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Unable to install extras "centos-release-scl" "epel-release"
by waltdnes＠waltdnes.org 12 Oct '16

12 Oct '16

I have CentOS7 32-bit x86 AltArch in a VM. Following advice I found on Google, I tried stuff like "sudo yum install centos-release-scl" and "sudo yum install epel-release". They came back with... No package centos-release-scl available. No package epel-release available. What am I missing? -- Walter Dnes <waltdnes(a)waltdnes.org>

3 3

Virtualbox image
by Jerry Geis 11 Oct '16

11 Oct '16

How do you make a Virtualbox image of C7 so that when you EXPORT that image and someone imports it that the values in /etc/fstab will be OK. Example: UUID=13813d49-15b7-48ed-ab0d-da52aa3a9078 / xfs defaults 0 0 UUID=7f25297f-170c-4aee-ad4f-7ccc5867ed25 /home xfs defaults 0 0 /dev/mapper/centos-swap swap swap defaults 0 0 Then the exported, imported image boots its still referencing the first UUID there and it cannot find it so it does not boot. How can I change this so my image runs, and then when I export it and someone imports it that their image runs. ??? Thanks, Jerry

2 1

Hint for nslookup wanted ...
by Walter H. 11 Oct '16

11 Oct '16

Hello, has anybody a hint for me, how I can use nslookup to get either IPv6 AAAA only or both A and AAAA entries when doing this: e.g. # nslookup www.example.com Thanks, Walter

5 7

CentOS ISO contents
by Harry Mallon 11 Oct '16

11 Oct '16

On the download page https://wiki.centos.org/Download it lists: DVD, Minimal, Everything, LiveGNOME, LiveKDE. Where can I find the lists of packages contained in each one without downloading and extracting them? Is there a repo with the scripts that make them maybe? Harry Harry Mallon CODEX | Software Engineer 60 Poland Street | London | England | W1F 7NT E harry(a)codexdigital.com<mailto:harry@codexdigital.com> | T +44 203 7000 989<callto:+44%20203%207000%20989> Website<www.codexdigital.com> | Facebook<https://www.facebook.com/codexdigital> | Twitter<http://twitter.com/codexdigital> [http://www.codexdigital.com/?action=asset&id=E55D8A6F-AF62-4978-8FF1-435A85…]<http://www.codexdigital.com>

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Re: [CentOS] Reverting to nouveau
by geo.inbox.ignored 11 Oct '16

11 Oct '16

On 10/07/2016 02:03 PM, Patrick O'Callaghan wrote: > On Fri, 2016-10-07 at 11:38 -0500, geo.inbox.ignored wrote: >> as for nvidia site, check to see if you can find a more proper driver at; >> >> http://www.nvidia.com/download/index.aspx > > That's where the drivers come from, via RPMfusion. > >> as for 'on all the time', i agree about your saving power. >> >> *but*, give consideration to fact that powering a system up and down >> can be more costly due to 'electronic' wear and tear on system. > > I tend to agree in fact. I never used to turn my computers off, then I > worked out how much power they consume and how much it costs. I've > noticed a difference in my bill since I started doing this. > ==> well yes. of course there will be power consumption from mains. my view is there is less electronic wear and tear when powered up 24/7 and due to inrush power surge on power up, less chance of some component going bad. years back when i did computer systems work, i had a couple client calls for a system not powering up at start of morning hours. i used light bulb example to explain why and that they would naturally see an increase in utilities bill. both started leaving systems up. have a friend who's system lost power supply on power up, and again, after explaining about light bulb, he leaves system powered up and because he is using centos and kde, he uses 'suspend to ram' when not using and 'suspend to disk' when away for several days. it is all owners choice. ps. excuse delay in reply. problems with thunderbird had me unable to run email. -- peace out. CentOS GNU/Linux 6.8 tc,hago. g . =+= Tired of having your microsoft os hacked? Change to Linux os, used by microsoft hackers. =+= in a world with out fences, who needs gates. =+=

1 1

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>

2 1

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.

2 1

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!"

4 4

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 ++++++++++++++++++++++++++++++++++++++++

1 0

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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