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34758 discussions

CentOS7 and "ip link alias"
by Mike - st257 09 Nov '15

09 Nov '15

Hello List, After demystifying the cause for my /sbin/ifup-local not being executed by network scripts for an Ethernet interface (don't let NetworkManager control it or ifup-local won't be executed)... ... I have a question with hopefully a simple answer: I placed an alias/description on my interface during testing and now I want to remove it. But when I try to remove it, I'm either trying to do something _actually_ not supported or I don't have the proper syntax to accomplish what I want. ~]# ip link set dev eno1 alias "hit" ~]# ip link show eno1 2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT qlen 1000 link/ether 00:22:19:1e:a2:5b brd ff:ff:ff:ff:ff:ff alias hit ~]# ip link delete dev eno1 alias "hit" RTNETLINK answers: Operation not supported Thoughts? It's mildly annoying at most. -- ---~~.~~--- Mike // SilverTip257 //

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librhythmbox-itms-detection-plugin.so
by Alice Wonder 08 Nov '15

08 Nov '15

I'm looking at ways to potentially reduce tracking via browser fingerprints. https://panopticlick.eff.org/ When I go to that url in CentOS FireFox - my browser is very distinct. For me I believe this is largely caused by gstreamer. I run a modern gstreamer, not the CentOS packages gstreamer. My modern gstreamer also includes a lot of the patent-encumbered codecs, and on that eff project page, I can see them being reported by the GStreamer plugin as supported, making my firefox very unique and subject to tracking via browser fingerprint. I'm not sure there is anything I can do about that, other than going back to stock gstreamer which I can't do because I need gstreamer support for some codecs not supported by stock CentOS gstreamer. I think for anything that is a plugin, I think the browser should ask the user. That would make browser fingerprinting more difficult. One of the plugins though that is detected is from rhythmbox. I didn't even know there was a rhytmbox plugin for firefox. /usr/lib64/mozilla/plugins/librhythmbox-itms-detection-plugin.so It is part of the core rhythmbox package. I certainly have no need for it, and I doubt very many people do. It seems to me that maybe that plugin should be part of a sub-package to rhythmbox rather than rhythmbox itself, strictly from a security perspective so that if there is an exploitable bug in it, it will only be a vector for those who actually want that plugin. Does anyone actually use that plugin for anything? Maybe it should just be removed from the Fedora / RHEL / CentOS world.

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safest way to grow a LV under VMware ESXi5.5
by Boris Epstein 08 Nov '15

08 Nov '15

Hello all, In your view, what is the most reliable and safe way to increase an LV housing the root filesystem of a Centos 6 VM. I am thinking either growing the virtual HD virtual device, or creating a new device and adding it as a PV to the VM, or perhaps migrating the whole FS to a new virtual disk. Any input on how best to proceed would be appreciated. Cheers, Boris.

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NetworkManager and network service
by Sergio Belkin 06 Nov '15

06 Nov '15

Hi, folks, I 've created interfaces files with the NM_CONTROLLED=no statement and I've found that even after restarting network services changes are not commited. Only it worked after running ```` nmcli connection reload ```` restart of the network service worked. I wonder if it's either a feature or a bug... Could you help me? Thanks in advance! -- -- Sergio Belkin LPIC-2 Certified - http://www.lpi.org

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c++ Development question
by Leandro 06 Nov '15

06 Nov '15

Hello Centos user. Im learning about c/c++ , so far every thing works great. The problem begins when I try to install a new library or a third party api. For example now I need to install the jsoncpp implementation in my centos box but I have no idea how to do it. I realized that my knolowge about those things is very poor. I would like to ask you for some documentation about libraries directories layout regarding c/c++ programing. Im not interested in the languaje it self but how to prepare my server to succesfully compile c/c++ programas. I hope someone can help my on this. Regards, Leo.

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Re: [CentOS] getting a CentOS6 VM on VMware ESXi platform to recognize a new disk device
by m.roth＠5-cent.us 06 Nov '15

06 Nov '15

Boris Epstein wrote: > Hello Julius, > > Thanks - but it doesn't seem to work. > > I installed sg3_utils and ran > #scsi-rescan > > but that seemed to have done nothing for some reason. > My turn for a dumb question: from not paying a lot of attention to this thread, the answer isn't clear to me: has the *host* recognized the disk? If not, the guest's not going to see it. mark

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Centos 7, ATI card, 30" monitor
by m.roth＠5-cent.us 06 Nov '15

06 Nov '15

Well, I got my user back to being able to use his system, but I've still got one issue: it's running on the VESA driver - there is *no* Catalyst build for this monitor, for CentOS 7. From a lot of googling, nothing's been done since the summer of '14 (lspci reports it as a FirePro V3900). Any thoughts, or pointers, as to if/how I can get X - he's running KDE - to see the full width of the monitor, not just about 4" less, or is that not possible with the VESA driver? mark

