Discuss May 2016

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155 participants
149 discussions

Re: [CentOS] [SOLVED] Kernel panic on 6.8 release with kernel-2.6.32-642.el6.x86_64
by Sorin Srbu 27 May '16

27 May '16

> -----Original Message----- > From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On > Behalf Of Sorin Srbu > Sent: den 27 maj 2016 07:43 > To: CentOS mailing list <centos(a)centos.org> > Subject: Re: [CentOS] Kernel panic on 6.8 release with kernel-2.6.32- > 642.el6.x86_64 > > > > Uninstalled NFS, as it wasn't needed anyway. > > > > > > Still got the panic. > > > > Seriously, what panic? > > The one I posted a screen dump of earlier. Did some more digging this morning. All physical machines are quite okay with the 6.8 upgrade. All virtual machines running on Hyper-V get a kernel panic - if the linux integration services (lis) are installed on the guest. Uninstalling lis, then applying the kernel-2.6.32-642.el6.x86_64 and rebooting works just fine. No kernel panics. Supposedly (according to some forum posts I read) the lis shouldn't care what kernel is actually running, as long as it is compiled with a kernel that is installed and available on the system, in this case the last previous before the 6.8-upgrade. In any case, problem solved for now. Thanks for all the feedback! Marking thread as solved. -- //Sorin

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Recommendations for Infiniband with CentOS 6.7
by Pat Haley 26 May '16

26 May '16

Hi All, We looking for suggestions on dealing with mellanox drivers in CentOS 6.7 We tried installing mellanox drivers (MLNX_OFED_LINUX-3.2-2.0.0.0-rhel6.7-x86_64) on a Quanta Cirrascale server running Centos 6.7 - 2.6.32-573.22.1.el6.x86_64. When we rebooted the machine after installing the drivers, it went into a kernel panic for every installed kernel except for Centos 6.7 2.6.32-573.22.1.el6.x86_64.debug. After we uninstalled the drivers, the machine failed to boot for any installed kernel. Any suggestions on how to proceed would be greatly appreciated. Thanks -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Pat Haley Email: phaley(a)mit.edu Center for Ocean Engineering Phone: (617) 253-6824 Dept. of Mechanical Engineering Fax: (617) 253-8125 MIT, Room 5-213 http://web.mit.edu/phaley/www/ 77 Massachusetts Avenue Cambridge, MA 02139-4301

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centos7 tmpfiles.d deleted outdate files
by Qiang Chen 26 May '16

26 May '16

Hi all, I use centos7 and don't want to use tmpwatch as well as crond. I have a question to use `systemd-tmpfiles-clean.service` with my custom configured file in `tmpfiles.d` to delete outdated files periodically in some log dir. I have a `tmpfiles.d` configured file in `/etc/tmpfiles.d` named `my_log.conf` in following contents. ``` #Type Path Mode UID GID Age Arg r /chenqiang 0775 root root 10s r /chenqiang/test_10s r /chenqiang/test_20s ``` If I run `systemd-tmpfiles --remove` with above configure, all files and dir will be deleted if I set 'r' type for the files and dir. but, I want to only delete some outdated files in the dir. and I use `systemd-tmpfiles --clean` with following configure. ``` #Type Path Mode UID GID Age Arg d /chenqiang 0775 root root 10s f /chenqiang/test_10s 0660 root root 10s f /chenqiang/test_20s 0660 root root 20s ``` It can delete dir if the age > 10s, but can't delete the files in it. So, would some one help me if I want to delete the outdated files ? -- Best Regards, Chen, Qiang

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Re: [CentOS] dnf replacing yum?
by Timothy Murphy 26 May '16

26 May '16

Kenneth Porter wrote: > I saw mention of dnf in a blog article about installing a package on > CentOS. Further investigation revealed that Fedora is replacing yum with > dnf, apparently a new and better yum. But it wasn't clear if dnf was a For the normal user (like me) dnf is neither better nor worse than yum. In fact it is almost identical. In my view, the introduction of a new name was completely unnecessary and the cause of the only (small) complication with the changeover, eg should I look in /etc/yum.repos.d/ or /etc/dnf.repos.d/ ? Also, yum had associations which it was sad to lose. -- Timothy Murphy gayleard /at/ eircom.net School of Mathematics, Trinity College, Dublin

