Questions tagged [redhat]

Red Hat is an open source technology solutions provider with offerings including Red Hat Enterprise Linux, open source applications, security and systems management, virtualization, Services Oriented Architecture (SOA) solutions, server and desktop operating systems, Java application software and services, and the JBoss Enterprise Middleware Suite. Please also consider whether or not the more specific RHEL5 or 6 tags might be appropriate as well.

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mteTrigger snmpTrap not getting fired when NTP is down

I'm trying to generate DISMAN EVENT whenever NTP is down by extending snmp. Have written shell script to extend mib. Using NTPv4-MIB https://datatracker.ietf.org/doc/html/rfc5907. In the custom pass-...
Vijay S B's user avatar
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3 answers
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How to copy file from /opt directory in local system to remote system in /opt directory with sudo user

I have redhat machine in this machine having some file under the /opt directory. I want to copy those file in remote machine /opt directory using rsync command. The condition is i'm using admin user ...
Chirag Darji's user avatar
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10 views

Cluster Openshift on AWS with IPI, installation error no such host

I'm trying to deploy an OpenShift cluster on AWS using the IPI installation. I've used a t3.xlarge instance and followed the steps in the following guide https://docs.openshift.com/container-platform/...
Felice Coppola's user avatar
2 votes
0 answers
42 views

STIG'd RedHat 8 kills tmux session upon SSH timeout

I am working on a Red Hat Enterprise Linux (RHEL) 8 machine with the DISA STIG applied via OpenSCAP. The STIG requires that users be automatically dropped into a tmux session, that tmux session locks ...
Andrew Laramore's user avatar
1 vote
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40 views

Hadoop + warnings as slow block-receive from data-node machines

We have Hadoop cluster with 487 data-nodes machines ( each data-node machine include also the Service node-manager ) , all machines are physical machines ( DELL ) , and OS is RHEL 7.9 version. Each ...
King David's user avatar
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37 views

FreeIPA fails to deploy in kubernetes due to dbus error

I'm facing issues with deploying FreeIPA in kubernetes. I'm using provided image based on rocky 9, but this issue also happens on other images (based on fedora, CentOS etc.). Deploying it my local ...
Art's user avatar
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1 answer
46 views

what is the link between SAR memory output and free command?

I now understand a bit more RAM usage in linux OS and I knwo that I can use free -h to have correct knowledge about RAM utilization in my server. but I also have SAR that is working on my server and I ...
iostrym's user avatar
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1 answer
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Creating mount namespace and isolating mount points redhat

Trying to get a grasp of all the namespaces and im following this doc https://www.redhat.com/sysadmin/mount-namespaces, in here everything was fine until i got to the Creating our mount namespace ...
Tahtoh's user avatar
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22 views

Update-alternatives does not update all Java symlinks

I'm getting some strange behavior from update-alternatives on RHEL 7.9 when I have Amazon Correto Java 11 and the normal Java 1.8.0 both installed. When Correto is selected as the default, this is the ...
Juan Jimenez's user avatar
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1 answer
86 views

RHEL + how to know the limit of concurrent connections number per port?

how to know the number of concurrent connections per port on RHEL 7.x machines for instance, let say we connect to port 9080 with XXXX concurrent connections. wget http://server_mngmnt.jupiter.com:...
King David's user avatar
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57 views

YARN resource manager "HTTP request sent, awaiting response..."

we have Hadoop cluster with active/stand by resource manager services the active resource manager is on master1 machine and the stand by resource manager is on master2 machine in our cluster YARN ...
King David's user avatar
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31 views

PostgreSQL + Removing old Host from DB not succeeded

We have HDP cluster with 152 workers machines - worker1.duplex.com .. worker152.duplex.com , While all machines are installed on RHEL 7.9 version We are trying to delete the last host - worker152....
King David's user avatar
1 vote
0 answers
29 views

Support Multiple Service Dependencies in Requires Directive in RedHat 8.9

Thank You for looking into the question. I have a Systemd service lets call it main-application.service which needs service testA.service and testB.service started before start of itself. Following is ...
Pulkit Agarwal's user avatar
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40 views

Create custom SELinux policy with full access

I have a process my_process which should have access to all processes, files, ports, network traffic, etc. This process needs to work with SELinux. How can I configure the appropriate policy? I tried ...
Mark Tah's user avatar
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1 answer
54 views

do I need to monitor zombies process in my redhat 7.9 server?

I have a 7.9 redhat server with around 30 users, 64 cores and 512 Go RAM. I have several zombies process, I don't know exactly what did user to create these but I have the feeling after reading stuff ...
iostrym's user avatar
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2 answers
84 views

Grant sudo based on SELinux

I've recently come across SELinux and sudo. Is it possible to allow users sudo when SELinux is permissive, and block these while allowing others when SELinux is enforced? I've looked at section 3.9. ...
user1098490's user avatar
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1 answer
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how to manage NFS network consumption on redhat 7.9 server ? for instance to know which process/which user use the most the NFS link?

