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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Linux distribution for PostgreSQL and Python - production-level [closed]

What Linux distribution is good for a production-level server where I can maintain my PostgreSQL database and also do Python work with large files? I have read that Red Hat based systems are ideal for ...
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Rocky Linux 8.6: conflicting packages when upgrading?

After deploying a Rocky Linux VM which is intended to run as a web server I did an update and got these messages: [root@rocky ~]# dnf upgrade --refresh -y Rocky Linux 8 - AppStream ...
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git remote update not working

RHEL Server 8 logged in as user with root access. I have a private mirror of a public repo that is on github. The private mirror is being used as a git server repo locally. I'm trying to update the ...
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RAID + how to manipulate the disk size with RAID controller

We have 3 Hadoop HDFS servers on DELL HW physical machines , when all servers are with RHEL 7.2 version Each server include 3 HDFS disks when each disk is 1TB Now we want to do add another 3 Hadoop ...
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RHEL + can we improve disks performance by tuning kernel parameters?

we have Hadoop cluster and we are collection metrics collection data in order to investigate slowness behavior on spark applications after long investigation on our Hadoop cluster we noticed from ...
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"Auto resize VM with windows" greyed out since Graphics type 'vnc' does not support auto resize in Redhat

As per redhat spice is deprecated since RHEL 8.3 ( https://access.redhat.com/solutions/5414901 ) so i cannot use spice.It gives me errors when i try to use spice instead of vnc Host : Red Hat ...
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How to use "mount_smbfs" on NetBSD to connect to a samba file server on a non-root Samba server

I have a RHEL 8.6 machine, and I'm setting up a samba file server using port 1445 so I can start the server as a non-root user. The server is working locally, as I can run smbclient -p 1445 //...
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Vim Ex Command History Ctrl-F not working

I used to use Ctrl-F in my personal laptop to successfully get the command history pop-up in ex-mode but in my work PC, that no longer works. It just shows as ^F if I type Ctrl-F. Vim Version is 7.4....
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fdisk -l + why fdisk show diff size from real disk size [duplicate]

fdisk -l show the following os disk size fdisk -l Disk /dev/sda: 247.0 GB, 246960619520 bytes, 482344960 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / ...
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linux + how to capture the exception before running any systemctl command

Some times we get the following expiation when using systemctl restart XXXX.service ( XXXX – is the service name ) Error getting authority: Error initializing authority: Could not connect: Resource ...
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LINUX + find the root cause for exception - failed to create bus connection: Resource temporarily unavailable

here is a strange exception for timedatectl command , on our RHEL server version 7.6 timedatectl set-timezone UTC Failed to create bus connection: Resource temporarily unavailable based on that ...
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how to test ntp servers as real servers that responding without using ping test

we have bash script that configured the chrony.conf script check if ping is ok on ntp1 and ntp2 ( ntp servers ) and then script insert the ntp servers to /etc/chrony.conf ( only if ping success ) ...
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Where did the /boot/grub2/grub.cfg `linux16` lines go CentOS 8 / Oracle Linux 8 / RHEL8?

In el7 there were lines in grub.cfg like linux16 /vmlinuz to load a kernel and create menu items. In el8, those menu items are not listed in grub.cfg after a grub2-mkconfig -o /boot/grub2/grub.cfg. I ...
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yum update got error 404 with an URL on https://cdn.redhat.com/

I am trying to install Snap Store and Octave on RHEL7 following the official instruction. However, the command yum update got stuck on an error saying, https://cdn.redhat.com/content/e4s/rhel/server/7/...
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Network address setup in VirtualBox when moving between a work environment with a “192.168.x.x” range and home where I use a “192.168.1.x” range?

At work we use RedHat Enterprise Linux 8. At work, the network is set to use 192.168.x.x addresses. And so our VirtualBox VM images are set to use this range of addresses. I brought my laptop at home ...
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how to identify DIMM card conflicts from kernel messages

we have RHEL 7 server , and from dmesg log we can see the following details [13901018.980859] {9}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 4 [13901018.980868] {9}[...
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Error while changing password

I'm using Red Hat Enterprise Linux 8 normally, but I don't know why after I logout and login back to my daily use user (someone), it said that authentication doesn't work. I logged in the root account ...
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kernel parameter - net.core.netdev_max_backlog , what happened when its too low

we want to understand what are the aspects when net.core.netdev_max_backlog kernel value is very low and not as recommended on our Linux RHEL machines , the value for this parameter is 1000 since our ...
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Linux terminal takes 5 minutes before allowing me to use it

When I launch a terminal on my workstation that is linux based, takes 5 minutes before allowing me to run commands. It looks it struggles to mount /net/fileserver. Does anyone have a way to reduce or ...
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Integrating active Directory with Rhel IdM

Has anyone managed to integrate Active directory and Rhel IdM? I read that idm uses active synchronization to integrate user data stored in an Active Directory domain and the user data stored in the ...
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RE: host pip server on cloud

we are moving from on premises to a cloud. we currently host some of our custom build python packages on on premises pip server. but as we move to cloud we would like to have these custom pip packages ...
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Yum update Could not contact any CDS load balancers Amazon EC2

In my scenario , for some reason yum has stopped working in my Amazon EC2 instance, located in the us east -1 region. There seems to be something wrong with the path of the repo metadata, is this ...
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Encrypt SVN to store passwords

could anyone advise how to encrypt SVN (amazon Linux 2) , Plan to encrypt or disable the SVN from asking if unencrypted passwords should be stored? We never want a user to be able to do that. Is there ...
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Httpd Directory read permissions issue

In my scenario ,I need the 'httpd' directory in '/var/log/' to be readable by the users in 'devs' group (Amazon Linux 2) Could anyone guide me how to accomplish this? We have a few developers who ...
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How to Access GNOME 3 Overview Mode?

