Discuss April 2021

discuss@lists.centos.org

76 participants
49 discussions

MATE 1.20 test build for CentOS 7 available
by Greg Bailey 14 Oct '21

14 Oct '21

Hi everyone, There's been discussions in the past about updating MATE RPMs in EPEL-7: https://bugzilla.redhat.com/show_bug.cgi?id=1436260 https://lists.centos.org/pipermail/centos/2019-August/173154.html (and lots of others...) As a proof-of-concept, I've written some scripts that clone specific commits from the Fedora master branches, and then runs a tool to re-apply RPM scriptlets that are required by EL7 but removed from the Fedora .spec files. The scripts are available at: https://github.com/gebailey/mate-rpms/tree/master/1.20/el7 There's also instructions there if you want to try upgrading to MATE 1.20 w/o rebuilding them yourself. If these packages work for others, perhaps we can revisit the idea of updating the epel7 branches of the Fedora git repos and submitting an official update. There's nothing here (yet) about building MATE 1.22 (which might require a newer gcc for EL7), or building anything on CentOS 8, but thought the CentOS 7 users might find this helpful. -Greg

6 17

Transition test report going from CentOS8 to Debian 10.
by Lamar Owen 06 Aug '21

06 Aug '21

Sorry for the length.... I'm posting this here since this particular transition has been mentioned on-list as one possibility for a path forward for current CentOS Linux users. AlmaLinux, the Developer Subscription RHEL, Rocky, CentOS Stream, Springdale, upgrading to full RHEL; all these are also possibilities, too, and all have different strengths and weaknesses. The transition to Debian has a lot of strengths, including a long track-record of support (even if the support time for a particular release is shorter), a fully-open development model with no 'corporate overlord' that I know of, a large set of supported packages, and a huge community of developers and users. For the CentOS user the main weakness is having to learn a few areas of difference in the way the system is setup and maintained; of course, if a ten-year 'stable' timeframe is really that important to you the lack of that is also a weakness. So, last week I transitioned, as a test of sorts, my working CentOS 8 main laptop to Debian 10. I kept a complete backup of the C8 install should I wish to go back to it, and installed Buster to a new mSATA SSD, but ported the two SATA drives (Dell Precision M6700 - has an mSATA slot plus two SATA bays) straight over after making full backups. I posted a pretty complete rundown on the scientific linux users mailing list, so I won't recap it all here. The bottom line was the the transition was not any more difficult, really, than moving from CentOS 7 to CentOS 8. The software versions in Buster are pretty close to what is in CentOS 8, although I have yet to need any third-party repository (PPA) for anything I've needed to install. All the packages I have worked with so far have worked fine with a little bit of massaging. These include commercial (and costly) software such as Harrison Consoles' Mixbus32C, Qoppa's PDFStudio2019 Professional, and others. So if you were to decide that this is the route for you to take, it does work and I found it to be not nearly as hard as I had thought it might be. If you install GNOME 3 you get GNOME 3; it feels pretty much the same as a non-Classic CentOS GNOME 3, just with a different set of extensions installed by default. That's on the workstation. On the server side, I'm evaluating Proxmox for the virtualization solution, and so far I'm finding it to be a pretty easy migration. I'm using the 'non-subscription' repository, so this is a no-cost option. Even getting the box registered to our EMC Clariion SAN was relatively easy; EMC provides the Unisphere Server Utility for Linux x64 in RPM form; the latest I have is "ServerUtil-Linux-64-x86-en_US-1.0.55.1.0044-1.x86_64.rpm" (which is fairly old, but I did say Clariion arrays, so they're pretty old, too). Debian has provided the 'alien' tool for some time; after installing alien, a simple 'alien -i ServerUtil-Linux-64-x86-en_US-1.0.55.1.0044-1.x86_64.rpm' installed the EMC RPM in the correct place. Proxmox already included everything that serverutilcli requires; on a plain Buster install I had to install dm-multipath and the device mapper libraries and tools before serverutilcli would find the arrays; but it ran just like it did on CentOS 8 (and 7). I haven't decided whether to stay on Debian or not; too early to tell. I have time to test and evaluate. My CentOS 7 installs aren't goin anywhere, though, at least until late 2023. And I've registered for a Developer subscription of RHEL so that I can properly evaluate that option, too. This is the beauty of open source: we have OPTIONS.

11 23

Centos versions in the future?
by Carlos Oliva 09 Jul '21

09 Jul '21

Will there be newer versions of Centos? We have heard rumors that version 8 will be the last one. We are concerned with using an OS that will loose support in the future. Thank you.

