos, crashed during level 5 boot. shutdown system, rebooted level 3, boot crashed again. error message; =+=+= ACPI: wmi: Mapper loaded dracut Warning: No root device "block: /dev/disk/by=uuid/dbb9f9c4-8f67- \ 4d79-aaef-4f804f31c800" found dracut Warning: Boot has failed. To debug this issue add "rdshell" to the \ kernel command line. dracut Warning: Signal caught! dracut Warning: Boot has failed. To debug this issue add "rdshell" to the \ kernel command line. kernel Panic - not syncing: Attempted to kill init! Pid: 1, comm: init Tainted: G I-------2.6.32-358.el6.x86_64 #1 Call Trace: [<ffffffff8150cfc8>]? panic+0xa7/0x16f [<ffffffff81073ae2>]? do_exit0x25/0x870 [<ffffffff81182885>]? fput_+0x25/0x30 [<ffffffff81073b48>]? do_group_exit+0x58/0xd0 [<ffffffff81073bd7>]? sys_exit_group+0x17/0x20 [<ffffffff8100b072>]? system_call_fastpath+0x16/x1b Panic occurred, switching back to text console *note1*: block device sought is not shown in /dev/fstab. =+=+= block devices defined in centos /etc/fstab; UUID=16c4f70d-0aff-4760-859c-ecf05e1e025f / ext4 \ defaults 1 1 UUID=e13d224f-d9a3-4697-8693-5395a1477050 /hd/sdb/06 ext4 \ defaults 1 2 UUID=a8f5c9e9-b792-4e30-a80b-08ed8b371886 /home ext4 \ defaults 1 2 UUID=e7c13ca9-3dbc-4cc7-9c6a-50efc0688a61 swap swap \ defaults 0 0 *note2*: block devices listed does not show block device sought during boot. *note3*: block devices are same between different os's. =+=+= i ran a search for; dracut Warning: No root device "block: /dev/disk/by=uuid/ at centos.org only errors show where raid related. another thing that is strange, boot is looking for a device that is not listed in /dev/disk/by-uuid. =+=+= from other os; ]$ ll /dev/disk/by-uuid/ total 0 lrwxrwxrwx. 1 root root 10 Oct 8 07:56 10BDD0693BFCE1E5 -> ../../sdb1 lrwxrwxrwx. 1 root root 10 Oct 8 07:56 16c4f70d-0aff-4760-859c-ecf05e1e025f -> ../../sdb3 lrwxrwxrwx. 1 root root 10 Oct 8 07:56 2FEF848329A39323 -> ../../sda2 lrwxrwxrwx. 1 root root 10 Oct 8 07:56 a8f5c9e9-b792-4e30-a80b-08ed8b371886 -> ../../sdb5 lrwxrwxrwx. 1 root root 10 Oct 8 07:56 AE90166090162F79 -> ../../sda1 lrwxrwxrwx. 1 root root 10 Oct 8 07:56 e13d224f-d9a3-4697-8693-5395a1477050 -> ../../sdb6 lrwxrwxrwx. 1 root root 10 Oct 8 07:56 e7c13ca9-3dbc-4cc7-9c6a-50efc0688a61 -> ../../sdb2 *note4*: sda1 and sdb1 are ntfs and are not included in centos /etc/fstab. *note5*: block devices are same between different os's. =+=+= any and all suggestions welcome. tia. -- peace out. in a world with out fences, who needs gates. tc.hago. g .

1 0

C6: kickstart problems with additional repo
by Rainer Traut 08 Oct '13

08 Oct '13

Hi, I'm kickstarting a vm in ESXi 5.1. ks.cfg is on floppy, install media is ISO file. This works great as long as I don't add an additional repo, in our case it is vmware tools on one of our webservers. If I add the repo line, anaconda asks then for the used network card and indeed, switching to console the interfaces are still unconfigured. Chosing eth0 in gui continues the installation! This is the relevant part of ks.cfg install cdrom lang de_DE.UTF-8 keyboard de-latin1 skipx network --onboot yes --device eth0 --bootproto static --ip=192.168.200.28 --netmask=255.255.255.0 --gateway=192.168.200.1 --nameserver=192.168.200.9 --noipv6 network --onboot no --device eth1 --bootproto static --noipv6 network --onboot no --device eth2 --bootproto static --noipv6 repo --name=vmware51 --baseurl=http://xxx/repo/vmware/5.1/rhel6Server-x86_64/ I'm beginning to think the problem is, my install media is ISO and I have an additional http repo which is not available in this stage... Is there any workaround? Thx Rainer

2 4

How to list openvpn clients?
by Timothy Murphy 08 Oct '13

08 Oct '13

I'm running an openvpn server on a CentOS machine - that is my excuse for posting my query here - and I'm wondering if there is some way of finding all the clients (not just those connected at this moment) who have been registered as clients of the openvpn server? -- Timothy Murphy e-mail: gayleard /at/ eircom.net School of Mathematics, Trinity College, Dublin 2, Ireland

