Questions tagged [centos8]

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Authenticating Domain Users Using PAM Samba AD DC centos 8

I have a Domain with Samba ADDC on CENTOS8. It's work perfectly but I can't authenticate domain users in ssh and su on the local machine .. Do you know how to do it ? I have tried by modifying the ...
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1answer
17 views

KVM/QEMU CentOS 8 kickstarted VMs have broken networking, are unreachable

I can't understand why the VMs I create using virt-install & kickstart do not have networking that can be accessed reliably from foreign hosts. The VMs I created using virt-manager can be logged ...
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23 views

Why I can't define a DNS to docker

I will try to summarize my problem as accurately as possible. I have to install Gitlab on a machine that has CentOS 8 and install it as a docker container. So far everything was going well, I was able ...
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Unstable CIFS mount on CentOS 8

We recently created several centOS 8 serveur for running some springboot applications, which mount several directories from a windows server. Mount is working, but we are getting lots of errors at ...
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54 views

gammu 1.42, gammu-smsd service error, LD_LIBRARY_PATH not found

I'm trying install Gammu 1.42 to serve my SMS gateway on Centos 8. make, make test, make install works fine. LD_LIBRARY_PATH configured in /etc/profile as: ...... LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/...
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passenger_wsgi.py error in apache django vps

I have am trying from last three days to configure simple django application on my vps using plesk with centos 8 , and its been very frustrated to do it. I am receiving passenger_wsgi.py error . I ...
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30 views

reach nat defualt gateway from same interface

I created a NAT to forward traffic from one interface network to the other. The NAT default gateway works on other machines on the network (that have gateway set to NAT machine IP) but the NAT routing ...
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1answer
45 views

Ansible server can't ssh to CentOS 8 machine through -m ping

Currently i'm working on an Ansible server that has 4 hosts (3Ubuntu and one CentOS). I can SSH to them without problems. But when i try to run: ansible servers -m ping this wel be the output: user4@...
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11 views

MariaDB Monitor does not switch between servers because of null GTID

I am currently working on creating a database cluster with 2 servers running CentOS 8, they are running mariadb 10 with MaxScale 2.5.4 running MariaDB monitors on both servers. The servers both up and ...
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42 views

Updated from CentOS 7 to 8 and broke everything

Everything was going smoothly until I decided to run dnf update and saw.. A lot of errors. They were all related to dependencies of things that needed to be installed that had mismatched versions. So, ...
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18 views

lvextend New size matches existing size

I added 500GBs of space to a virtual disk that I am trying to add to a volume group in Centos 8. When I run lvextend -An -l +100%FREE /dev/mapper/cl_elk/root I get New size (9692 extents) matches ...
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26 views

Switch to failover IP instead of main IP for all HTML requests?

I'm using Centos 8 and with my luck, my main IP is blacklisted on an API I'm trying to use. I have 3 failover IP addresses however. Is it possible for me to use one of these failovers instead?
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54 views

screen inside systemd daemon on CentOS 8

So I want to run screen inside a systemd service so that I can give the process (inside the daemon) commands while it is running. See at the end of the question for examples of what I want be be able ...
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14 views

Route all outgoing traffic (Example: HTTP request) through failover IP?

My server is currently making requests on an API, but the address is rate limited due to an internal mistake that over-queried resulting in a week rate limit. In the meantime, I would like to contact ...
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1answer
145 views

kdump not saving to /var/crash on Centos 8.1 server

I am trying to test the kernel dump using echo 1 > /proc/sys/kernel/sysrq ; echo c > /proc/sysrq-trigger command. On some servers, I can get the dump and on some servers I don't see anything. ...
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21 views

Centos 8 - Can't parse HTML files as PHP without a file download occuring

I'm migrating a site from a Centos 7 server to a Centos 8 server. The site has PHP code in files with a HTML extension, usually I use this in a htaccess file: RemoveHandler .html .htm AddHandler ...
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1answer
22 views

centos 8 ssh remote server asking password despite PubkeyAuthentication yes

I am trying to connect remote host from client computer without password (with password works perfectly) On client computer I did following but when I try to connect ssh, still asking password. anyone ...
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89 views

CentOS 8 - uninstalled python, How to recover laptop?

