Questions tagged [redhat-enterprise-linux]
Use for questions about Red Hat Enterprise Linux (RHEL), a Linux distribution from Red Hat intended for enterprise use. Note there are version-specific RHEL tags for questions unique to a specific version. Use a product-specific tag for questions about other distros in the Red Hat family, like Fedora or CentOS.
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Samba mounts hangs the system
I set up a cluster using pcs with 2 nodes + quorum
[root@konor2 etc]# pcs status
Cluster name: wildflycluster
Status of pacemakerd: 'Pacemaker is running' (last updated 2023-06-01 09:52:35 +02:00)
...
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I have to upgrade postfix and devocot with os RHEL 8.6
I have existing set up for postfix 3.6 & devocot 2.3 with RHEL 8.6 os. We need to upgrade it with postfix 3.8 and devocot latest version via source code
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25
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RHEL + how comes EFI boot partition created when we install RHEL 7.9 version from scratch
We are using servers as DELL R630 in our lab's, when OS version is RHEL 7.9.
Here is an example from filesystem on these servers (from boot point of view):
NAME MAJ:MIN RM SIZE RO TYPE ...
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How do I install pgaudit on PostgreSQL 11.5 in Red Hat Linux environment?
PostgreSQL 11.5 was installed with Control-M in a Red Hat Linux environment. Unfortunately, there are only 2 extensions (dblink, plpgsql) that were a part of that installation.
I am new to PostgreSQL. ...
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22
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How do I install `libcurl` on centos stream 9 (or rocky 9)?
I get the following error trying to install libcurl on a fresh CentOS stream 9 container:
$ docker run -it quay.io/centos/centos:stream9 /bin/bash
[root@72285314347a /]# yum install libcurl
CentOS ...
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1
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1
answer
19
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Command `yum history package-list` not finding expected matches
On a server of Red Hat 7.9 (Maipo), we got an estimate that we removed the DSMC application from about five months ago. As a due diligence, we need to find more details including exactly when and who.
...
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2
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633
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How can I correctly check on what network interface SSH is listening on a Linux machine?
I am not a system engineer or a network expert (I am more a software developer) and I have the following problem that I have to solve.
I am working on an Oracle Linux machine (basically it should be ...
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25
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RHEL + how to capture fresh kernel message without machine reboot
here is example from dmesg output from important production server ( RHEL 7.2 - DELL machine HW )
as we can see the sde disk in server is dying
[Wed Jun 30 11:24:58 2021] sd 0:2:4:0: [sde] tag#0 ...
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RHEL 7.9 : Control the tables order of the iptables-save output command
I'm facing an issue where I have to control the output of iptables-save.
It look like the table's order (*filter, *nat) output is kinda random.
For exemple here we have filter table in first, but we ...
1
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1
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RHEL 7.9 cannot register with subscription-manager
We have been using Red Hat free developer subscription for years, and everything is so far, so good.
However, the testing virtual machine popped an error saying the OS is missing updates because there ...
- 249
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38
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vim colorscheme issue on redhat
I have set my colorscheme to desert in my redhat 6 .vimrc. In redhat 6, when I open vi any file, it is displayed using the colorscheme.
There is a redhat 8 machine that I can ssh to and when I do, my ...
- 101
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rhel + disk util is very high , what is the impact for long term
we have backup server with rhel version 7.2
server is VM machine , and OS disk is VMDK disk
disk used space is around - 50% , and from smartctl we not see problem
as we can see from follwing details
...
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102
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PAM updates for mounting an encrypted user's home at login (GNOME 40.4.0)
I would like to decrypt my LUKS encrypted /home directory at login on Rocky Linux 9.1. I have been trying to adapt this Arch Linux guide (https://wiki.archlinux.org/title/Dm-crypt/Mounting_at_login; ...
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50
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RHEL server + what is the meaning of the kernel messages about Hung TX queue XX
We have 524 RHEL machines. in our Hadoop cluster ( all machines are DELL HW )
all machines are RHEL 7.2 version (old kernel version)
uname -r
3.10.0-327.el7.x86_64
last week we seen the following ...
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1
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linux + how to convert disk DEV name to humane reading
we get from site remote machine the files under /var/log/sa/*
and we copy all them on our local machine under /var/tmp/sa/*
so when we run sar -f /var/tmp/sa/sa14 -d on our local machine
we get the ...
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26
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Restarting Apache after installing RSA Web Agent
Good afternoon,
We are currently attempting to install the RSA Web agent on our Apache web server, but run into problems after installation, when restarting the web server.
The error we get is the ...
