Discuss September 2014

discuss@lists.centos.org

182 participants
169 discussions

SAMBA as AD DC
by Sergio Belkin 11 Sep '15

11 Sep '15

Hi folks, Is able SAMBA on CentOS 7 to work as Active Directory Domain Controller? If it's not, what is the recommended way of doing? Compiling from sources? Install packages from SerNet? Thanks in advance! -- -- Sergio Belkin http://www.sergiobelkin.com LPIC-2 Certified - http://www.lpi.org

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Mail Merge data to a pdf file by overlaying the data on the image
by Gregory P. Ennis 07 Jun '15

07 Jun '15

Everyone, I am looking for a utility that I can use to do a mail merge of data to a pdf image file. The image file does not have any active fields, but will be just an image file. I would like to overlay names addresses etc. We currently do this with a pcl file by just overlaying the data with pcl print positions. However, in order to get the pcl file from an original pdf file we have to use gimp to convert the pdf to pcl file, and we always lose a little resolution. I was wondering if anyone knows of a utility to perform this function without first converting the image to a pcl file. Thanks, -- Greg Ennis

4 10

heavy IO load when working with sparse files (centos 6.4)
by Ron E 31 Mar '15

31 Mar '15

Dear List, We have noticed a variety of reproducible conditions working with sparse files on multiple servers under load with CentOS 6.4. The short story is that processes that read / write sparse files with large "holes" can generate an IO storm. Oddly, this only happens with holes and not with the sections of the files that contain data. We have seen extremely high IO load for example copying a 40 or 80gb sparse file that only has a few gigs of data in it. Attempts to lower the io priority and cpu priority of these processes do not make any measurable difference. (ionice, nice) This has been observed with processes such as: cp rsync sha1sum The server does have to be under some load to reproduce the necessary conditions. The cases we have seen involve servers running 10-30 guests under kvm. Load is in acceptable norms when the processes are run, such as load avg 5-15 on a 24 core (12 core with HT enabled) server. We also verify before starting such a process that the spindle with the file we're working on is not being unduly hammered by another process. These servers have one hardware raid controller each (Dell H700 controller with write cache enabled) and multiple raid arrays (separate sets of physical spindles). Interestingly, the IO storm is not limited to the array / spindles where the sparse file resides but affects all IO on that server. We have looked extensively and not found any account of a similar issue. We have seen this on configurations that are 'plain vanilla' enough to think that this is not something specific to our environment. Wondering if anyone else has seen this and if any suggestions on gathering more data / troubleshooting. We wonder if we've found either a raid controller driver issue, an OS issue or some other such thing. What seems to point in this direction is that even with ionice -c3 which should prevent the process from using IO unless the storage is idle, an io storm which appears to saturate the entire raid bus on a given server can occur. Thanks in advance.

3 3

Centos 6.4 on Xserve, IPMI error
by Arno B 31 Mar '15

31 Mar '15

Hello! I'm trying to install Centos 6.4 64 bit on this Xserve: http://www.everymac.com/systems/apple/xserve/specs/xserve-intel-xeon-2.8-ei… I got a bootloader from: http://blog.christophersmart.com/2009/07/23/linux-on-an-apple-xserve-efi-on… as none of the official Centos releases (full, minimal, network 64 bit) boot on this machine. They all crash when loading the bootx64.conf. I have built a USB stick with a working bootx64.efi, grub.cfg, together with an initrd and a vmlinuz from the isolinux folder. These seem to get me into booting a kernel until something called IPMI is starting to throw errors at me: Console: switching to colour frame buffer device 128x48 fb0: VESA VGA frame buffer device ipmi message handler version 39.2 IPMI System Interface driver. ipmi_si 0000:09:00.4: enable device (0002 -> 0003) ipmi_si 0000:09:00.4: PCI INT C -> GSI 16 (level, low) -> IRQ 16 ipmi_si: Adding PCI-specified kcs state machine ipmi_si 0000:09:00.7: enable device (0000 -> 0003) ipmi_si 0000:09:00.7: PCI INT D -> GSI 17 (level, low) -> IRQ 17 ipmi_si: Adding PCI-specified bt state machine ipmi_si: Trying PCI-specified kcs state machine at mem address 0x90841000, slave address 0x0 irq 16 IRQ 16/ipmi_si: IRQF_DISABLED is not guaranteed on shared IRQs Using irq 16 ipmi: Found new BMC (man_id: 0x00003f, prod_id: 0x0003, dev_id: 0x20) IPMI kcs interface initialized ipmi_si: Trying PCI-specified kcs state machine at mem address 0x90840000, slave address 0x0 irq 17 Refined TSC clocksource calibration: 2792.999 MHz. Switching to clocksource tsc IPMI BT: timeout in XACTION [ B_BUSY ] 1 retries left IPMI BT: timeout in XACTION [ B_BUSY ] failed 2 retries, sending error response IPMI: BT reset (takes 5 secs) IPMI BT: timeout in XACTION [ B_BUSY H2B ] failed 2 retries, sending error response IPMI: BT reset (takes 5 secs) IPMI BT: timeout in XACTION [ B_BUSY H2B ] failed 2 retries, sending error response IPMI: BT reset (takes 5 secs) IPMI BT: timeout in XACTION [ B_BUSY H2B ] failed 2 retries, sending error response IPMI: BT reset (takes 5 secs) IPMI BT: timeout in XACTION [ B_BUSY H2B ] failed 2 retries, sending error response IPMI: BT reset (takes 5 secs) then the screen goes to black and the machine doesn't respond to anything anymore... Can anyone please help me with this? Maybe just point me in a direction where to find a solution? I've been googling for a few days now without much results... thanks in advance Arno Beekman