Yes I know I'm an idiot, I just need help I have a laptop running centOS 8 and I was trying to set another default version of Python. Long story short I used sudo dnf remove python and my laptop ...
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27 views

What's the best approach for managing Apache virtual hosts configuration files on CentOS?

Personally, I place all my vhosts configuration files in /etc/httpd/conf.d/vhosts/. There're certain users that like to mimic the environment of debian/ubuntu by creating folders like site-enabled and ...
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20 views

RHEL8 Limits not applied when setuid is configured

I have configured my limits.conf file to allocate a huge stack size * soft stack 65535 * hard stack 65535 ulimit -s shows the correct value for both root ...
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9 views

Open port on Centos 8 [duplicate]

I am trying to run a service on port 61009 on localhost on centos8, but getting connection refused. I tried opening the port using firewall-cmd command. The output of the firewall-cmd --list-all looks ...
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1answer
51 views

CentOS 8 Chrony - how to query servers for time difference?

We are moving from CentOS 7 to CentOS 8 for our monitoring servers (Zabbix) and we use ntpdate to query for time to detect if our local time provider for all devices (Cisco device) hasn't started ...
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1answer
51 views

Google Compute - CentOS 8 PAM Authentication Fails After Update

I have a Google Cloud project on which I'm unable to access a CentOS 8 VM. It is running kernel version 4.18.0-193.19.1.el8_2.x86_64 on an x86_64. I'm also running with selinux enabled. Before running ...
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1answer
45 views

Issues Upgrading httpd from 2.4.37 to 2.4.46

I removed httpd 2.4.37 and tried to install 2.4.46 from raven-extras repo but the package is not showing it just says the following All matches were filtered out by modular filtering for argument: ...
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60 views

broken dnf in CentOS 8

I keep getting the following error whenever I do a dnf update -y or try to install a package. I'm using CentOS 8 as a virtual machine. Can you tell me why this is happening? Traceback (most recent ...
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19 views

AWS SES and Postfix multiple credentials

I'm on CentOS 8 and I kind of set up a server with postfix to relay to AWS SES, and I'm wondering if it would be possible to add more credentials than the one in this guide? Maybe add another line on /...
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1answer
45 views

Remi: Which repository contains what?

If I add the remi repository with dnf install https://rpms.remirepo.net/enterprise/remi-release-8.rpm I get 3 files in /etc/yum.repos.d that declare following repositories: remi-modular remi-modular-...
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46 views

ldapsearch fails on centos8 with Google LDAPS but works on Ubuntu 20.04 with work around

My end goal is to use sssd and Google LDAPS but can tell if things will work with ldapsearch. Google LDAPS requires the Server Name Indication (SNI) extension. I have it working on Ubuntu 20.04 with a ...
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1answer
69 views

How to run Kubernetes without external DNS - Hostname could not be reached

I am installing a k8s cluster on CentOS 8 Hyper-V virtual machines. I used my router DHCP server to give them static IP addresses, but I have no DNS. When I was ready to setup kubernetes I ran sudo ...
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46 views

Again enabled SELINUX and now the user logins wont work in enforcing mode

I enabled the SELINUX again on my CentOS 8.2 installation. And now the logins wont work, neither by ssh or direct. To login i have to make the mode to permissive. the secure log shows as below. #login ...
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1answer
40 views

Powerdns GeoIP Unable to load module '/usr/lib64/pdns/libgeoipbackend.so':

I am trying to activate geoip module on powerdns I am getting strange error message. GeoIP db installed Package GeoIP-1.6.12-7.el8.x86_64 is already installed. Centos 8 nginx /etc/pdns/pdns.conf ...
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1answer
78 views

Systemd socket activation for multiple ports on Apache

On an Apache Server (2.4.37) running on CentOS 8, there should be a redirection of HTTP traffic on port 8765 to the default https port. Therefore, I am trying to make the server listen to port 8765 in ...
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2answers
29 views

Unable to set outgoing IP on multi-IP CentOS 8

Our CentOS 8 server at Hetzner has a primary IP aquired through DHCP, and an additional /29 subnet. No matter what outgoing IP I choose, packets are always sent with the primary IP. I would like to ...
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32 views

