Questions tagged [centos-8]

Version 8 of CentOS Linux distribution (released in September 2019). The CentOS Linux distribution is a stable, predictable, manageable and reproducible platform derived from the sources of Red Hat Enterprise Linux (RHEL).

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not able to mount a directory on stratis filesystem, it keep on throwing error special device does not exist

Unable to mount a directory on Stratis filesystem. While running a mount command it throws error special device does not exist Please notice that I have also tried mounting by making an entry in /etc/...
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Not able to create virtual disk optimizer on CentOS 8

Not able to create virtual disk optimizer on CentOS 8 It keep on throwing error not enough memory space available please see the commands that I have run and the error below: vdo create --name=vdo1 --...
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Mod-Shift-Q Not working in xmonad

I'm just setting up Xmonad, and finding that Mod+Shift+q isn't working. xmonad.hs: import XMonad import XMonad.Config.Gnome import XMonad.Util.EZConfig main = xmonad $ gnomeConfig { terminal=&...
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Where did the /boot/grub2/grub.cfg `linux16` lines go CentOS 8 / Oracle Linux 8 / RHEL8?

In el7 there were lines in grub.cfg like linux16 /vmlinuz to load a kernel and create menu items. In el8, those menu items are not listed in grub.cfg after a grub2-mkconfig -o /boot/grub2/grub.cfg. I ...
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Cant see threads in htop CentOS/Linux

CentOS 9 I want to see CPU usage and context switches by thread (pthread) in my C++ program. I want it with say 1s refresh like htop. I set the names using pthread_setname_np(logger_t, "logger.t&...
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Updating CentOS 8.3 to Stream got Killed in the middle of process

I am in the process of upgrading my DB server from CentOS 8.3 to CentOS 8 Stream. I'm using the regular commands: dnf --disablerepo '*' --enablerepo extras swap centos-linux-repos centos-stream-repos ...
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SFTP prevent user from deleting original directory

I cannot find how to prevent chroot users from deleting some original directory. I have an SFTP that is already working. Below is my process to create a directory for new partners. [root@...]# ...
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Changing the default kernel does not change uname

I have a hetzner server, and I wanted to use wireguard on the server. As shown below, my wireguard module is only available for the kernel version "4.18.0-348.el8.x86_64". $ rpm -ql kmod-...
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Installed php74-php-mysqlnd but module is not available

I am setting up a clean CentOS 8 server and installed PHP using the Remi repositories. In there, it also has a php74-php-mysqlnd package that should be installing the correct .so files, but I do not ...
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Rocky Linux/Centos 8: Why are we unable to switch to a virtual terminal if in X?

We are unable to switch from X to a virtual terminal on Rocky Linux. xmodmap -pke and dumpkeys results are the same as CentOS 7. Ctrl+Alt+F6 on Rocky (below) has no effect. chvt works. Switching ...
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Why is saving downloads to SAMBA share not available in Vivaldi, Thunderbird etc. under Centos 8?

I am using Vivaldi in CentOS 8, and simultaneously have some 'mapped network drives' to a SAMBA share server. Those mappings are not available as save locations in Vivaldi, Thunderbird, and several ...
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How can I start/stop/disable all VNC servers on Rocky Linux/Centos 8 with one command? (TigerVNC)

Previously, wildcards were supported. E.g. sudo systemctl stop 'vncserver@*' sudo systemctl disable 'vncserver@*' Now in Rocky Linux (and Centos-8 should be the same), the users are listed in "/...
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Error unpacking rpm package

I have upgraded just before my centos 7 to centos 8. after a few hours of effort with the guide, I was upgraded. now I am trying to use yum for a couple of dependencies. as I have removed yum I am ...
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how to solve no wifi adapter available in centos8

Im using centos8 in dual boot with windows11 but i've got a problem in the wifi connection i've tried to connect but no device found. i found this article but it's used with ubuntu there's commands ...
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What is the Rocky Linux/Centos 8 equivalent to system-config-printer?