2 1

URGENT! Shellshock fix DOES NOT fix the bug on CentOS 5.4
by Jessica Blank 14 Oct '14

14 Oct '14

Good afternoon! After applying the latest bash RPM listed at http://lists.centos.org/pipermail/centos-announce/2014-September/020594.html : The fixed RPM (bash-3.2-33.el5_10.4.x86_64.rpm) DOES work just fine on CentOS 5.10. However, it DOES NOT work on CentOS 5.4. That is, bash runs fine, but IS STILL VULNERABLE TO SHELLSHOCK! Scary screenie at: http://i.imgur.com/yR7sBjV.png It looks like the released RPM somehow behaves DIFFERENTLY on 5.4 as opposed to 5.10. This has been validated by one of my coworkers; it's apparently not just me. Best, Jessica

19 36

CentOS 7 does not pick up my atheros wireless
by Martes 12 Oct '14

12 Oct '14

Greetings everyone. My recently installed CentOS 7 instance does not enable wireless via Network Manager or otherwise. I have the following output from lspci: lspci |grep AR 08:05.0 Ethernet controller: Qualcomm Atheros AR5212/AR5213 Wireless Network Adapter (rev 01) uname -a Linux imaginationland 3.10.0-123.8.1.el7.x86_64 #1 SMP Mon Sep 22 19:06:58 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux iw --version iw version 3.10 iw -l reports that nl80211 is not found, which is probably the root cause of not having access to the pci device, however, I have no idea why I am unable to access this module. I am unable to get wireless working, however, just prior to uninstalling network manager, I did see it there. I use one of the vms as backup for my personal groupware server which needs to stay active, so I removed network manager, and made sure the configuration for the network and iptables was valid, prior to re-installing network manager. However, after re-installing, Network Manager never sees the wireless device at all. Any assistance would be appreciated. I have not had this type of trouble with linux in quite a few years, and usually if anything I just needed to install the 80211 kernel modules, etc... I am unable to even pull those from repos, on this new install. Respectfully, Martes G Wigglesworth

3 10

Problem with WRT54GL router
by Timothy Murphy 09 Oct '14

09 Oct '14

I have a curious problem with an old WRT54GL router, which I use as a WiFi access point on my LAN: Internet->ADSL modem->CentOS-7 computer->WRT54GL router The router has always had a slight problem of losing connection every so often - it used to be every couple of days, but recently it has become much more often. My cure was always to disconnect the power from the router for 10 seconds or so, and then re-connect it. Recently I discovered that running the following script on the CentOS computer seems to solve the problem (for a while) sudo systemctl restart dhcpd sudo systemctl restart network sudo systemctl restart shorewall (I suspect the first, dhcpd, is irrelevant.) Incidentally, I am able to ping laptops on the LAN (but not the other way round) even when the router is in its "bad" state. I wonder if anyone has had a similar experience, and can offer advice? I don't like to examine the internals of the router, in case it stops working altogether. I'm planning on getting another router (N protocol), so it is not a very serious matter - I'm just puzzled by it. - Timothy Murphy e-mail: gayleard /at/ eircom.net School of Mathematics, Trinity College, Dublin 2, Ireland

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Re: [CentOS] [CentOS-announce] CESA-2014:1326 Moderate CentOS 6 php Security Update
by Leon Fauster 07 Oct '14

07 Oct '14

Am 30.09.2014 um 12:27 schrieb Johnny Hughes <johnny(a)centos.org>: > CentOS Errata and Security Advisory 2014:1326 Moderate > > Upstream details at : https://rhn.redhat.com/errata/RHSA-2014-1326.html > > The following updated files have been uploaded and are currently > syncing to the mirrors: ( sha256sum Filename ) Just curious - are the SCL advisories also communicated via this channel? (linked to https://rhn.redhat.com/errata/rhel-6-rhscl-1-errata.html) Just wondering that upstream did not provide an update for php54 ... -- LF

2 2

Need to Understand booting process of CENTOS-7
by keshab mahapatra 04 Oct '14

04 Oct '14

Team, could some help me understand the booting process of CENTOS-7 I need to have constructive material where i could able present a presentation on booting process of CENTOS-7 With Thanks & Regards, Keshaba Mahapatra Sr.Technical Consultant

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webcam program for continuous recording.
by g 03 Oct '14

03 Oct '14

greetings, i have run into same problem as a friend who bought a logitech c310 webcam. he told me about them being on sale, so i decided to buy one also. the 2 webcam programs that i have installed from repos are 'camorama' and 'cheese'. both work well for single photos, but i can not get 'cheese' to make smooth, continuous video recording. what is recorded is a jerky motion for a few seconds, pause, short record, pause, repeatedly. sometimes, nothing is recorded. i have run several web searches on 'cheese', and tried various solutions, to various similar problems, but have not found any to cure problem i am having. system is an hp x86_64 w/ 2.8GiB memory KDE 4.3.4 ]$ cat /etc/centos-release CentOS release 6.5 (Final) ]$ uname -a 2.6.32-431.29.2.el6.x86_64 #1 SMP Tue Sep 9 21:36:05 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux ]$ cheese --version Cheese 2.28.1 i need to make a video for legal purposes this weekend, so any and all suggestions and recommendations greatly appreciated. tia. -- peace out. in a world with out fences, who needs gates. tc.hago. g .

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Discuss September 2014