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CentOS-announce Digest, Vol 135, Issue 10
by centos-announce-request＠centos.org 26 May '16

26 May '16

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. Release for CentOS Linux 6.8 i386 and x86_64 (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Wed, 25 May 2016 11:04:19 -0500 From: Johnny Hughes <johnny(a)centos.org> To: CentOS-Announce <centos-announce(a)centos.org> Subject: [CentOS-announce] Release for CentOS Linux 6.8 i386 and x86_64 Message-ID: <5745CD03.20409(a)centos.org> Content-Type: text/plain; charset="utf-8" We are pleased to announce the immediate availability of CentOS Linux 6.8 and install media for i386 and x86_64 Architectures. Release Notes for 6.8 are available at: http://wiki.centos.org/Manuals/ReleaseNotes/CentOS6.8 We recommend everyone review these release notes. CentOS Linux 6.8 is derived from source code released by Red Hat, Inc. for Red Hat Enterprise Linux 6.8. All upstream variants have been placed into one combined repository to make it easier for end users. Workstation, server, and minimal installs can all be done from our combined repository. All of our testing is only done against this combined distribution. There are many fundamental changes in this release, compared with the past CentOS Linux 6 releases, and we highly recommend everyone study the upstream Release Notes as well as the upstream Technical Notes about the changes and how they might impact your installation. (See the 'Further Reading' section if the CentOS release notes link above). All updates since the upstream 6.8 release are also on the CentOS mirrors as zero day updates. When installing CentOS-6.8 (or any other version) from any of our media, you should always run 'yum update' after the install to apply these. Users consuming our centos-cr repositories will already be running all the packages that make up CentOS-6.8, and all updates released since. They will notice only the centos-release and anaconda updates today when moving to CentOS Linux 6.8. For more information on the CR repository for future updates, see this link: http://wiki.centos.org/AdditionalResources/Repositories/CR Release Announcements for all updated packages are available here: http://bit.ly/1WOy3dB +++++++++++++++++++++++ Upgrading From Prior Major CentOS Versions: We recommend everyone perform a fresh reinstall rather than attempt an inplace upgrade from other major CentOS versions (CentOS-2.1, CentOS-3.x, CentOS-4.x, CentOS-5.x). +++++++++++++++++++++++ Upgrading from CentOS-6.0 / 6.1 / 6.2 / 6.3 / 6.4 / 6.5 / 6.6 or 6.7 CentOS Linux is designed to automatically upgrade between releases within a major version (in this case, CentOS-6). Unless you have edited your yum default configuration, a 'yum update' should move your machines seamlessly from any previous CentOS Linux 6.x release to 6.8. We also test this in our QA cycles and have noticed no problems, any issues would be mentioned in the Release Notes. +++++++++++++++++++++++ Downloading CentOS Linux 6.8 for new installs: When possible, consider using torrents to obtain our ISOs. Usually it is also the fastest means to download the distro. The install media is split into various formats. We have made efforts to ensure that most install types and roles can be done from DVD-1 itself, and the minimal install ISO is only tested to deliver a minimal install set, when used as an ISO format ( either on cd or usb ). While other forms of installs ( eg. pxe delivered ) might work from the minimal ISO, they are neither tested not supported. The only format where we support the entire set of install options and delivery mechanisms is via the complete CentOS Linux 6.8 tree, wihch can also be created by consolidating all content from DVD1 and DVD2. We no longer produce CD size images for the entire CentOS Linux 6 distribution, however the minimal install and netinstall iso images are small enough to fit on all CD grade media. Torrent files for the DVD's are available at : http://mirror.centos.org/centos/6.8/isos/i386/CentOS-6.8-i386-bin-DVD1to2.t… http://mirror.centos.org/centos/6.8/isos/x86_64/CentOS-6.8-x86_64-bin-DVD1t… You can also use a mirror