I have a server master that contain tools and home directories for all users. then 3 servers are NFS slave connected to the master. user are connected to the slave and they get their home folder ...
iostrym's user avatar
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1 vote
0 answers
64 views

why apache Kafka documentation not gives the ability to use Kafka over NFS as Netapp

We read the latest apache documentation as https://kafka.apache.org/35/documentation.html And what is interesting is that , documentation not mentioned the option to use storage over NFS As Netapp or ...
King David's user avatar
1 vote
4 answers
227 views

How to monitor RAM consumption on Red Hat 7.9

Red Hat 7.9 server with 512 GB RAM. We often have alerts about swap being full. Swap is often used 99%. Our server admin told us it is normal for linux to have swap used 100%. There is no way to check ...
iostrym's user avatar
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1 vote
0 answers
42 views

Filesystem resource failed, Error=timeout during failover resource on pacemaker cluster

I try to setup NFS Active/passive + DRBD on Pacemaker cluster. When i start cluster for the first time every things is ok but when i shutdown master node, resource move to another node but failed on ...
wass's user avatar
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0 answers
47 views

Unable to login with domain users through xrdp in RHEL 9

I have setup Xrdp in RHEL workstation for remote login from windows machine through mstsc. And I have joined the RHEL workstation to Active directory server. I am to login to local users create in ...
Pradeep M's user avatar
0 votes
1 answer
22 views

How to send rotated logs to rsyslog server?

I want to send all the rotated logs from client to my rsyslog server. I already tried using the modfile, but it sends the running logs not the rotated logs (gunzip).
Jessica Martinez's user avatar
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1 answer
53 views

vmstat + on RHEL machine high values of swpd

The swpd field indicates how much swap space has been used; this value increases when the systems physical memory is full and the Linux kernel starts to use the swap partition/file. When the systems ...
King David's user avatar
1 vote
1 answer
418 views

RHEL + how to prevent OS disk - sda to change after reboot

We installed RHEL 7.9 version on physical machine., when sda device was the OS. The machine has the following disks. sda - OS disk sdb - data disk sdc - data disk After reboot OS disk device changed ...
King David's user avatar
0 votes
1 answer
79 views

Login prompt reports 4 failed login but the log shows only 1 entry

I just logged into my small homeserver and I saw this message: Last failed login: Sun Jan 14 17:08:42 CET 2024 from 192.168.1.111 on ssh:notty There were 4 failed login attempts since the last ...
matteo-g's user avatar
  • 103
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0 answers
92 views

System boots with error in systemd-modules-load.service

During the boot of my homeserver (RHEL9), I noticed an error message regarding systemd and some kernel module. I checked the following: [root@homeserver ~]# systemctl status systemd-modules-load....
matteo-g's user avatar
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0 answers
100 views

Is it possible to limit the size of a CIFS/SMB share when mounted?

I have one big 5 TB (and growing) CIFS/SMB share stored on HDD (RAID) on one centralized server for main storage (and backup) and plan to use several additional Linux servers (as proxies) where I ...
kataba's user avatar
  • 1
0 votes
1 answer
183 views

What is the correct KVM VM vCPU config in cockpit for proper load balance on physical CPUs

I have dual CPU server. I want to run some VMs on top of it. While configuring VMs thru cockpit (on redhat 8.0). I cam across this screen: I just want to allocate 8 cores with 4 on each physical CPU. ...
rajeev's user avatar
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1 vote
2 answers
397 views

Problems deploying Ansible playbook to Linux server using python3.8 - selinux python module does not assign correct contexts

I run an Alma 8/9 estate and use Ansible to deploy various config changes, and I've run into an unusual problem on one of my client boxes. Alma 8 by standard comes with python 3.6, which works quite ...
motorleague's user avatar
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0 answers
224 views

LUKS full disk encryption with decryption key on USB drive

I have alma9 setup with luks full disk encryption. I want to put a decryption key on a usb drive to boot up without a password. Picking through the various tutorials (mostly for debian), I have this: #...
dan's user avatar
  • 333
-1 votes
1 answer
418 views

High Load Average but Low CPU Usage

I'm trying to find the cause of the high load average on our server running in RHEL 8. The top command shows that our load average for 1, 5, and 15 is more than 250+. Also, server is responsive at the ...
IamBayMax's user avatar
1 vote
0 answers
185 views

The Site cannot be reached - Docker - Gunicorn

I have have a Docker container running on Linux Machine. When I tried to access it on Browser it says This site can’t be reached 10.xxx.xx.xx took too long to respond. Try: Checking the connection ...
Usman Rafiq's user avatar
2 votes
0 answers
229 views

How to sucessfully import an .ova vm exported from ovirt/kvm (Red Hat OS)?

