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34758 discussions

Proper setup for major package removals?
by waltdnes＠waltdnes.org 11 Oct '16

11 Oct '16

I've installed CentOS in a QEMU VM for some gcc-compiling work. I've used Gentoo for years, but am a newbie at CentOS. During install, I selected "development" options, which pulled in more than I really need. I don't want or need a heavy desktop environment chewing up part of the 4 gigs allocated to the VM, but I will occasionally need a GUI. What I'd like to do is remove GDM, Gnome DE, Java, Ruby, and a bunch of other stuff. Then install ICEWM. I want to remove GDM, but keep X, so that the machine comes up at the text command line. If/when I need a GUI, I'll type "startx", after setting up ~/.xinitrc. So far, I've made one change to yum.conf, by adding remove_leaf_only=1 I think that my next 2 steps should be to execute... init 3 yum groupremove gnome-desktop Then what? "yum search icewm" does not find anything, and I may still have GDM trying to log me in to a non-existant GNOME. What do I do next? By the way, at startup, I notice a message quickly flash by like... "intel_rapl: no valid rapl domains". What's it about? -- Walter Dnes <waltdnes(a)waltdnes.org>

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mcrypt on PHP 5.4 and 5.5
by H 10 Oct '16

10 Oct '16

I have Centos 6.8 running on a VPS and upgraded PHP from 5.3 to 5.4 using scl. Unfortunately it seems mcrypt is not available, neither for 5.4 nor for 5.5. What have other users done about that? Unfortunately I have an application that requires mcrypt.

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upgrade reference docs
by Chuck Campbell 10 Oct '16

10 Oct '16

Is there a Centos 6.x to Centos 7.x guide somewhere? What has changed, that I need to learn about as an admin, before I jump in and flounder? thanks, -chuck -- ACCEL Services, Inc.| Specialists in Gravity, Magnetics | (713)993-0671 ph. | and Integrated Interpretation | (713)993-0608 fax 448 W. 19th St. #325| Since 1992 | (713)306-5794 cell Houston, TX, 77008 | Chuck Campbell | campbell(a)accelinc.com | President & Senior Geoscientist | "Integration means more than having all the maps at the same scale!"

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dictionary on centos
by Valeri Galtsev 10 Oct '16

10 Oct '16

Dear All, Could someone recommend open source dictionary one can install on CentOS 7? I have a user who needs Chinese-English dictionary. He downloaded it from some website in China. My problem is: I neither speak nor read Chinese (were it English, Russian or German I would be OK), so I can not read the License agreement, and I can not audit this software (or evaluate somehow else its sanity). But installing open source Chinese-English dictionary would solve these my problems (if my user accepts the replacement). Thanks a lot for your advises! Valeri ++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++

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External monitor support changes.
by Lamar Owen 10 Oct '16

10 Oct '16

I've been working on this issue for quite a while. Back in January of 2015 I posted about how well external monitors worked with the out-of-the-box CentOS 7 ATI radeon drivers and my Dell M6500 with an ATI FirePro M7820. At the time the support was seamless and 'Just Worked' without any issue. A few months later, some update came down the pipe and this broke completely, with the same projector that had been working fine for a while. It just simply quit working. The docked double monitors still worked fine, and it wasn't a critical issue for me, so I kept trying it occasionally to see if it would start working again, but it never did. So last week I upgraded laptops to a Dell Precision M6700 with an nVidia card, upon which I immediately installed the ELrepo drivers. The docked dual monitors worked fine (used in a triple monitor setup, just like the ATI card in the M6500). So I decided I would try the HDMI port. Well, it did exactly the same thing the M6500 with the ATI card did. The symptom is that the laptop screen will blank, then come back for a bit, then blank for a few seconds then come back; lather, rinse, repeat. The Xorg log shows this: +++++++++++++++++++++++++ [ 239.338] (**) NVIDIA(0): Using HorizSync/VertRefresh ranges from the EDID for display [ 239.338] (**) NVIDIA(0): device DELL 7700 (DFP-1) (Using EDID frequencies has been [ 239.338] (**) NVIDIA(0): enabled on all display devices.) [ 239.344] (--) NVIDIA(GPU-0): DELL 7700 (DFP-1): connected [ 239.344] (--) NVIDIA(GPU-0): DELL 7700 (DFP-1): Internal TMDS [ 239.344] (--) NVIDIA(GPU-0): DELL 7700 (DFP-1): 165.0 MHz maximum pixel clock [ 239.344] (--) NVIDIA(GPU-0): [ 239.459] (II) NVIDIA(0): Setting mode "DP-0: nvidia-auto-select @1920x1080 +1920+0 {ViewPortIn=1920x1080, ViewPortOut=1920x1080+0+0}" [ 240.048] (II) NVIDIA(0): Setting mode "LVDS-0: nvidia-auto-select @1920x1080 +0+0 {ViewPortIn=1920x1080, ViewPortOut=1920x1080+0+0}, DP-0: nvidia-auto-select @1920x1080 +1920+0 {ViewPortIn=1920x1080, ViewPortOut=1920x1080+0+0}" [ 240.542] (--) NVIDIA(GPU-0): CRT-0: disconnected [ 240.542] (--) NVIDIA(GPU-0): CRT-0: 400.0 MHz maximum pixel clock [ 240.542] (--) NVIDIA(GPU-0): [ 240.542] (--) NVIDIA(GPU-0): CMN (DFP-0): connected [ 240.542] (--) NVIDIA(GPU-0): CMN (DFP-0): Internal LVDS [ 240.542] (--) NVIDIA(GPU-0): CMN (DFP-0): 330.0 MHz maximum pixel clock [ 240.542] (--) NVIDIA(GPU-0): [ 240.566] (--) NVIDIA(GPU-0): DELL 7700 (DFP-1): connected [ 240.566] (--) NVIDIA(GPU-0): DELL 7700 (DFP-1): Internal TMDS [ 240.566] (--) NVIDIA(GPU-0): DELL 7700 (DFP-1): 165.0 MHz maximum pixel clock +++++++++++++++++++++++ The nVidia control panel shows the DELL 7700 coming up, then going away, then coming up, then going away. I hadn't tried the M6500 in a while with it, so I'm going to try it again and look at the Xorg log, but my recollection is that the symptoms and log were the same. There isn't any error condition reported in the Xorg log; it just doesn't ever display anything on the projector. While I realize that the nvidia drivers are ELrepo packages, the same symptoms happened with the M6500's ATI with the stock CentOS 7 ATI drivers; it worked beautifully one day, then some updates came, and it just quit working, using the same projector, cables, and receiver. I don't recall exactly where in the 7.x cycle this happened, unfortunately. I may give the original 7.0 a whirl then the original 7.1 a whirl, but I think it started with the 7.2 release. It could be the receiver in the middle, and I'll try a direct cable to the projector. But I tried that with the M6500 and it didn't change anything. But, again, the docked triple-head configuration works like a champ. I will perform more testing and update as I find things.

