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Creating a USB bootable modified netinstall ISO image
by Alfred von Campe 03 Dec '14

03 Dec '14

I’ve been creating slightly modified CentOS netinstall ISO images using the following steps: Copy contents of CentOS netinstall ISO image to a temporary directory Edit isolunux/isolinux.cfg file Create new ISO image using the following command: mkisofs -o new.iso -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -R -J -v -T /tmp/iso I’ve been using that command for many years and found it in the RHEL 5 documentation I believe. Anyway, so far, so good. If I burn a CD from this new ISO image I can boot from it and get the modified menu as expected. However, if I use dd to copy this ISO image to a USB stick, It’s not bootable. Using the exact same dd command with the original CentOS ISO image produces a bootable USB stick. Any idea why my modified ISO image is not bootable when copied to a USB stick? Alfred

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partedmagic connecting to a comcast address
by g 03 Dec '14

03 Dec '14

i have been noticing a short connection burst in system monitor every time i connect to internet. i got curious and decided to run wireshark to see what was happening. seems that i am connecting to 96.195.141.178 with destination of "PartedMagic". this seemed strange because i do not have PartedMagic installed, so i ran a 'whois' check. this is what it showed: IP Location United States United States Pittsburgh Comcast Cable Communications Llc ASN United States AS7922 COMCAST-7922 - Comcast Cable Communications, Inc.,US (registered Feb 14, 1997) Resolve Host m001dd684d074.pitt1.pa.comcast.net Whois Server whois.arin.net IP Address 96.195.141.178 NetRange: 96.192.0.0 - 96.223.255.255 CIDR: 96.192.0.0/11 NetName: COMCAST-VOIP-4 NetHandle: NET-96-192-0-0-1 Parent: NET96 (NET-96-0-0-0-0) NetType: Direct Allocation OriginAS: Organization: Comcast Cable Communications, LLC (CCCS) is this something for concern? if so, what is/are best way/s to track this down? any and all help / suggestions are much needed and appreciated. thank you. -- peace out. in a world with out fences, who needs gates. tc,hago. g .

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Building QT on CentOS 5
by Wade Hampton 03 Dec '14

03 Dec '14

I am building QT 4.8.6 on CentOS 5 and it is failing on building the webkit module with __sync_add_and_fetch_4 not being defined. My build is for Embedded Linux, which allows me to use the framebuffer. Posts report this error when trying to cross-compile for ARM, but I am building for X86. Several posts also indicate that this is due to the old GCC used by CentOS 5. Does anyone have any suggestions? Thanks, -- Wade Hampton

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Help with at Bash script
by James B. Byrne 03 Dec '14

03 Dec '14

I am attempting to get a script borrowed from DJB to work on my CentOS-6.6 box. Simplified it looks like this: tcpdump -l -n -e port 53 \ | awk '{if ($14 ~ /A.*?/) print $15}' \ | while read domain ; do echo $domain ; done ; The sticking point is the 'while read' construct. Run just as 'tcpdum | awk' I get this: english.stackexchange.com. www.urbandictionary.com. www.urbandictionary.com. www.urbandictionary.com. www.urbandictionary.com. api.mywot.com. a.udimg.com. a.udimg.com. fonts.googleapis.com. . . . Run with the 'while read $domain ; do echo ' pipe nothing appears whatsoever. What am I doing wrong? -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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CentOS-announce Digest, Vol 118, Issue 2
by centos-announce-request＠centos.org 03 Dec '14

03 Dec '14

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. CEBA-2014:C004 CentOS 7 ipa BugFix Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Tue, 2 Dec 2014 17:47:50 +0000 From: Johnny Hughes <johnny(a)centos.org> To: centos-announce(a)centos.org Subject: [CentOS-announce] CEBA-2014:C004 CentOS 7 ipa BugFix Update Message-ID: <20141202174750.GA43921(a)n04.lon1.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2014:C004 Upstream details at : https://rhn.redhat.com/errata/RHBA-2014-1828.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) x86_64: f373d3e21421f9a9f35c33582327ac8366bfb9b3753bbd1b353d75aeadb97a8b ipa-admintools-3.3.3-28.0.1.el7.centos.3.x86_64.rpm f59a39764e2390d0e9274236b167aab61fa3b324dafb26b6067ad1b7d57baa82 ipa-client-3.3.3-28.0.1.el7.centos.3.x86_64.rpm b280d818e3dfa57c4e86a3bfbd1113450df3ac0a1cba4bb808e5aa051cb95b52 ipa-python-3.3.3-28.0.1.el7.centos.3.x86_64.rpm 8118f8f2d2c0867ca14bc5b06e3a8c7f1dd8f4654e5ace17621c57b262d2f669 ipa-server-3.3.3-28.0.1.el7.centos.3.x86_64.rpm 6d1acb05d7af677fb0a11cc5106cd7e4e26bf763f7b6935b564f0bdd100a3991 ipa-server-trust-ad-3.3.3-28.0.1.el7.centos.3.x86_64.rpm Source: 7de16e077d7fc8f6c74f1d3c88a4b8b44a107d26e4897e3f2e60272baa4574b6 ipa-3.3.3-28.0.1.el7.centos.3.src.rpm NOTE: This is a re-release of the above packages to remove subscription manager as an install requirement. See CentOS Bug: http://bugs.centos.org/view.php?id=7266 -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 118, Issue 2 ***********************************************