- 33
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3
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73
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Using read -r within in-line shell scripting
I have a file that contains a list of absolute paths of several files. I need to move all of the files listed in the file to another directory. Unfortunately, I have to do this using in-line shell ...
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0
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25
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Azure Data Studio won't open on Red Hat Enterprise Linux 9
I am attempting to use Azure Data Studio on a Red Hat Enterprise Linux 9 server. I followed Microsoft's instructions for installing it. The install succeeded; however, when I try to use the ...
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129
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How to log just comands typed by user using Auditd and ignore system calls?
Using Auditd, I performed the following configuration:
# /etc/audit/rules.d/audit.rules
[...]
-a always,exit -F arch=b64 -S execve
-a always,exit -F arch=b32 -S execve
It works, however ends up ...
Claudio Castro
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Linux server rebooted without any traces ? How to find RCA for it
The server is rebooted and there are no logs in /var/log/messages and last -f for the reboot.
Power and hardware issues are considered the primary stage. All system admin level and Redhat things have ...
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1
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249
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Windows 11 and Red Hat Enterprise Linux 9 dual boot not working with GRUB
I have problems with RHEL 9 and Windows 11 in GRUB.
I added menuentry "Windows 11" {set root=(sda1) chainloader +1} to /etc/grub.d/40_custom and then executed the command grub2-mkconfig --...
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0
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104
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RHEL 8 Consistent Network Interface Naming not Working for Add-In PCIe Network Adapter
I am using RHEL 8.0 on a machine with four 1 GbE network interfaces and two 10 GbE network interfaces. The 10 GbE network interfaces are provided via a PCIe add-in card.
I am seeing that the two 10 ...
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1
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0
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91
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Unexpected boot menu option on RHEL 9
I have 2 SSDs on my laptop both 512gb. I have windows on one of them and today I installed RHEL for learning purpose on the other. I expected 2 options on my boot menu - one for windows and other for ...
1
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0
answers
51
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Partition keeps getting corrupted. How to prevent or boot anyway?
I am running RHEL7, and my audit log partition randomly (not often, but often enough to annoy me) gets corrupted, preventing me from booting. How can I either prevent the partition from being ...
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0
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53
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How to install kernel 4.8 in RHEL?
I am using RHEL vm provided by aws. I want to downgrade kernel 4.8 to for research purposes. Is there any way to do that? The result of uname -r is
5.14.0-162.12.1.el9_1.x86_64
i tried converting to ...
- 111
2
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0
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26
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firewalld Zone "trusted" Drops about 15% of Frames that are Passed by Zone "public"
Background
I have two lab machines, which I'll refer to as A and B, running RHEL 8.0.
I SSH into A and B from my Windows desktop over a 1 GbE link, whose network interface I'll refer to as eth0.
A and ...
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1
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91
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REDHAT machine + rsyslogd eating up 10+ GB
we notice about this problem recently
we found that rsyslog service is eating memory and some times its up to 10G
we have different kind of redhat machines as version 7.6 and 7.9
is it possible to ...
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How to downgrade or upgrade AuditD on redhat 8
OS version = Red Hat Enterprise Linux release 8.6 (Ootpa)
Kernel version = 4.18.0-425.3.1.el8.x86_64
I can't find a way to upgrade/downgrade auditd or auditctl.
I must change the version of the auditd/...
1
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1
answer
188
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Logic operators in AllowGroups in sshd_config
Is it possible to use logical operators in AllowGroups in sshd_config? The thing I want to achieve is to permit user to access server only when it belongs to two groups. ChatGPT gave me this answer, ...
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0
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100
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RHEL 8.7 Server Unable to "su root" Consistently
This particular server was set up with the "French National Agency for the Security of Information Systems (ANSSI) BP-028 Enhanced Level" security profile that is packaged with RHEL. After ...
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1
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Podman error "no space left on device" even though there is space and tmpdir is set
I have a 150GB /docker partition mounted on a RHEL 8 VM and I have ran this command as root and also with a local user that has sudo:
export TMPDIR=/docker
to make Podman change its default tmpdir. ...
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1
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558
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Samba server on Red Hat - "client signing = mandatory" bug
My Samba version is 4.10.16 and I've got a problem with setting client signing variable to mandatory. It is properly set in /etc/samba/smb.conf, but testparm show client signing = required.
My RH ...
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1
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26
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Can't login to Virtual OS [closed]
I have a VirtualBox running on RHEL8 and it has RHEL8 installed.
When I tried to login to the OS, after entering the user id and password it goes black for a second and then comes back to ask for ...