3 4

remote sudo script
by Tim Dunphy 08 Oct '13

08 Oct '13

Hey guys, I'm trying to write a simple bash script that will cp a configuration file to a backup (with the date) remotely to a bunch of machines, using sudo with ssh. I notice that if I run the commands individually, they both work (albeit with some strange output I'd like to suppress): [tdunphy@MIAGRBISSH01V ~]$ ssh -q -t -t -t MIAGRBIORCA00V sudo -S 'cp -v /data/solr-4.3.1/zoe/etc/logback.xml /tmp/logback.xml-${i}-$(date +%Y%m%d).bak' <<EOF > secret_sauce > EOF tcgetattr: Inappropriate ioctl for device `/data/solr-4.3.1/zoe/etc/logback.xml' -> `/tmp/logback.xml--20131007.bak' [tdunphy@MIAGRBISSH01V ~]$ ssh -q -t -t -t MIAGRBIORCA00V sudo -S 'ls -l /home/tdunphy/logback.xml-${i}-$(date +%Y%m%d).bak' <<EOF > secret_sauce > EOF tcgetattr: Inappropriate ioctl for device -rw-r--r-- 1 root root 3372 Oct 7 22:07 /home/tdunphy/logback.xml--20131007.bak The best part of the above is that I am passing my password (secret_sauce - not my real one for obvious reasons) to sudo and having the command executed. One thing I'd like to be able to figure out is how to suppress this message, which is a little distracting and useless to the process: tcgetattr: Inappropriate ioctl for device But more importantly, when I try to pop the above two working statements from the command line into a script, the following occurs: [tdunphy@MIAGRBISSH01V ~]$ for i in MIAGRBIORCA0{0..9}V MIAGRBIORCA1{0..2}V > > do > > ssh -q -t -t -t $i sudo -S 'cp -v /data/solr-4.3.1/zoe/etc/logback.xml /tmp/logback.xml-${i}-$(date +%Y%m%d).bak' <<EOF > secret_sauce > EOF > > ssh -q -t -t -t $i sudo -S 'ls -l /home/tdunphy/logback.xml-${i}-$(date +%Y%m%d).bak' <<EOF > secret_sauce > EOF > > done tcgetattr: Inappropriate ioctl for device `/data/solr-4.3.1/zoe/etc/logback.xml' -> `/tmp/logback.xml--20131007.bak' tcgetattr: Inappropriate ioctl for device -rw-r--r-- 1 root root 3372 Oct 7 22:07 /home/tdunphy/logback.xml--20131007.bak tcgetattr: Inappropriate ioctl for device [sudo] password for tdunphy: For some reason the <<EOF password EOF routine is not working to provide the password to sudo the way I was able to when running the commands individually. Any thoughts on how I should be going about this? Thanks, Tim -- GPG me!! gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B

6 7

CentOS 6.4: Warning! Received an indication that the LUN assignments on this target have changed. The Linux SCSI layer does not automatically remap LUN assignments.
by Trevor T Kates (Services - 6) 08 Oct '13

08 Oct '13

All: ~> uname -srvmpio Linux 2.6.32-358.18.1.el6.x86_64 #1 SMP Wed Aug 28 17:19:38 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux ~> rpm -qa kernel\* | sort kernel-2.6.32-358.18.1.el6.x86_64 kernel-2.6.32-358.el6.x86_64 kernel-devel-2.6.32-358.18.1.el6.x86_64 kernel-devel-2.6.32-358.el6.x86_64 kernel-firmware-2.6.32-358.18.1.el6.noarch kernel-headers-2.6.32-358.18.1.el6.x86_64 My department has several dozen servers using CentOS 6.4 connected to a HP P2000 G3 FC SAN via a Brocade switch. device-mapper-multipath is used to handle the multiple paths to the SAN storage. Our setup has two paths per two redundant controllers/switches. ~> rpm -qa device-mapper\* | sort device-mapper-1.02.77-9.el6.x86_64 device-mapper-event-1.02.77-9.el6.x86_64 device-mapper-event-libs-1.02.77-9.el6.x86_64 device-mapper-libs-1.02.77-9.el6.x86_64 device-mapper-multipath-0.4.9-64.el6_4.2.x86_64 device-mapper-multipath-libs-0.4.9-64.el6_4.2.x86_64 device-mapper-persistent-data-0.1.4-1.el6.x86_64 ~> sudo cat /etc/multipath.conf multipaths { multipath { wwid <redacted> alias <redacted> } } defaults { find_multipaths yes user_friendly_names yes } ~> sudo multipath -ll <redacted> (<redacted>) dm-1 HP,P2000G3 FC/iSCSI size=1.3T features='1 queue_if_no_path' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=130 status=active | |- 2:0:0:12 sdd 8:48 active ready running | `- 1:0:0:12 sdb 8:16 active ready running `-+- policy='round-robin 0' prio=10 status=enabled |- 1:0:1:12 sdc 8:32 active ready running `- 2:0:1:12 sde 8:64 active ready running We're having a problem where syslog on every server connected to the SAN is getting spammed with the following: kernel: sd X:0:0:Y [sdX] Warning! Received an indication that the LUN assignments on this target have changed. The Linux SCSI layer does not automatically remap LUN assignments. None of the LUN assignments of any of the volumes on the SAN have changed since mapping them to the ports connected to each individual server. So far my searches for a solution have turned up dead-ends and if anyone is able to help, I'd greatly appreciate it. Thanks, Trevor T. Kates CONFIDENTIALITY NOTICE: This electronic message contains information which may be legally confidential and/or privileged and does not in any case represent a firm ENERGY COMMODITY bid or offer relating thereto which binds the sender without an additional express written confirmation to that effect. The information is intended solely for the individual or entity named above and access by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution, or use of the contents of this information is prohibited and may be unlawful. If you have received this electronic transmission in error, please reply immediately to the sender that you have received the message in error, and delete it. Thank you.

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Discuss October 2013