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centos 6 vs 7
by Divine Tanyingoh 02 Apr '20

02 Apr '20

Issue: After installing vms on vmware, I noticed a difference in behavior between centos 6 vs 7. On centos 6 I cannot ping the hostname and get a reply without first resolving in the /etc/hosts file by adding a new entry: 192.168.0.47 server1.example.com. But for centos 7 I am able to ping the hostname and get a reply even when I have not made any changes to the /etc/hosts file. Why is there this difference between centos 6 vs 7. Thank you for your assistance.

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Qemu guest(s) in bridge mode cannot see host machine.
by Jerry Geis 31 Mar '20

31 Mar '20

Hi All - I have a Win10 and Centos 8 guest both that bridge mode does not see the host- other computers seem ok. They cannot even ping the host. My host is CentOS 7. I did some searching - I see the issue - but not what was done to resolve it ? Thanks, Jerry

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mlocate-updatedb.timer not working?
by Frank Cox 31 Mar '20

31 Mar '20

I set this computer up with Centos 8 a few days ago. "systemctl status mlocate-updatedb.timer" says "Active (waiting)". But the mlocate database hasn't been updated since the last time I ran updatedb manually. # ls -l /var/lib/mlocate/* -rw-r-----. 1 root slocate 22944208 Feb 29 10:30 /var/lib/mlocate/mlocate.db What have I missed? -- MELVILLE THEATRE ~ Real D 3D Digital Cinema ~ www.melvilletheatre.com

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Problem installing bind-dyndb-ldap
by Michal Zacek 31 Mar '20

31 Mar '20

Hello, is there a way, how to avoid this stupid "module" problem? Google didn't help, except it is quite common at Centos 8.1. [root@centos8 ~]# dnf install bind-dyndb-ldap ..... Running transaction check No available modular metadata for modular package 'bind-dyndb-ldap-11.1-14.module_el8.1.0+253+3b90c921.x86_64', it cannot be installed on the system [root@centos8 ~]# cat /etc/redhat-release CentOS Linux release 8.1.1911 (Core) Thanks, MZa

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Versions in RHEL and CentOS
by Thomas Stephen Lee 31 Mar '20

31 Mar '20

Hi, I had a doubt regarding RHEL/CentOS Versions. https://access.redhat.com/support/policy/amd in the he Notes No (8) says "Update 2 of Red Hat Enterprise Linux 8" does it mean it will appear in CentOS 8.2, or is already there from 8.0 ? thanks -- Lee

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CentOS 8 Gstreamer and Mplayer
by Mark LaPierre 31 Mar '20

31 Mar '20

Hey Y'all, What replaced Gstreamer and Mplayer in CentOS 8. RPM finder finds both for CentOS 6 and 7 but not 8. There must be a replacement for them but I don't know what. I appear to be having codec issues but, not knowing what's supposed to handle the jobs that the two programs used to do, I don't know where to look for a commercial set of codecs compatible with the application. I'm getting error messages, "No video with supported format and MIME type found." when visiting certain web sites with Firefox. I would try it with Chrome but that does not appear to be available in the CentOS 8 repos either. I found solutions to this issue on the net that involved turning off HTML5 direct rendering and using Flash, but that's not going to happen. -- _ °v° /(_)\ ^ ^ Mark LaPierre Registered Linux user No #267004 https://linuxcounter.net/ ****

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Re: [CentOS] CentOS 8 Gstreamer and Mplayer
by Mark LaPierre 31 Mar '20

31 Mar '20

On 2020-03-30 00:13, Ted Miller wrote: > I have generally found that installing VLC takes care of my codec needs. > Have not tried it on Centos8 yet. > Ted Miller > > > On 3/29/20 11:18 PM, Mark LaPierre wrote: >> On 2020-03-29 18:42, Frank Cox wrote: >>> On Sun, 29 Mar 2020 18:34:20 -0400 >>> Mark LaPierre wrote: >>> >>>> What replaced Gstreamer and Mplayer in CentOS 8. RPM finder finds both >>>> for CentOS 6 and 7 but not 8. There must be a replacement for them but >>>> I don't know what. >>> >>> rpmfusion might be what you're looking for. >>> >> >> I'm assuming that rpmfusion is a repository that I have to set up on >> my new squeaky clean freshly installed machine and then proceed to >> pollute it with questionable packages. ;-) >> >> I'll look into that tomorrow. >> >> What I would really like to know is, were these applications replaced >> with something else that I should be using instead? >> >> Thank you for responding. I really do appreciate it. >> > > The box says, "No match for argument: vlc Error: Unable to find a match: vlc" Perhaps there's another repo like epel for CentOS 8 where these toys live? -- _ °v° /(_)\ ^ ^ Mark LaPierre Registered Linux user No #267004 https://linuxcounter.net/ ****

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Some problems with Unbound under CentOS8
by Carlos Lopez 30 Mar '20

30 Mar '20

Good morning, I have detected two strange problems with unbound under CentOS8 (fully patched). I have tried same configuration in an OpenBSD host, and these problems do not appear. a/ Error mesage “connection refused”. I am using this unbound server to resolv DNS records for our internal domain (Bind9 is configured to listen in localhost interface, port 5353 udp and in the same host where unbound runs). When I try to run a nslookup query like this: > set q=any > my.internal.dom ;; Connection to 127.0.0.1#53(127.0.0.1) for my.internal.dom failed: connection refused. > And I don’t understand why. Bind9 resolves this without problems, but unbound returns connection refused. Unbound is configured to listen in 0.0.0.0 and allow all connections (access-control: 0.0.0.0/0 allow). The strange thing is that it only happens with that kind of request, any other request works fine. b/ Unbound tries to connect to Root DNS servers directly. Every time unbound starts, it tries to connect to root DNS servers directly and not through internal DNS. I am using a second unbound server as a cache nameserver in a DMZ zone and unbound anchor timer service is disabled. My forward config is: forward-zone: name: "." forward-addr: 172.22.54.6@53<mailto:172.22.54.6@53> Any idea why these problems occur? -- Regards, C. L. Martinez

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Upgrade to CentOS8
by Patrick DERWAEL 29 Mar '20

29 Mar '20

Hi folks I have a couple of Zotac mini PCs running CentOS7 which I want/need to upgrade to CentOS8 In theory, they are CentOS8 capable, but assuming Murphy might be lurking around, I prefer validating the hardware before starting the effective installation As there is no LiveCD, what would be the recommended way to do this? Thanks! <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

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Need help to fix bug in rsync
by Simon Matter 28 Mar '20

28 Mar '20

Hi, I've discovered a bug in rsync which leads to increased CPU usage and slower transfers in many situations. When syncing with compression (-z), certain file types should not be compressed during the transfer because they are already compressed. The file types which are not to be compressed can be seen in the man page section --skip-compress. Unfortunately skipping the default file types doesn't work and all transferred data is being compressed during the transfer. This is true for all versions since 3.1.0. Steps to Reproduce: 1. run 'rm -f Z ; rsync -azv alpha:z.gz Z' Actual results, transferred data was compressed during the transfer: sent 43 bytes received 63,873 bytes 25,566.40 bytes/sec total size is 628,952 speedup is 9.84 Expected results: No compression should happen for .gz file. Additional info: Note that the source file 'z.gz' was an ascii text file to show clearly that compression took place. Please the following BZ for more info: https://bugzilla.samba.org/show_bug.cgi?id=14323 https://bugzilla.redhat.com/show_bug.cgi?id=1816528 I tried to locate the bug in the code but failed. That said I'm not a C developer and therefore need some help from someone who understands C better than me. Any help is much appreciated! Thanks and kind regards, Simon

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