The system-config-printer command is not found and is not available through yum. My program needs to run the system graphical printer setup command. Is "gsd-printer" equivalent? (I am remote ...
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IPv4 DNS address not working, but IPv6 works

my server is not able to resolve hostnames using the IPv4 address of a DNS server. But when I use the IPv6 address of the same DNS, it works properly. This is what happens when I use IPv4 DNS, $ dig @...
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SyntaxHighlight - MediaWiki - Centos 8

So I am using Centos 8 Stream starting from minimal install and I have built a functioning MediaWiki v1.35.4 accessible within my local network with httpd(apache). I am trying to utilize ...
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Deploy/Run an R Plumber API on Linux Redhat Centos 8 server

I built an API using R and Plumber and was wondering how to deploy/Run it on Linux Redhat Centos8. It is a simple REST API and it launches Swagger to run when I test it on my computer, but instead of ...
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ASP.NET Core app hosted on CentOS 8 throws an out of memory exception, but works fine when developing on Windows?

We are using FastReport to generate reports, while we are developing on our Windows machines, it is possible to generate pdf files that are + 10 pages in size, but when we publish this (target runtime ...
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Trouble to install docker on my centos 8 VM

My dev machine is a CentOS 8 VM, and I'm trying to install docker on it, so I can locally create docker images. I'm basically following the docker tutorial here: https://docs.docker.com/engine/install/...
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fapolicyd, adding a program

I'm trying to decipher my audit logs. I'm the only user of the folder but there are several accounts. My server is set up as a webserver with Webmin/Virtualmin. I have several unprivileged accounts ...
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How to install certutil on Centos?

I am trying to get libreswan VPN running on my centos system but I seem to be missing the certutil package /usr/local/sbin/ipsec: line 394: certutil: command not found However I have been looking ...
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CentOS server migration (physical type of migration only HDD)

I need your help regarding "phyisical" migration of the CentOS server. At the moment my CentOS is installed on the C220 Cisco server, but in next couple of weeks I will get another C220 that ...
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Readonly / filesystem immediately after install

I'm using pxeboot and kickstart to automate the installation of CentOS 8. For some reason the resulting systems have a readonly / filesystem after install and its driving me nuts. What might be ...
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Mount overlay before starting services on Centos 8

I'm using centos 8 OS. I need to mount overlay on boot (for example to store /var/log on a different disk) before other services started. My initial implementation was to write a service (/etc/systemd/...
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VPN blocking internet access on my CentOS

I am using CentOS 8 and for some projects I need to connect on a FortiClient VPN. It seems that the configuration of the VPN is blocking my machine to have any internet access other than the VPN. I ...
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CentOS 8, which SVN GUI client can be used on it?

I just installed CentOS 8. I am wondering which SVN client can be used on it? I am using KDESvn on my years-old Fedora. But now the CentOS 8 is the GNOME desktop. How about RabbitSvn? it seems that it ...
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"hostname: command not found" CentOS 8

On CentOS 8 the hostname command was removed. With seemingly no way to get it back. No documented way at least Duckduckgo tells me. The problem with this approach is that the whole world expects the ...
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Try to setup static IP on CentOS

I am very new to Linux based operating systems. I can navigate terminal a little, I know how to "VIM". I am trying to give my machine a static IP. I need to get into and save an edited file ...
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Problems running steam on CentOS

I've installed steam-1.0.0.66-1.el8.i686.rpm on CentOS 8.2 and I am using the latest nvidia driver with cuda 455.32.00 and I get this: [2020-11-12 02:59:20] Startup - updater built Oct 28 2020 23:34:...
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Why i am getting " no soundcards found..." and not getting any sound?

[msingh@localhost KVMfiles]$ aplay --list-devices aplay: device_list:272: no soundcards found... [msingh@localhost Extrasoftware]$ lspci -v | grep -A7 -i "audio" 00:1f.3 Audio device: ...
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Centos Stream vs Centos linux?

I have been using centos as my desktop environment, now there are two versions of centos available for download. Centos stream vs centos linux. As per google centos stream is basically used for ...
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Why Centos 8 iso images doesn't boot as a CD in Virtualbox?

I'm trying to install Centos 8 on Virtualbox in Windows. When loaded in the virtual CD drive, the official .iso doesn't boot. I got the message : "FATAL: No bootable medium found! System halted.&...
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How should a dhcp server allocate only one ip address?

