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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Transmission not working on xrdp, how to set that?

I am trying to use GUI version for centos 8. But, on cloud machines, they provide only command line version. So installed xrdp and other GUI prerequisites and and connected using Remote Desktop. But ...
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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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Installing Kile latex under CentOS 8

I've installed Kile under CentOS 8, but after running Kile system test I got missing converter option (i. a. pdf -> png). The live preview doesn't work. How to fix it, properly install Kile under ...
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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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CentOS 8 how to save and restore terminals and running apps on reboot

Is there a way to save and restore terminals and running applications on reboot on my CentOS 8 machine? I need to reboot my machine several times a day I don't want to reopen everything, again and ...
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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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How to use different network interfaces for different users?

I am running a CentOS 8 server where I have a VPN interface tun0, I also have a user vpn. What I want to do now, is to make sure that the only possible network to use for vpn is tun0. For all of the ...
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multisite in apache/httpd in centos 8 : out of three sites, two sites pointing same folder

I am trying configure multisite in centos 8 in Digital Ocean in Apache server, also called httpd for centos. I am following this tutorial. but skipped the permission and SELniux part. The three sites ...
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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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Running KVM on a Ubuntu 18.04 server with a bridged network

I have a KVM system running on an Ubuntu 18.04 server with the networking bridged to enable connectivity to the guests from the outside network. The problem I am running into is that the guests do not ...
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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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how to apply custom gnome shell extension for all users

I'm a centos 8 desktop user and I would like to install some gnome-shell-extensions by default when pre-created desktops, I found this guide: https://help.gnome.org/admin/system-admin-guide/stable/...
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Can nft NAT work when firewalld is disabled? Centos8

If there is a nat service running via nft on a machine, can the firewalld be disabled with nat still functioning? Are the two services needed by each other or can they work separately from each other?
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wget - CentOS 8 Repo mirror

I am setting up an Ubuntu server to work as a repository for both apt and yum, and I'm running into some problems getting the CentOS 8 files to download for some reason.. I have a crontab with the ...
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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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How to store emails in each user folder on POSTFIX mail server

I am using cantos 8 i installed post-fix and dovecot for mail server. When i try to send emails to my email server, all emails going to my root folder.My post-fix main.cf file i set the mail directory ...
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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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Glibc installation Winstars3 on CentOS 8

I tried to run WinStars 3 on CentOS 8 and I get: [root@comp WinStars3]# ./WinStars3.sh /opt/WinStars3/./WinStars3: /lib64/libm.so.6: version `GLIBC_2.29' not found (required by /opt/WinStars3/./...
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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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Migrate these Wireless LAN security settings from Windows 10 to CentOS

The following security settings for a wireless network connection are configured on a Windows 10 machine. How do I configure this connection on a CentOS 8.2 machine? I have already imported the ...
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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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263 views

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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Desktop shortcuts not working CentOS 8

I have created several .desktop files (shortcuts) of Application type on Desktop in CentOS 8. But they don't display the icon and I can't launch them from Desktop (I enabled "Show icons on ...
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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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Centos8/RHEL8 firewall-d external zones - opening ports and Port Forwarding not working

I have a complex home setup lab, it has some 9 machines and several networks. My gateway to the outside world is a dual WAN Centos8 machine running an External Zone on two interfaces and a Trusted ...
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syslog-ng configuration using variables to create directories for different sources that feeds their logs into syslog-ng

I've got the following syslog-ng configuration and after having tested it with loggen command (to generate traffic) it works and write logs to the destinations files. @version: 3.23 @include "...
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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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CentOS 8 Minimal Install on VirtualBox - Cannot Run Installer

I pulled down the ISO from an accredited mirror on the CentOS site. I verified the SHA256 hash, and I attached the ISO to a VirtualBox VM (Host-Only and Nat Network, 2 NICs; 1CPU, 1GB RAM, 8GB VDI). ...
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How to add a repository with Ansible on CentOS 8?

In CentOS 7, Ansible has the yum-repository module that can be used for adding repositories. In CentOS 8 there exists the dnf module for package management, but there doesn't seem to be a dnf-...
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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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cannot find samba on local network, runing on proxmox lxc centos container

I have a server with proxmox on ip 192.168.0.200 with a unique lxc container (privileged) on ip 192.168.0.254 running centos 8 and samba server installed on it. Configuration done on centos: users ...
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Issue with adding an Applications menu category and item to launch an interactive bash script in terminal window on CentOS 8 workstations

I have an interactive bash script that I need for all of my employees to launch from the CentOS 8 / Gnome "Applications" menu on all of their workstations, but I cannot seem to get the ....
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CentOS on QEMU can't resolve domain name with nslookup

I can't resolve domain names with nslookup on CentOS 8 emulated by QEMU. I would like to know the cause, and how can I properly set up DNS resolution for this environment. # nslookup stackoverflow.com ...
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Can you format and use a MDADM array while its building?

The MDADM array was created and is in the process of resyncing. Is it possible to format the drive and use it while it is doing this. Is the same true if I put LVM over it?
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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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Unable to boot into CentOS installed on external hard drive

I created a CentOS bootable disk for installing CentOS onto my external hard drive. I was successful on installing it onto a partition created for the same on the external hard drive, but when I tried ...
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380 views

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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What format/encoding is the Dovecot Diffie-Helman params file?

I'm stuck on Dovecot 2.2.x because 2.3 package isn't available yet for CentOS 8.x, and I don't want to custom build in this use case. Further, I'm bootstrapping this machine in order to snapshot 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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Jumbo Frames not sliding for CentOS 8 gues on Hyper-V

Have a super strange issue. Any CentOS 8 guest I build on one of my Hyper-V servers with MTU 9000 (Jumbo Frames) Has extremely poor performance when accessing the internet (being less than 9K MTU). ...
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CentOS not finding wifi adapter

I installed CentOS on a Lenovo yoga laptop a few days ago, but I cannot get the wifi to work. I've tried lots of things following suggestions from replies to several questions on different sites. ...