Questions tagged [centos8]

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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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41 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
37 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
26 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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38 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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17 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
40 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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1answer
30 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
52 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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32 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
35 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
44 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
26 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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22 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
20 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
31 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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24 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
50 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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27 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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29 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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39 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
32 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
54 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
68 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
53 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
144 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
109 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 ...
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14 views

Firewalld and Rich rules

After some general good practice w/firewalld, as I have a set up which feels like it might a bit of a kludge. Public zone - has interface assigned, set to 'drop'. Internal zone - initially set up one ...
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26 views

Centos 8 Kickstart installation ignoring custom partioning

I am installing Centos 8 on a hard drive that already has a Centos 7 installation. I created a kickstart file by performing the installation manually. When I try to use the kickstart file it fails ...
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214 views

Centos 8.2 KVM Windows Server 2019 Blue Screen

EDIT 11.07.2020 I prepared a custom vhd via virtualbox. It has the same bluescreen, but now I'm getting into cmd. mdsched worked fine -> So no memory issue... Informations: HP Proliant 380 G9 ...
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30 views

CentOS 8 - How can I set a client to use a dns server for all domains and one dns for a particular domain?

I'm currently struggle to configure Linux (CentOS 8) in a special way. The goal should be that my client asks ALWAYS a public DNS Server for everything that is not "example.local". "...
1
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1answer
44 views

Debian-based servers can authenticate users on OpenLDAP when RH-based servers cannot [closed]

I'm putting centralized authentication in my LAN infrastructure. The LDAP server is up and running, and all Debian/Ubuntu servers manage to authenticate users against the LDAP. Now, all my CentOS8/...
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83 views

samba server mount points stopped working on CentOS 8 install, error: Failed to start SPNEGO handler for negprot OID list

After about 6 months of smb working flawlessly on a home server, it is now failing to allow remote systems to mount with the following error message in /var/log/messages: Jun 27 12:53:10 bike3 smbd[...
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107 views

CentOS 8 KVM under CentOS 7 — Kickstart Network Install Fails

We have CentOS 8 KVM running under CentOS 7. Everything seems to be working well for us once the KVM is up and running. We are using kickstart to bootstrap the KVM. We are having problems ...
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113 views

Centos 8 / EL8 AppStream profiles to offline machine

Im trying to install freeipa-client on a centos8 machine. The machine is offline (no internet connection possible) with a local network mirror. The mirror has been constructed via an rsync of the ...
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1answer
35 views

Run incoming mail through PHP script - Postfix

I have followed this answer Pipe all Postfix email for a domain to PHP script - Centos7/EC2 to direct incoming mail for a specific address to a PHP script. My aliases file entry looks like: mail-...
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1answer
139 views

CentOS 8 remote logging logs on both custom log and /var/log/messages

I'm trying to configure a remote log host for my servers (all CentOS 8). I added this on my central server if $fromhost-ip == '123.123.123.123' then /var/log/{{hostname}}.log Also I changed my client ...
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2answers
184 views

How much does httpd_can_network_connect being set to 1 actually open up on SELinux

I am getting the following SELinux denied lines in my log file when I attempt to redirect a user to Paypal to checkout. Would you please help me understand what it means and what exceptions I should ...
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38 views

Unable to run sidekiq as service in CentOS 8

I have following service file. [Unit] Description=xxx_sidekiq After=syslog.target network.target [Service] Type=notify WatchdogSec=10 WorkingDirectory=/home/xxx/project/matchspace/appointment-ms ...
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174 views

Adding default gateway using nmcli - Centos 8

I am trying to add 2 default gateways on my Centos8 server with different interface names and metrics. I have a route file for each interface with the route "default via metric ". This is not working ...
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1answer
45 views

Inverse Name Search by UID (CentOS 8) - Retrieves last created with same UID

I am working with CentOS 8 and I have a problem with UIDs and User Names. I have installed VestaCP to manage my websites. The user by the name of "user123" and UID 1007 is the owner of all the ...
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18 views

Rsyslog - debugg error logs

I run rsyslog in the debugg mode (-dn) and I show this logs : 0153.213242514:main thread : nsd_ptcp.c: We could initialize 1 TCP listen sockets out of 2 we received - this may or may not be an ...
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16 views

Rsyslog queueing: configuration failed

I want to use queueing/disk buffer with rsyslog (8.37.0) for each rsyslog config. I've configure this rules : template(name="test_template" type="string" string="/data/%FROMHOST-IP%.log") ruleset(...
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293 views

rp-pppoe is missing on centos 8

I cannot find the rp-pppoe package through yum or dnf on centos8, though it works well on centos7 and centos6. I found following thread: https://forums.centos.org/viewtopic.php?f=56&t=72256&p=...
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58 views

GCP startup-scripts errors

I try to create an compute instance with gcloud util from cli and have some troubles. There is my creation command: gcloud compute instances create bastion \ --boot-disk-size=20GB \ --image-...
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2answers
456 views

Centos 8.1 installer cannot see SAS disks attached to Perc 6/i

How to get Centos 8.1 installer to see Perc 6/i attached SAS disks? The Dell t7400 hardware boots MS-Windows properly from Perc 6/i attached SAS disks. Dell Bios A11 shows 3 virtual drives at ...