close to you to get any of our ISOs: http://mirror.centos.org/centos/6.8/isos/ If you need to update a local mirror, you can choose from our mirror network http://www.centos.org/download/mirrors/ Most mirrors will allow downloads over http, ftp and rsync. Note: The x86_64 ISOs (minimal, netinstall, DVD1) should install on UEFI machines. Secure Boot must be disabled to install CentOS 6. The Live ISOs and i386 ISOs will not boot with UEFI. +++++++++++++++++++++++ sha256sum for the CentOS-6.8 ISOS: i386: 720d185fdf063383a4471657076b72fc162d3c3c3bca2e5e5ae13a25b3046519 CentOS-6.8-i386-bin-DVD1.iso 0c1a498a469214f276b4390a9ac2111fe8eb89084f7921d2eced659ada09e1a9 CentOS-6.8-i386-bin-DVD2.iso 7df6c27c0cd1186845bee4e786d43dbd3ae429258098283f9dbc2b2d20ed6a89 CentOS-6.8-i386-LiveCD.iso 7e2ace104901921ac919a390be827251727dfd04437fbd4e4d3024b6d70d8718 CentOS-6.8-i386-LiveDVD.iso f4cf0614cc2ac451ffec5bd349ee74a1b31fd394e58561a07c38a21be5a4bdeb CentOS-6.8-i386-minimal.iso 1668434d76e14a45a189b7810582e7e6ded686854f75b7f8ba053830a5706e57 CentOS-6.8-i386-netinstall.iso x86_64: dda55622614a8b43b448a72f87d6cb7f79de1eff49ee8c5881a7d9db28d4e35 CentOS-6.8-x86_64-bin-DVD1.iso 0aba869427b4ce04e100d72744daf7fea1f7be2e4be56b658095bd9e99e04e6d CentOS-6.8-x86_64-bin-DVD2.iso efa82d673206cb6af377b1f929a510cc2b1ce95cdb436210121ec271e056c920 CentOS-6.8-x86_64-LiveCD.iso 52a9c8c1d250de39976dda9412293473b8349efefb31b66fecdee0fdf93866d9 CentOS-6.8-x86_64-LiveDVD.iso ec49c297d484b9da0787e5944edc38f7c70f21c0f6a60178d8e9a8926d1949f4 CentOS-6.8-x86_64-minimal.iso 56d9cc5757ed1443af7b321967622a108978328f72e58050d31bcf1998dfd162 CentOS-6.8-x86_64-netinstall.iso +++++++++++++++++++++++ Cloud Images: Images for various on-premise and off-premise Cloud environments are currently under development for CentOS Linux 6.8 and will be released in the coming days. Everyone looking to join and help with the CentOS Cloud efforts is encouraged to join the CentOS-devel list where such issues are discussed ( http://lists.centos.org/mailman/listinfo/centos-devel ). +++++++++++++++++++++++ Getting Help: The best place to start when looking for help with CentOS is at the wiki ( http://wiki.centos.org/GettingHelp ) which lists various options and communities who might be able to help. If you think there is a bug in the system, do report it at http://bugs.centos.org/ - but keep in mind that the bugs system is *not* a support mechanism. If you need supported software with Support Level Agreements, people to call and response times then we recommend Red Hat Enterprise Linux. If you have questions you would like to field at us in real time, come join the office hours on Wed or Thu of every week. You can find details on these at http://wiki.centos.org/OfficeHours +++++++++++++++++++++++ Meet-ups and Events: If you would like to get involved in helping organize, run, present or sponsor a CentOS Dojo or even just want more details then join the CentOS Promo list: http://lists.centos.org/mailman/listinfo/centos-promo and drop an email introducing yourself. We are very keen to find help to run events around the world, and also to find people who can represent CentOS at various community events around the world. +++++++++++++++++++++++ Contributing and joining the project: We are always looking for people to join and help with various things in the project. If you are keen to help out a good place to start is the wiki page at http://wiki.centos.org/Contribute . If you have questions or a specific area you would like to contribute towards that is not covered on that page, feel free to drop in on #centos-devel at irc.freenode.net for a chat or email the centos-devel list (http://lists.centos.org) +++++++++++++++++++++++ Thanks to everyone who contributed towards making CentOS Linux 6.8, especially the effort put in, as always, by the QA (http://wiki.centos.org/QaGroup) and Build teams. A special shout out to all the donors who have contributed hardware, network connectivity, hosting and resources over the years. The CentOS project now has a fairly well setup resource pool, solely thanks to the donors. Enjoy! -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net Twitter: @JohnnyCentOS