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Desktop for newbies
by david 10 Oct '16

10 Oct '16

Folks I'm about to set up a non-root user on a Centos=7 server that I control for a friend. It is in his home, so access is local. He's a refugee from the latest Windows 10 Upgrade. I'd like a suggestion as to which of the several possible graphical desktops to suggest to him and set up for him as his default. My aim is: - Allow him to try out Linux as an end-user - Let him start to feel comfortable with the desktop - Learn the new idioms for familiar programs and functions And later - Give him his own system with root privileges. Suggestions? David

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3rd and 4th keys keymapped in Keyboard Layout???
by ken 09 Oct '16

09 Oct '16

Looking at the Keyboard Layout in CentOS 7.2, there are a 3rd and 4th characters for many keys. E.g., for 'd' there are the division sign and the degree symbol. I've tried the obvious key combinations-- Alt-d, Alt-Shift-d, etc.-- but no luck. Is there some configuration change I need to make in Gnome...? or what do I need to do to access these 3rd and 4th key characters? tia

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Kerberized NFS client and slow user write performance
by Matt Garman 07 Oct '16

07 Oct '16

We seem to be increasingly hit by this bug: https://access.redhat.com/solutions/2040223 "On RHEL 6 NFS client usring kerberos (krb5), one user experiences slow write performance, another does not" You need a RH subscription to see that in its entirety. But the subject basically says it all: randomly, one or more users will be subjected to *terrible* NFS write performance that persists until reboot. There is a root cause shown, but that is cryptic to non-kernel devs; it doesn't explain from a user perspective what triggers this state. (That's why it appears to be random to me.) There is no solution or workaround given. This appears to be on a per-user + per-server basis, so a crude workaround is to migrate the user to a different server. And we do regular reboots, which somewhat hides the problem. My question to the list: has anyone else dealt with this? The link says "Solution in Progress", but that was last updated nearly a year ago. We don't have any support contracts with upstream, just the website access subscription, so I doubt RH will offer any help. Appreciate any suggestions! Thanks, Matt

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CentOS-announce Digest, Vol 140, Issue 4
by centos-announce-request＠centos.org 07 Oct '16

07 Oct '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. [Infra] - CentOS Bug tracker migration / maintenance window (Fabian Arrotin) ---------------------------------------------------------------------- Message: 1 Date: Fri, 7 Oct 2016 08:03:37 +0200 From: Fabian Arrotin <arrfab(a)centos.org> To: "The CentOS developers mailing list." <centos-devel(a)centos.org>, centos-announce(a)centos.org Subject: [CentOS-announce] [Infra] - CentOS Bug tracker migration / maintenance window Message-ID: <d9892bbc-f65b-ca04-a824-154c1e2b2a07(a)centos.org> Content-Type: text/plain; charset="utf-8" We have to upgrade our current MantisBT instance for the CentOS bug tracker service (aka https://bugs.centos.org) Migration is scheduled for """"Friday october 7th, 12:15 pm UTC time"""". You can convert to local time with $(date -d '2016-10-7 12:15 UTC'') The expected "downtime" is estimated to ~15 minutes , time needed to update MantisBT code, run the mysql schema update, and then put the node back in production mode. Thanks for your comprehending and patience. on behalf of the Infra team, -- Fabian Arrotin The CentOS Project | http://www.centos.org gpg key: 56BEC54E | twitter: @arrfab

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porting spec files
by Alice Wonder 07 Oct '16

07 Oct '16

An rpm intended for a bleeding edge Fedora builds perfectly for me when I comment two macros apparently not in CentOS 7 - %transfiletriggerin and %transfiletriggerun Looks like they operate similar to %post and %postun but are different. Is a simple way to do what they do in CentOS 7 or do I have to change the packaging logic to build in CentOS 7 and have things work properly? -- -=- Sent my from my laptop, may not be able to respond timely

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