- 255
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0
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289
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UDP Throughput Dramatically Lowered with MTU = 1500
I am using iperf3 version 3.5 under RHEL 8.0 to test a 10 Gbps point-to-point Ethernet connection with UDP. I have the MTU on both the source and destination NICs set to 1500.
I invoke iperf3 as ...
- 971
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54
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Can't detect USB on RHEL9 VMware
I can't detect my USB on RedHat Enterprise 9, I did make sure that the removable disk is connected to VMware and not the host.
I can detect it on Kali Linux btw I even tried to use an external hard ...
- 33
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0
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233
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Increasing PCIe Bandwidth Available to a 10 GbE NIC
I am running Red Hat Enterprise Linux 8.0 (RHEL 8.0) on a Dell 7920 Rack. This machine has 8 GB of RAM. I do not have the option to add more RAM (its hardware configuration is locked down).
This ...
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41
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linux + extend (grow) root file systems without downtime on RHEL production machines
I want to share the following procedure that we did on lab (RHEL 7.2 machine) in order to increase The root file system (XFS filesystem) from 130G to 150G
Details from VM RHEL 7.2 machine are
df -h /
...
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53
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Need to Mirror 2 monitors with different resolution
I am using Linux Red Hat 7.5 and need to mirror two different monitors with different resolution using XRANDR commands.
Monitor 1 DP-0 3340/800x1400/3500+0+0
Monitor 2 DP-1 1920/1600x1080/900+3440+400
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1
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252
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VirtualBox guest additions update got error missing SELinux target policy file
While updating VirtualBox guest additions on a Red Hat Linux 7 (RHEL7) virtual machine, we got the below error about missing a target policy file of SELinux.
We checked the virtual machine:
We tried ...
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28
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Connect to an image of an Amazon EC2 instance without SSH
I have an amazon EC2 instance (redhat 8.6)
I can create an image of that instance using the process described here:
https://docs.aws.amazon.com/vm-import/latest/userguide/vmexport.html ,
with the ...
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1
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1k
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How to upgrade libc version on Red Hat 8?
I am running Red Hat Enterprise 8.2 with a libc version glibc-2.28-189.5.el8_6.x86_64 which has a bug : glibc causes deadlock.
It was fixed on glibc-2.28-206.el8
How do I upgrade only the libc ...
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0
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52
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RedHat 8 - adding vsftpd service possibility to reload
I have a few servers running vsFTPd. Some of them on Ubuntu 20.04, some of them on RedHat 8.
For some reason, the default install of vsFTPd on the RedHat 8 systems does not allow the service to reload,...
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0
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76
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RHEL + how iostat calculate the disk util%
here is example from iostat on my linux RHEL server
iostat -d -x 5 5
Linux 3.10.0-514.26.2.el7.x86_64 (server.rfatam.com) 11/13/2022 _x86_64_ (32 CPU)
Device: rrqm/s wrqm/s ...
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21
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I'm trying to install MariaDB but MySQL gets installed instead
[root@sweet91 playbook]# dnf install mariadb
Updating Subscription Management repositories.
Red Hat Enterprise Linux 9 for x86_64 - 22 kB/s | 2.4 kB 00:00
Red Hat Enterprise Linux 9 for ...
0
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1
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103
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set the permissions on all the files and folders within a directory (CentOS 7.0 )
I kind of new to Linux/Centos world, is there any way to set the permissions on all the files and folders within a directory. I know chmod 777 will set permissions on the directory, but if it already ...
0
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0
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18
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How to ensure a server's source code and binaries are the same as the standard?
I have seen the on-premise equipment having a design to deal with unauthorized modifications, e.g. a client's staff wants to resolve a technical issue by DIY (do it yourself), not willing to call the ...
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1
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1
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1k
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Change tty/pts ssh session between Unix client & server
Hello everybody i ask if is possible switch between /dev/pts/1 and dev/tty/1.
I work in env where the connection is bad.
If loss ssh connection i need to restore ssh's session in the same state that ...
0
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0
answers
17
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How to check which service or application in causing login to Redhat GUI desktop very slow?
On my red-hat desktop, after i enter password it takes too much time to login and sometimes login screen presented again and i have to login again.
Where can i find the problem. Is it systemd services ...
- 973
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0
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93
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issues with static ip for linux running in hyper-v
somehow managed to spend most of my day on this issue. about every guide lead back to this microsoft article that was about setting up a new hyper-v switch with a nat.
New-VMSwitch -SwitchName "...
- 1
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0
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63
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Which Linux rescue disk has out the box serial console support?
We have a RHEL8 machine in a different city that needs to be rescued. The machine is connected to a serial console, and we can successfully access the BIOS and choose a disk to boot from.
Our problem ...
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