So, I was given an .ova file. This is exported from a server using a combination of KVM/QEMU and ovirt technologie - the server runs RedHat and I want to import this .ova file into vmware or ...
oolnux's user avatar
  • 21
1 vote
1 answer
500 views

What to set $DISPLAY environment variable to when su to another user

I'm not that au fait with Linux, let alone things like X and display/window managers. I am trying to run the GUI installer for Oracle Enterprise Manager, but it is complaining about the value for the ...
James Edmonds's user avatar
0 votes
1 answer
411 views

AH02565: Certificate and private key from <cert> and <private key> do not match

I'm trying to update some expired SSL certificates internally on some Ubuntu and Redhat servers. I have an internal certificate authority for this (ADCS). These are the steps I'm taking: Generate CSR ...
poppopretn's user avatar
0 votes
0 answers
91 views

Multiuser SMB Mount on Red Hat: Users Seeing Each Other's Folders Despite Separate cifscreds

We are attempting to mount a Windows file system on a Red Hat 9 machine. This Windows file system contains hundreds of accounts with finely tuned access rights. We are trying to implement the ...
Vincent Guyader's user avatar
0 votes
0 answers
91 views

ansible-galaxy install not working on RedHat 9

I am currently trying to install the community.general collection for ansible, which is fairly straight forward as I did it on countless systems including RedHat 8. But to my surprise, I tried install ...
omarelkady22's user avatar
0 votes
0 answers
30 views

Configure a server to act as an internet gateway [duplicate]

I have two virtual servers hosted in Hetzner Cloud. The first server (let's call it Access Server) has a Public IP assigned and has internet access. The second server does not has a public IP assigned ...
Arnold Zahrneinder's user avatar
1 vote
0 answers
870 views

Qualys: Weak SSL/TLS Key Exchange

In a Qualys vulnerability report on a RHEL 8.6 server where a CA endevor bridge for git is installed, it detects the following vulnerability: QID 38863 - Weak SSL/TLS Key Exchange Offering as a ...
cekodis681 cekodis681's user avatar
0 votes
0 answers
51 views

What is the equivalent of /etc/apache2/envvars in EL-based systems?

In Debian-based systems, it's possible to source a bash script in /etc/apache2/envvars to dynamically set an environment variable. Here is an example: Create a file (/etc/profile.d/myenv.sh) with the ...
H M's user avatar
  • 1
0 votes
1 answer
174 views

sed + delete all comment lines and when line match specific word

I created this sed in order to delete the comment lines lines from fstab ( comment can ne with begin of space or TAB etc ) sed '/^[[:blank:]]*#/d' /etc/fstab in my case I want to add also the ...
King David's user avatar
0 votes
1 answer
290 views

http_code 0 with Redhat php curl request

I can use lynx to access a website from the server fine. When I try to access the same website with a php curl instruction I get http_code=>0 from curl_getinfo($ch); The same php code on another ...
CSchwarz's user avatar
  • 101
0 votes
1 answer
261 views

Oracle Linux 8 to 9 in place upgrade with Leapp fails with XFS internal log size 8192 too large, must be less than 4789

Can someone please help? 2023-11-14 09:25:01.774 DEBUG PID: 308200 leapp.workflow.InterimPreparation.dnf_dry_run: External command has finished: ['/bin/dd', 'if=/dev/zero', 'of=/var/lib/leapp/...
Kerry KRAMMERSANDSTRUM's user avatar
0 votes
1 answer
175 views

NGINX reverse proxy not working as expected

I'm trying to deploy an app through docker containers and reverse proxy it to my destination endpoint. My docker compose file looks like this: version: '3.4' services: monitor.api: image: ${...
maaajo's user avatar
  • 101
0 votes
0 answers
33 views

Resetting logical Direct-Access Error || RHEL 7.x

We have an error for the LVM resetting device which has been impacting our Linux server during this period. kernel: hpsa 0000:02:00.0: scsi 0:1:0:1: resetting logical Direct-Access HP ...
Moustafa's user avatar
1 vote
1 answer
120 views

ProFTPd : SFTP "get" command is denied (when "put" works ok)

I have this issue on RHEL 8.6 with proftpd 1.3.8a I have a proftpd server setup, with a user called IFTPTEST. In its home, this user has 2 directories, in/ and out/. My goal is : I put files in the ...
Matt's user avatar
  • 21
0 votes
0 answers
116 views

Forward SNMPTRAP to specific community doesn't work

CONTEXT Forward SNMP trap received by snmptrapd service to specific Community. You can see my lab scheme : MyLabScheme VERSIONS USED Servers : RHEL 8.7 SNMP : NET-SNMP version 5.8 SNMP Version : 2c ...
user20893268's user avatar
0 votes
0 answers
205 views

How can I give permissions to linux user to execute chown and chmod commands for specific directory?

I have a linux server RHEL 8. This server has a linux user called 'john'. This user doesn't have permissions to apply sudo as root. I wish to give to john user permissions to execute chmod and chown ...
user3637971's user avatar
0 votes
0 answers
434 views

NetworkManager not starting and dbus not working correctly after reboot - AlmaLinux9 (RHEL)

I have a Server with AlmaLinux9 installed which worked perfectly and i rebooted the server often and nothing happend. But recently i rebooted the server and now it get's no internet connection anymore....
Jonathan's user avatar
0 votes
0 answers
74 views

HDFS + Taking long time to copy files from hdfs to local folder

we have Hadoop cluster that used HDFS filesystem the problem is about copying file from HDFS to local folder that take huge time for example usually copy file with size of 3G takes few second , but ...
King David's user avatar

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