29 107

ipforwarding -- routing
by R C 11 May '21

11 May '21

Hello, I have an accesspoint, that I connected to one ethernetport, the ap has ip 192.168.67.6, the port 192.168.67.1 I want to forward/route traffic for anything in 192.168.66.0 to go to that access point, and from the ap to the other port. What is the best way to do that? I tried: sudo sysctl -w net.ipv4.ip_forward=1 sudo firewall-cmd --direct --add-rule ipv4 filter FORWARD 0 -o eno1 -i enp0s20u4u1 -j ACCEPT sudo firewall-cmd --direct --add-rule ipv4 filter FORWARD 0 -o enp0s20u4u1 -i eno1 -j ACCEPT but that doesn't seem to work. thanks, Ron

2 1

CentOS are Debian / Ubuntu mirror
by Rudi Ahlers 06 May '21

06 May '21

Hi, Does anyone have some instructions on setting up a CentOS server as mirror for Debian and Ubuntu distributions? I already setup a YUM mirror and this works fairly well, but cannot seem to figure out how to mirror Debian and Ubuntu repositories. -- Kind Regards Rudi Ahlers Website: http://www.rudiahlers.co.za

5 13

video driver for NVIDIA Quadro
by R C 01 May '21

01 May '21

Hello, I am running Centos/RHEL 8 on a Dell precision M6800/6700 with a: NVIDIA Corporation GK104GLM [Quadro K3100M] Is there a driver for that one? or am I stuck with nouveaux ? thanks, Ron

7 16

ipforwarding between interfaces and firewall rules
by R C 01 May '21

01 May '21

Hello, I have a machine I am running Centos/RHEL 8 on. there are two interfaces and I want to forward all traffic between those interfaces (for the src and dst in the subnet a wireless device is on). One interface is connected to a switch, WAN side. The other ethernet port has an access point, connected wired. I did turn on ipforwarding, and thought I needed only two firewall rules. sysctl -w net.ipv4.ip_forward=1 firewall-cmd --direct --add-rule ipv4 filter FORWARD 0 -o eno1 -i enp0s20u4u1 -j ACCEPT firewall-cmd --direct --add-rule ipv4 filter FORWARD 0 -o enp0s20u4u1 -i eno1 -j ACCEPT However, when I try to do a DNS lookup, it looks like it is being blocked/stopped by the firewall, because when I stop the firewall, it just seems to work. With the firewall up and running, however I can ping an ip address. for example; if I do "ping www.google.com" I get a "ping www.google.com: Name or service not known" If I use an IP address (from www.google.com), it just works. what am I missing (probably a rule in the firewall?) thanks, Ron

3 4

World clocks on CentOS 8?
by Mathieu Baudier 27 Apr '21

27 Apr '21

Hello, I am using CentOS 8 Streams + GNOME, and I cannot find the world clocks anymore (in order to add various cities and their current time). It used to be under the calendar, when one clicks on the time on the top bar. I cannot launch 'gnome-clocks' from the command line, and package search (with EPEL enabled) doesn't provide any results : $ sudo dnf list gnome-clocks Error: No matching Packages to list $ sudo dnf list *clock* Error: No matching Packages to list Was this software removed? Thank you! Mathieu

1 0

Problem with RequiresMountsFor defined in a systemd service
by Carlos Lopez 24 Apr '21

24 Apr '21

Hi all, I have setup a systemd service that needs to mount a NFS share before starts. To accomplish this I have defined: RequiresMountsFor=/data/sysos As a dependency in [Unit] section but it doesn’t work. NFS share is defined in fstab with “defaults,noauto” options also .. What am I doing wrong? How can I debug this? Best regards, C. L. Martinez

4 3

password algorithm with authconfig vs authselect
by Leon Fauster 21 Apr '21

21 Apr '21

In the old days I could do # authconfig --passalgo=sha256 --update With EL8 comes authselect now (replacement of authconfig). authselect --passalgo=sha512 --update does not work and seems to be unsupported. # grep -R passalgo /usr/lib/python3.6/site-packages/authselect/ /usr/lib/python3.6/site-packages/authselect/authcompat_Options.py: Option.UnsupportedValued ("passalgo", _("<descrypt|bigcrypt|md5|sha256|sha512>")), How does the new "way" looks like (>=EL8), to switch the password algorithm? Any hints would be great ... -- Leon

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Discuss April 2021