Discuss October 2015

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140 participants
113 discussions

selinux commands fail on low memory box
by Tim Dunphy 15 Oct '15

15 Oct '15

Hey all, I have 3 web servers hosted at Digital Ocean that all have the same amount of memory at 512MB. They're all running CentOS 7. They are low powered apache servers and don't really need more than that. All they're doing is serving the web, no database on those hosts at all. On the first two hosts I seem to have no trouble running SELinux related commands. It's only on the 3rd web server where I seem to have any trouble at all running the SELinux commands I want to keep the box secure. On box #3 all SElinux commands end up the same way. For example: [root@ops3:~] #semodule -i newrelic.pp Killed And that happened when I had about 280MB free: [root@ops3:~] #free -m total used free shared buff/cache available Mem: 490 96 286 28 107 285 Swap: 0 0 0 Typically what I'll do is stop all the main services on this machine to free up some memory to run the command I want. But to no avail! The commands die with the same errors every time. Whereas on the other two hosts I can run the same commands with only as little as 30 or 40MB free! So would this be some inherent flaw with this box? That the only way to get around it is to scrap it and build a replacement? Not that hard to do. But before I took that measure I was wondering if there was any hocus-pocus I could try that I might not be aware of that could alleviate this scenario. Thanks, Tim -- GPG me!! gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B

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copying to a local mirror / repository
by Richer, Mark (CIV) 15 Oct '15

15 Oct '15

I am using CentOS on a private network which can’t access the Internet so I want to create a local repository of packages on one or more DVDs, and get it installed on the private network. Someone had done this for CentOS 7, but not for CentOS 6. I have a VM running 6 so I am trying to create it for the previous major version. I thought there would be some obvious instructions on the preferred/recommended method for doing this, but I have failed to find them. Can anyone respond with any useful links on how best to do this or provide the recommended set of steps. I have seen various postings on this topic, but not anything official from the CentOS community. thanks much, Mark MARK H RICHER, MS CS Faculty Research Associate Computer Science Department Naval Postgraduate School - National Capital Region (NCR) 703-275-8533 (o) 571.303.9498 (m) mhricher(a)nps.edu<mailto:mhricher@nps.edu>

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abrt-auto-reporting
by Günther J. Niederwimmer 15 Oct '15

15 Oct '15

Hello, centos 7(1) I have a question about abrt-auto-reporting? should this work normal ? I have on my System Problems to report the Errors. Thanks for a answer, -- mit freundlichen Grüssen / best regards, Günther J. Niederwimmer

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CentOS 6 + Updates (HVM) AMI Breaks on attached instance storage
by Robert Bush 14 Oct '15

14 Oct '15

Where do i file a bug report for a centOS 6 ami on aws? Thanks, Robert

1 0

tcp wrappers Question..
by Jason Welsh 14 Oct '15

14 Oct '15

hey folks, I keep seeing this on the internet "The user name lookup feature of TCP Wrappers uses identd to identify the username of the remote host. By default, this feature is disabled, as identd may appear hung when there are a large number of TCP connections." but I cant seem to find out how/where to enable said feature. Jason

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redistribution of isolinux binaries
by Brian Reichert 14 Oct '15

14 Oct '15

I've been making my own custom RHEL / CentOS boot CDs for years, and all of the instructions for such work call out to take a distro's CD, and copy key files from it. Among those files are those that I think are associated with the the SYSLINUX/ISOLINUX project; e.g.: http://mirror.centos.org/centos/6/os/x86_64/images/ http://mirror.centos.org/centos/6/os/x86_64/isolinux/ Two questions: - As the SYSLINUX project is GPLed, to hand out binaries implies the sources are available somewhere, but I can't find an official point of reference on where the corresponding sources are. - Further, near as I can tell, the SYSLINUX project makes no reference to Kickstart, but I do see Fedora refer to Kickstart: https://fedoraproject.org/wiki/Features/SyslinuxOption This has me wondering if Fedora maintains local changes to the SYSLINUX project. If it does, that further lends to my interest in tracking down the utilized sources. Does anyone have any insight on these topics, or, at the very least, a better forum to pursue them? -- Brian Reichert <reichert(a)numachi.com> BSD admin/developer at large

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Help needed in CentOS 6.7 installation
by Amar 14 Oct '15

14 Oct '15

Hi, I have a high-end (32 GB RAM, 2 TB hard-disk) machine where I wanted to install CentOS 6.7 operating system. I am also using a nvidia 1 GB GPU from ASUS. With all this, I am not able to instal CentOS 6.7, The last message that shows on my screen, when I try installing, is "[drm] Initialized i915 1.6.0 20140905 for 0000:00:02.0 on mirror 1". Any suggestions? Regards

2 1

Firefox Flash Update = No Flash
by pro alias 13 Oct '15

13 Oct '15

None of my Centos 5 boxen can show flash since the update this morning. Am I alone or do other people have this issue ?? Centos 7 boxes work properly. I haven't looked at RHEL 6 boxes yet. Although I miss using flash on these boxes, it IS a great security upgrade....

4 3

Firewalld
by Emmett Culley 13 Oct '15

13 Oct '15

I just noticed that when rebooting a CentOS 7 server the firewall comes back up with both interfaces set to REJECT, instead of the eth1 interface set to ACCEPT as defined in 'permanent' firewalld configuration files. All servers are up to date. By "just noticed" I mean that I finally investigated why a newly rebooted VM failed to allow NFS connections. Prior to doing that. I'd been stopping the firewall to get access, then restarting the firewall after setting the eth1 interface to ACCEPT. This time I took a look at iptables and found that eth1 was set to REJECT, before I stopped the firewall. Because it was obvious that firewalld had been started by systemd by noticing the output of iptabled -nvL had the same set of rules you can see when firewalld is restarted, except that after restart interface eth1 is set to ACCEPT. I assume there must be a different set of configuration files that are accessed upon reboot than those accessed upon firewalld restart. Note that all CentoOS 7 machines (VM and hardware) in our data center have this same issue. Anyone know where and what those files are? Emmett

4 7

Preventing laptop from sleeping when lid closed?
by Dave Johansen 13 Oct '15

13 Oct '15

How can I prevent the laptop from sleeping when the lid is closed. I tried messing with the settings in gnome-power-preferences but that doesn't seem to prevent it when no one is logged in. Any suggestions? Thanks, Dave

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Discuss October 2015