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Re: [CentOS] CentOs 7.0 and reboot failure
by Gregory P. Ennis 03 Dec '14

03 Dec '14

On Tue, 2014-12-02 at 16:32 -0600, Gregory P. Ennis wrote: > On Tue, 2014-12-02 at 20:23 +0000, Ned Slider wrote: > > On 02/12/14 18:34, Gregory P. Ennis wrote: > > > On Mon, 2014-12-01 at 18:50 +0000, Ned Slider wrote: > > >> On 01/12/14 18:36, Gregory P. Ennis wrote: > > >>> On Thu, 2014-11-27 at 22:04 -0600, Gregory P. Ennis wrote: > > >>>> On Thu, 2014-11-27 at 18:50 -0600, Gregory P. Ennis wrote: > > >>>>> Date: Sun, 23 Nov 2014 13:50:17 -0600 > > >>>>> > > >>>>> On Sun, 23 Nov 2014 13:07:47 -0600 > > >>>>> Gregory P. Ennis wrote: > > >>>>> > > >>>>>> I also changed the boot level to 5. > > >>>>> > > >>>>> Do you mean the runlevel? If so, are you sure that you changed it correctly? > > >>>>> > > >>>>> Centos 7 doesn't use runlevels set in inittab like previous versions did. I see that fact is actually noted in /etc/inittab, along with the expected way to do it. > > >>>>> --------------------------------------------------------------------------------------------- > > >>>>> > > >>>>> Frank, > > >>>>> > > >>>>> Yes, you are correct, I changed the run level and not boot level to 5 > > >>>>> and did so by using the command : > > >>>>> > > >>>>> ln -sf /lib/systemd/system/graphical.target /etc/systemd/system/default.target > > >>>>> > > >>>>> Also, I appreciate everybody's input on this, but I am still at a loss > > >>>>> as to how to fix this. Without being able to reboot, it sure makes the > > >>>>> set up difficult. > > >>>>> > > >>>>> Does anyone else have any ideas?? > > >>>>> > > >>>>> Greg > > >>>>> > > >>>> > > >>>> I have tried some additional changes that have not made a difference. > > >>>> > > >>>> I disabled selinux - that made no difference > > >>>> I stopped and disabled firewalld - that made no difference. > > >>>> > > >>>> I can boot this machine after I turn it off and then back on, but when I > > >>>> try to do a shutdown now -r, the system hangs right after picking the OS > > >>>> that is desired "CentOS Linux..........". > > >>>> > > >>>> After the machine is turned off the boot process occurs normally after > > >>>> this choice and I get two penguins in the upper left hand corner, and > > >>>> the boot proceeds. When I do a shutdown now -r, I do not get to the > > >>>> penguins and the machine hangs forever until I either unplug it or press > > >>>> the power button for 5 seconds. > > >>>> > > >>>> Any help would be appreciated!!! > > >>>> > > >>>> Greg > > >>>> > > >>> ----------------------------------------------------------- > > >>> > > >>> Everyone, > > >>> > > >>> I did not get much of a response on the list so I filed a bug report. I > > >>> wanted to document the bug report for anyone else that is having a > > >>> reboot problem. > > >>> > > >>> https://bugs.centos.org/view.php?id=7949 > > >>> > > >>> > > >>> Greg Ennis > > >>> > > >> > > >> Seems little point in filing a bug report when you have no idea what the > > >> issue is. Bugs are not a means of troubleshooting nor a support forum. > > >> However, you did get my attention so lets see if we can stimulate some > > >> further interest in troubleshooting this. > > >> > > >> So the system will perform a cold reboot, but not a warm reboot. Sounds > > >> like a hardware issue to me. > > >> > > >> Any clues in /var/log/messages ? > > >> > > >> Tried updating the BIOS? > > >> > > >> Any hardware firmwares being loaded? > > >> > > >> > > >> _______________________________________________ > > > > > > Ned, > > > > > > Thanks for your response!!! > > > > > > Sorry, if posting a bug report was the wrong venue !!! > > > > > > There are no messages in the message logs that I could identify as > > > problems, but the system fails before the OS is active. > > > > > > I have not updated the BIOS, and do not know how to do this... but this > > > is my testing machine so I am more than open to doing this. I am using > > > a Gateway SX2855-UB12P. I will take a look at the Gateway site; if > > > there are tutorials you could point me to I would appreciate it. > > > > You'd have to check the Gateway website to see if a bios update is > > available to download for your model. Instructions are normally included > > / available. > > > > > > > > The only hardware that has been added has been a usb ethernet connection > > > so that I have the motherboard nic card and the usb nic connection. > > > > > > Just to eliminate the easy option first, does unplugging the USB > > ethernet adapter (before rebooting) solve the problem? > > > > > > > wanted to use this setup to test the firewalld capabilities for a > > > network gateway. The machine does not have a monitor, and is without a > > > mouse or keyboard. > > > > > > It should be noted that this machine previously had CentOS 6 with a 3T > > > Seagate drive that worked without a problem, but recently developed a > > > disc failure. I replaced the drive with a 4T WesternDigital drive and > > > installed CentOs 7.0 from a DVD. > > > > > > > I wouldn't think the drive swap would make a difference. > > > > > Thanks again for your help!!! > > > > > > Greg > > > > > > ------------------------- > Ned, The USB ethernet adapter was a good thought, but removing it did not make a difference. I removed the adapter, rebooted with same failure, then manually turned off system and did a boot with the adapter unplugged, then did another reboot which had the same failure. It does not look like the adapter is the problem. I will take another look at the Gateway website. First search attempt did not result in anything productive, that is why I looked at the American Megatrends site which had a bios download tool, but it was for a windows machine. I am going to continue to look, I think my best choice would be to take another look at Gateway site. This machine worked perfectly under CentOS 6, I can still use it with CentOS 7, but it is a real pain to reboot. Greg