SSH connection issue

I have suddenly started receiving this message in /var/log/secure when a CentOS 7 server connects to CentOS 8 server : session_exec_req: parse packet: Connection from user root centos-7-ip port xxxxx: ...
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2answers
27 views

Adding multiple IPs on same physical interface - but with different logical interfaces (CentOS 8 + NetworkManager)

I'm adding a secondary IP to my CentOS 8 server running NetworkManager. I would previously have done this with ifcfg-style configuration files, but I'm trying to embrace the future and the direction ...
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1answer
47 views

nftables reject resulting in a drop verdict instead

I have nftables setup to reject packets that don't match my allow block (nft list ruleset added below), but the packets are being dropped instead. For context, I have a service that listens on port ...
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48 views

SystemD per unit LogRateLimitIntervalSec not working?

SystemD journal limits logged messages according to RateLimitIntervalSec and RateLimitBurst global configuration options. There is a possibility to change those values per specific unit/service using ...
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1answer
87 views

Unable to log in to FreeIPA web ui - “Login failed due to an unknown reason.”

I have few months old freeipa installation. However, lately when I came back to continue my administration with IPA server I cannot login to it. DNS is working in my private network without problem ...
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29 views

My website address redirects to '/mail' automatically after mail server installation

I followed this instruction to setup a mail server on my VPS: https://www.linuxbabe.com/mail-server/centos-8-iredmail-email-server After installation completed successfully, when I try my website ...
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2answers
73 views

Why my domain doesn't map to the server address?

I have installed DNS server and network manager on my remote server as by following this instruction: https://www.linuxtechi.com/setup-bind-server-centos-8-rhel-8/ as below: var/named/fwd.sssss.com.db:...
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36 views

Where and how can I get the list of the failed login and sudoers in CentOS v8?

People, For CentOS v8 Linux, where and how can I get the event logs for the: Failed SSH (port TCP/22) connection Failed sudoers Thank you in advance.
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34 views

“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.
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43 views

daemontools svscan cannot start supervise due to permission denied error on CentOS 8

I have installed daemontools-0.76 on a CentOS 8 system as per the official docs here: http://cr.yp.to/daemontools.html. I then created a test service symlinked in /service/test with a simple run file ...
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1answer
50 views

how do I change realm login format in sssd?

I'm trying to figure out how to change my realm login format to allow for lowercase but currently it just seems to work with uppercase? realm list domain type: kerberos realm-name: domain domain-...
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1answer
56 views

adminer centos8 gibe me 403 forbidden with SElinux disabled

On CentOS i Install adminer to /usr/share/adminer in /etc/httpd/conf.d/adminer.conf Alias /adminer "/usr/share/adminer" <Directory "/usr/share/adminer"> AllowOverride All ...
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1answer
73 views

revive an old QLogic IBA7322 Infiniband card on CentOS8.2

I have a few HP Blades Gen7 equipped with QLogic Infiniband cards IBA7322 which I would like to use with CentOS 8. The problem I have is that I cannot find the right drivers for them. All the ...
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1answer
19 views

MySQL Connecting with Blank User Name & Password

I'm having serious trouble for the last few days, please have empathy with my question. After a series of server crashes and hackings, today I've found out that my mysql can be connected via a web ...
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1answer
87 views

Recommended approach for booting from Linux software RAID for redundancy

I am looking for the recommended approach to setting up software RAID (using mdadm) on Centos 8 to provide redundancy. In my setup I have 4 identical disks, but I assume the answer should also be ...
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2answers
195 views

PXE boot Centos 8 fails with “failed initrd-switch-root.service”

I am trying to pxe boot centos 8 as a diskless system however, after the boot fails after loading the kernel and the initrd.img when it tries to hand over control to the root file structure. I get the ...
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1answer
159 views

centos 8 - sssd configuration not fetching shadow contents for ldap user

I have configured sssd on centos 8 and ldap on centos 7. I am able to get details about a testuser using getent passwd and getent group , but while testing it for getent shadow I am not getting any ...