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Questions tagged [centos8]

267 questions
30
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4 answers

No network connectivity to/from Docker CE container on CentOS 8

I just installed the latest release of docker-ce on CentOS, but I can't reach published ports from a neighboring server and can't reach the outside from the container itself. Running a plain vanilla CentOS 8 with NetworkManager and FirewallD…
Saustrup
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3 answers

How do I update a system from CentOS 7 to CentOS 8?

Assuming that reinstalling from zero is not practical, how do I perform an update from CentOS 7 to CentOS 8? I tried to do a yum install http://mirror.bytemark.co.uk/centos/8/BaseOS/x86_64/os/Packages/centos-release-8.0-0.1905.0.9.el8.x86_64.rpm but…
sorin
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9
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1 answer

firewalld is not working in CentOS 8: no rule at all is created in iptables

I've recently upgraded a clean install CentOS 7 to CentOS 8 using this tutorial: https://www.tecmint.com/upgrade-centos-7-to-centos-8/ I had no extra software installed, only the base install. After upgrading, the first thing I tried to do was to…
Rodrigo Renie
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8
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6 answers

Yum on Centos 8 - Failed to download metadata for repo 'AppStream'

I'm on a fresh Centos 8 install and have tried to use yum for the first time (on this machine). I get the following for any attempt to install or update anything: yum update CentOS-8 - AppStream 0.0 B/s | 0 B 00:00…
Imag1ne
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7
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7 answers

Can't mount CentOS NFS share on Windows 10 - "Network Error - 53"

I have a CentOS 8 virtual machine (192.168.10.203) running nfs-server, and I'm trying to mount the share on my Windows 10 Pro x86_64 machine (192.168.10.10) I have installed the "Services for NFS" Windows feature), but when I run mount…
rst-2cv
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5
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4 answers

Creating a bridged WiFi AP (hotspot) in Centos 8 (or Fedora)

I am trying to create a bridged WiFi hotspot on a Centos 8 system, using NetworkManager. The machine is Dell EPC3000, with two built-it GigE's and ath10k wireless adapter, plus an LTE WWAN. Creating a NATted hotspot works nicely: nmcli con add type…
Pasi Hurri
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5
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2 answers

Failing to run yum update in CentOS 8

I want to preface this post with this disclaimer: I am somewhat unfamiliar with how yum functions and I am also unfamiliar with the details of the changes that are required since CentOS 8 became EOL. About a month back, my container build was unable…
ground_beef_n_stuff
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5
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1 answer

What replaces "ntpq" in CentOS 8?

I want to install this utility ntpq as described here: https://www.cyberciti.biz/faq/linux-unix-bsd-is-ntp-client-working/ It prints all connected NTP servers and various NTP sync measurements. Cant find it for Centos.
Boppity Bop
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4
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2 answers

How to determine if my CentOS 8 is vulnerable to CVE-2019-18348

I am a long-time linux sysadmin, but new to CentOS. I just need to determine if this CentOS server is vulnerable to CVE-2019-18348. To do that, I have to either verify the packages installed are patched, or have a way to test for the vulnerability…
user1522091
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2 answers

Ansible Centos 8 dnf module "module" switch missing?

I'm trying to use the dnf module of Ansible with the module switch to install PHP 7.4 from the remi repo. I'm doing this as a command, as I can't get it to work using Ansible dnf. This is what I want to do: dnf module -y install php:remi-7.4 I can't…
Deaton
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4
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2 answers

dnf - cannot install the best candidate for the job

I just installed CentOS8... $ cat /etc/redhat-release CentOS Linux release 8.0.1905 (Core) $ ... and now trying to follow Get Docker Engine - Community for CentOS | Docker Documentation, yet running into following error: $ sudo dnf install -y…
alexus
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4
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1 answer

"dnf update" vs. "yum update" command differences in CentOS Linux?

Does anyone know what's the difference between the below command in CentOS Linux ?: dnf update yum update Which one is better to use with Cron as automated OS update? Thanks in advance.
Senior Systems Engineer
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0 answers

CentOS8: podman with enabled firewalld breaks DNS for container

I just have started using CentOS8 + podman in scope of migration from CentOS7 + docker. The issue is the following: When firewalld is stopped - DNS works fine inside container: [root@dev1 ~]# systemctl stop firewalld [root@dev1 ~]# podman run -it…
AndrewG10i
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3
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0 answers

CentOS Linux 8 freezes when changing SELinux Booleans (setsebool)

Problem Various CentOS Linux 8 servers freeze/hang when changing SELinux Booleans. Details and research We manage hundreds of CentOS Linux servers. Lately we see deviant behavior on some (but not all) servers when changing SELinux Booleans. Just…
acropia
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3
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2 answers

Centos 8 Stream EOL

I see here that EOL for Centos 8 Stream is 2024-05-31. Probably I'm not getting something but I understand it is upstream of RHEL 8 which has EOL in 2029. What's happening in 2024?
nestven
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