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Selinux logging and reporting in centos 7
by Joseph L. Casale 03 Dec '14

03 Dec '14

Seems odd the stock logwatch polls for audit data in messages while the stock config has that data sent to /var/log/audit/audit.log? Not sure why that doesn't have a distro specific override... So on that premise, what are people using for reports on headless c7 instances without a gui? Anything better than logwatch worth investigating? Thanks, jlc

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Re: [CentOS] NetworkManager fights with DHCP-only backup NIC
by James B. Byrne 02 Dec '14

02 Dec '14

On Mon, December 1, 2014 16:48, Les Mikesell wrote: > > Is there anyone who has more than a few boxes at more than one > location who _doesn't_ have this issue? I'd like to see a FAQ or > something by whoever designed the network configuration system about > how they planned for it to work (with and without GUI availability). > Likewise for what is supposed to happen when you restore a backup onto > different hardware. > Think 'laptop'. -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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NetworkManager fights with DHCP-only backup NIC
by Warren Young 02 Dec '14

02 Dec '14

We ship servers to remote sites, which are rarely staffed with techs familiar with Linux. We have them tell us the static IP configuration for the box before we ship it, then we set it up for them here and ship it out to the site, where they just plug it in, turn it on, and walk away. That’s the ideal, anyway. What often happens in reality is either: 1. They give us incorrect static IP info, so the box arrives and won’t connect to the Internet, which means we often have to arrange to get someone clueful on-site to fix it. 2. The site is in the middle of some major deployment, a small piece of which is our server, so the LAN isn’t ready, but they demand the box be shipped early anyway for some handwavy business reason. "No, we can’t tell you what static IP to use," they say. "Just configure it on-site," they say. Sigh. Since these systems have 2+ Ethernet ports and we really only need one in normal operations, we’ve taken to configuring the second one for DHCP, so that they can just move the cable from the primary port to the secondary. This works fine in CentOS 5: DHCP comes up and takes over, giving us the access we need to fix/configure the static IP on the primary port. What happens in CentOS 7 depends on whether you plug in one cable or two: 1. If you plug in only one cable, NetworkManager sees that the static interface is unplugged, so it *helpfully* moves that IP to the secondary NIC, apparently on the assumption that static is always better than DHCP. This is of no use to us, since all it does is move the problem to the other NIC. 2. If you plug both cables in, both interfaces come up configured as you’d expect, but since both configurations provided a gateway address, you still can’t get out to the Internet since the static one came up first, and it’s pointing at an unreachable box. I think all we need to do to fix this is convince NetworkManager not to be clever about moving the static IP to the second NIC. Alas, there is no checkbox in the NM GUI labeled “This is a 4U server, dummy, not a laptop.” Anyone know how to convince NM to obey the MAC binding in the ifcfg-* file, to prevent NM from moving the broken static IP info to the second NIC? Yes, we know we can still disable NetworkManager and edit network-scripts/ifcfg-* directly. We’d just prefer not to fight the OS. Also, unlike EL6, disabling NM on EL7 breaks the network GUI, which we’ve occasionally found helpful, as when we have a semi-clueful tech at the remote site.

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CentOs 7.0 and reboot failure
by Gregory P. Ennis 02 Dec '14

02 Dec '14

Everyone, I have installed Centos 7.0 on my homework machine in order to take a test drive with it, and am low on the learning curve with it at this point. I have a small Gateway SX2855-UB12P. I have a critical hurdle in that when I try a reboot or when I do a 'shutdown now -r' command the system will start a reboot process but hangs right after the os choices are presented. My install process started with the server version, and I added the gnome desktop latter. I also changed the boot level to 5. Has anyone else had this problem, or any suggestions as to a remedy. Thanks, Greg Ennis

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