How should I configure the dhcpd.conf file so the DHCP server would allocate only one IP address from a subnet to the first VM that is connecting to the DHCP server? Thank you. Operating system: ...
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What is “/dev/ploop15234p1” on my VPS?

After transferring some big files to my VPS I started getting "No space left on device". Even though du -sh / showed I had plenty of space, df -h reported differently: Filesystem ...
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CentOS 8.2 failing to boot on VirtualBox

I'm trying to install the latest CentOS, 8.2.2004, on VirtualBox and it's failing at this point: I have tried the three images, dvd, boot and minimal, same results. The full VirtualBox config is: ...
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Trouble with installation of Steam on CentOS 8

After updating graphics card and during installation of Steam on CentOS 8 I get: [root@comp pawel]# yum install epel-release Error: Problem: conflicting requests - nothing provides ...
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R "RPostgrSQL" package fails to install on Centos 8 (as `lib` is unspecified)

I want to install the R package RPostgresql to connect to my PostgreSQL database called "crex" on Centos 8. When I run > install.packages("RPostgreSQL") in the terminal I get ...
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CentOS 8 auditd AVC denials message flood caused by denied setuid

Today my CentOS 8 suddenly frozen and not responding to user inputs. When I tried to login from console, I saw messages like these: audit: backlog limit exceeded audit: backlog limit exceeded audit: ...
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Why am getting authentication error for connecting to wifi via wifi adapter with correct password?

(base) [msingh@centos rtl8192eu-linux-driver]$ sudo nmcli --ask dev wifi connect ACT103292835565 Password: •••••••••••• Error: Connection activation failed:(53) The Wi-Fi network could not be found (...
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Testing syslog-ng on CentOS 8

I am relatively new to Linux and networking but was tasked with the following at work: I built up a CentOS VM machine ( using VirtualBox) on which I had to install Splunk Heavy Forwarder and syslog-ng....
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CentOS 8.2 does not boot after updating in 1 Aug 2020

I updated my CentOS 8.2 yesterday (yum update), everything was good until a rebooted my system, there was no boot loader! the system get stuck in a black window without showing anything at all.indeed ...
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Two Interfaces and lost packages

I have two ethernet interfaces named enp1s0f0 and enp1s0f1. They have ip addresses from same subnet (don't think it matters tho). Here is scenario: My distro is Centos8 I have done "echo 1 > /...
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How to install jsoncpp on CentOS 8

I have tried: $ sudo dnf install jsoncpp Last metadata expiration check: 0:31:37 ago on Fri 17 Jul 2020 02:02:47 PM CST. No match for argument: jsoncpp Error: Unable to find a match: jsoncpp And I ...
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Packer Digital Ocean FIPS Mode cannot ssh

I'm using Packer to build a Centos 8 box on Digital Ocean with FIPS mode enabled. # setup.sh script fips-mode-setup --enabled Then I use Terraform to provision an Droplet with that new image, and ...
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Centos 8 Suspend/Sleep on inactivity

I have setup a Centos 8 workstation and have not found any way to get it to sleep even after lots of googling around. How do I get it to sleep on inactivity, and get it to Wake-On-Lan?
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Problems with Bridged Network Adapter in VirtualBox 6.1

I have tried other questions & answers in Stackoverflow, but none of the answers worked for me and also the answers were for older version of VirtualBox or for different OS Hosts. So i'm raising ...
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MDADM 5 Disk RAID 10 no spare device created

Created a 5 disk RAID 10 by runningmdadm --create /dev/md0 --level=10 --raid-devices=5 /dev/sdb1 /dev/sd[d-g]1 and because it was an odd number I expected 1 disk to become a spare device. However ...
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How to fix dnf install on Centos 8

I need this command to work: $ dnf install postgresql12 Now it raises an error: No match for argument: postgresql12 Error: Unable to find a match: postgresql12 However, if I specify repo, it ...
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Hotkeys not working on ZAReason laptop in CentOS 8

I was rather excited to put a new SSD into my ZAReason laptop and install CentOS 8. After everything else is working great, I noticed that the hot buttons above my keyboard do not work other than ...
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