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centos7 tmpfiles.d deleted outdate files
by Qiang Chen 26 May '16

26 May '16

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Re: [CentOS] Question on 7.2 and weird characters [solved]
by Jerry Geis 26 May '16

26 May '16

On Mon, May 23, 2016 at 3:09 PM, Jerry Geis <geisj(a)pagestation.com> wrote: > When I run this command: > rm /tmp/jerry.txt > rm: remove regular file â/tmp/jerry.txtâ? > > I get the a with the carrot on top... > > How do I get back to the normal characters ? > > echo $TERM > linux > > Thanks, > > Jerry > thanks for the pointers... It was in fact the putty settings. Under Translation I needed to select UTF-8. All is good. Thanks again. Jerry

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dnf replacing yum?
by Kenneth Porter 25 May '16

25 May '16

I saw mention of dnf in a blog article about installing a package on CentOS. Further investigation revealed that Fedora is replacing yum with dnf, apparently a new and better yum. But it wasn't clear if dnf was a drop-in replacement or if some migration setup was required. Is it supposed to work with CentOS or do we ignore it until some future release? <https://www.linux.com/learn/what-you-need-know-about-fedoras-switch-yum-dnf> I installed dnf with yum and tried installing another package with it and it complains: [root@orifice ~]# dnf install certbot Failed to open: /var/cache/dnf/x86_64/7/x86_64/7/epel/repodata/b3221500eaedf45b7ec0737a410cde7e3f09b49070c729449938b961ccbdf397-updateinfo.xml.bz2. I don't install new packages often, but it does sound like dnf's new dep solver is a Good Thing when that's needed.

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CentOS 7 + GUI as KVM guest: fix screen resolution
by Nicolas Kovacs 25 May '16

25 May '16

Hi, I'd like to run CentOS 7 in a KVM guest (host is my Slackware64 14.1 workstation). The main purpose of this installation will be to build custom RPM packages. I've made a few tests, and everything works more or less as expected. I'd like to resolve a small problem that's nagging me though. When I install a GUI, I usually start by installing a minimal system, then I add some command-line tools, then the X Window System, then I add a lightweight window manager like WindowMaker to configure X, and then only I install GNOME, the base desktop and only the applications I need. So far this works quite well. I just made a first installation of CentOS + X11 + WindowMaker in a KVM guest, and I have some small resolution problems. I have a twin-monitor setup, with the left 19" monitor displaying the host system, and the right 19" monitor the guest system. The "ideal" resolution for this type of monitor is 1280x1024. Now when I start WindowMaker in the guest system, I get a weird resolution, something like 1024x600: looks like 1024x768, only it gets squashed down to what looks like 16/9. The top and bottom borders of the screen are black, a bit like a cinemascope movie. Now I tried to make a second "vanilla" installation of CentOS in another KVM guest. This time I installed the default GNOME GUI. After the initial reboot, GDM has the same weird resolution (1024x600 I guess), and GNOME starts up with this same resolution also. BUT: I can go to the Monitor Settings, and define 1280x1024 as resolution, and this works perfectly. Unfortunately this solution only seems to work on a per-user basis, and only in GNOME. So here's my question: - How did GNOME do that (redefine my monitor resolution on the fly)? - Is there a way to achieve this new resolution system-wide, and also for WindowMaker? I tried to fiddle a bit with xorg.conf (X -configure, copy it over, edit it), but to no avail. Cheers, Niki -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Web : http://www.microlinux.fr Mail : info(a)microlinux.fr Tél. : 04 66 63 10 32

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CentOS 7, container question
by m.roth＠5-cent.us 25 May '16

25 May '16

Hi, folks, We would like to run a container on a server, the reason being the COST of a Sybase license (it's by core), and what we can afford is a 4-core license. Now, the server's a nice Dell w/ 32 cores, so, ideally, what we want to do is set up containers, then, in one container, *only* have it see 4 cores, while the rest of the server, including (possibly) other containers, can see the other 28. The first try seems to have disabled *all* the cores other than those four. Is it possible to do what we want, and if so, some pointers would be most appreciated. mark

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Discuss May 2016