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CentOS-announce Digest, Vol 129, Issue 3
by centos-announce-request＠centos.org 06 Nov '15

06 Nov '15

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit https://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-2015:1988 CentOS 7 screen FASTTRACK BugFix Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Thu, 5 Nov 2015 14:01:16 +0000 From: Johnny Hughes <johnny(a)centos.org> To: centos-announce(a)centos.org Subject: [CentOS-announce] CEBA-2015:1988 CentOS 7 screen FASTTRACK BugFix Update Message-ID: <20151105140116.GA854(a)n04.lon1.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2015:1988 Upstream details at : https://rhn.redhat.com/errata/RHBA-2015-1988.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) x86_64: 92057de1fcc98976f307be19cf298640a1fb6975d526ea947d42d2cef3100f22 screen-4.1.0-0.22.20120314git3c2946.el7.x86_64.rpm Source: de2b9e8d133cd88512293cbf63962f44797d8d8433766edcb3945758c133ed6f screen-4.1.0-0.22.20120314git3c2946.el7.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net Twitter: @JohnnyCentOS ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org https://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 129, Issue 3 ***********************************************

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synthesizing yum transactions
by Brian Reichert 05 Nov '15

05 Nov '15

Ok, I'm trying way too hard to shovel myself out of a hole. We have a bunch of remote CentOS 6 servers, that were configured with kickstart. They've subsequently had additional RPMs installed/updated via the 'rpm' utility. We have reason to occasionally rewind the state of the server back to it's original set of RPMs. Of late, we've found that 'yum' handles this scenario quite nicely, IFF (if and only if) that all RPM changes were handled via the 'yum' utility itself, such that yum can manage a list of transactions. In this case 'yum history rollback 1' does exactly what we need. My problem is that we did not exclusively use 'yum' to do this work, and even though there are newer RPMs in place, yum only knows about transaction ID 1, from the initial kickstart installation. Hence, it thinks there's nothing to rollback from. So, given the knowledge of what RPMs are currently installed, is there a way to invent a new transaction incorporating them, without reinstalling the RPMs in question? I feel I've come close, with this methodology, basically coercing yum to rebuild a database in a private directory: # installroot for yum workdir=/home/yum-hack rm -rf ${workdir} mkdir -p ${workdir} cd ${workdir} # list of newer RPMs (after transaction ID 1) new=new_rpms # dup repos and rpm/yum databases for tree in /var/lib/rpm/ /var/cache/yum/ /var/lib/yum/ /etc/yum.repos.d/; do echo ${tree} mkdir -p ./${tree} cp -pr ${tree}/* ./${tree} done cat new_rpm | xargs /usr/bin/yum -y --nogpgcheck --installroot=${workdir} \ --setopt=tsflags=noscripts reinstall On the surface, this seems to work, in that I now can see a transaction list: yum --installroot=/home/yum-hack history list all But, any effort to rollback to tid 1 yields: Transaction history is incomplete, before 5. You can use 'history rollback force', to try anyway. Error: Failed history rollback, incomplete So, I've clearly tricked myself. Does anyone have any suggestions about how I _should_ retroactively invent an additional yum transaction? This there some state I failed to introduce into the the above private directory? I've only begun to dive into the yum source to try to track down what triggers this error, but if anyone has some immediate knowledge, or suggestion for a better forum where I can ask this question? Some details of my environment, if that's helpful: [root@172-20-245-145 ~]# cat /etc/redhat-release CentOS release 6.5 (Final) [root@172-20-245-145 ~]# rpm -q yum rpm yum-3.2.29-69.el6.centos.noarch rpm-4.8.0-37.el6.x86_64 Thanks for any advice... -- Brian Reichert <reichert(a)numachi.com> BSD admin/developer at large

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CentOS 7, new video card in server
by m.roth＠5-cent.us 05 Nov '15

05 Nov '15

Hi, folks, I've got a new Dell R730 server. My users have two Tesla K-80's in it. Then, they wanted to add video, for complicated reasons. Anyway, there's the onboard VGA; I just put in a Quadro K600 (they require DP, and this card offers that). Plug in a VGA monirot (the card even comes with two adaptors, one from large DP to DVI-D, and one DVI-D to VGA. (And according to the quick start guide, there's no additional power cable.) Boot the system, and no video on from the card. In the BIOS, the only thing I see that appears to relate is enable/disable onboard video. I'm looking at that as a last option, since I have no idea how I'd *undo* it, if I then have zero video.... Dell, of course, doesn't support ordinary video cards in a server.... So, anyone have clues, or pointers, to getting video coming out of the new card? Now, I have no issues with putting the proprietary NVidia driver on, but I'm trying to figure out if I'm missing something. Note that, as a server, of course, it is coming up in runlevel 3. mark

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