As the title states I'm looking for ways via the keyboard to open (and eventually disable) the overview mode for GNOME 3. As it stands now I know of: Super Alt + F1 I know I can disable these keys via ...
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is it possible to lock rpm from any installing

we want to exclude rpm for any installing as reference in yum its should be like this vi /etc/yum.conf exclude=* in example above we avoid any yum installation about rpm , we need the same approach ...
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RHEL 8 and import MySQLdb

I have a .py-file saying import MySQLdb. pip3 install MySQL-python says ModuleNotFoundError: No module named 'ConfigParser' even when pip3 install ConfigParser says "Requirement already satisfied:...
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Rsyslog logs readable by all users

I have an rsyslog instance in a RHEL8 linux server that is used to collect logs from other systems. That works fine, and it stores all the logs in the /var/log directory with following format /var/log/...
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Do writes and reads contend with each other for an SSD? [closed]

I have a disk I/O intensive application where I am reading and writing a lot concurrently. For a spinning disk, it makes sense that there is contention because the pointer has to move around a lot but ...
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Is it possible to remove dnf from minimal RHEL 8 server images

We have RHEL8 servers that load their base software into a RAM based file system and use most software from a networked directory (which is structured analogously to what people usually put in /opt). ...
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Permission denied issue with fuse mount: "setting times of <FILE NAME>: Permission denied"

I have a Google cloud bucket being mounted on a RHEL8/FIPs GCP VM (gov't contract :(). It is a permanent mount point with this configuration in /etc/fstab: <BUCKET_NAME> /usr/local/folder ...
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Far Manager NetBox SFTP can't connect to the linux server

I'm trying to connect to the RedHat Linux server through Far Manager 3.0.5800.0 x64 and NetBox plugin with SFTP. But it doesn't open the session as I expect it and doesn't exposure any errors. The ...
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KVM 3.1.1 installation

I have a requirement to install KVM 3.1.1 on RHEL7 or 8. When I am checking I found that qemu-kvm is automatically installed on RHEL8 and the version is 4.2. It would be great if anyone can share the ...
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SSH client works only when cipher is specified

When I try to connect to remote host using command ssh -vv hostname, it hangs for a while, then closes connection. I can connect though if I specify following command: ssh -c aes128-ctr hostname The ...
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Yum won't install specific version of dependency, even though it's available

Why is there confusion during a yum install when my package requires an exact version of another package, which is available, but there is also a newer package available? Error: Package: my-nginx-...
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RHEL / CentOS restrict SSH access for certain Windows AD groups

I am trying to restrict SSH users belonging to a Windows AD group through access.conf present in /etc/security. I am facing issue where my AD group name is having spaces, round brackets Eg : Test ...
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AWS Linux Stuck due to screen command - blank screen - how to get out

I am using AWS Linux (Amazon Linux 2 AMI) and I am totally stuck after using the basic "screen" command. I was following an installation guide and one of the steps was to use just the ...
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1 vote
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How can I have my service be the first service to begin stopping on system reboot/shutdown?

I am trying to have a custom service shutdown an application on reboot, I can get the service file to work correctly up to a point, that point being that the my custom service needs to be brought down ...
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Rocky Linux 8 SSH Sessions Timing Out

I am connecting via SSH from PuTTY running on Windows 10 to an OpenSSH server on Rocky Linux 8. I am using the Bash shell. These sessions close after a period of inactivity. I have not measured the ...
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How to disable usage of Function keys in Redhat linux 6

I am trying to disable to usage of Function keys F1 to F12 in Redhat linux 6 so that combination of "Ctrl + Alt + F1 to F12” remains ineffective. PS: Redhat linux version is 6 which does not ...
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telnet: connect to address 92.205.28.224: Connection refused

I need telnet 92.205.28.224 587 to not get connection refused I see telnet is an active service and port 587 is active on firewall. I also see 587 is open in the picture below. services: dhcp dhcpv6-...
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How to check "stripsize" of a stripped logical volume?

I have created a stripped logical volume using below command: lvcreate -L 1G -n lv1 -i 2 -I 128 myvg1 /dev/nvme0n1p5 /dev/nvme0n2p6 Now, how can I check the stripsize again? I have tried using ...
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In a Linux machine (RHEL): How to get information of a killed process?

I need to have more details of a process that was already killed. I have only the process name and I want to find out all the other information such as: PID, Start date, End date, etc Could you please ...
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Ports required for Apache Spark standalone cluster (1 node) on CentOS 8

I want to install Apache Spark (v 3.1.2) standalone cluster on CentOS 8. What ports should I allow in my firewall?
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Cannot update PHP 5.4.16 to PHP 7.3

I am using RedHat Linux 7.9. I am trying to upgrade PHP 5.4.16 to PHP 7.3 commands I find in blog posts and questions, don't work for me. For instance: [root@username src]# php --version PHP 5.4.16 (...
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Cannot start Apache with public ip address

I am trying to start the apache server and it works with localhost and port 80. When I change the localhost to the public IP address and run sudo systemctl start httpd I am geting: Job for httpd....
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How to keep group ownership when copying files with file explorer

I have sensitive files/directories in let's say, t:\supersecret. Files must retain their restricted group ownership even if they get copied to t:\public1 (open permissions area) by mistake. Windows ...
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noexec, nosuid, nodev etc not available for xfs_qouta. Is it required?

we would like to implement the CIS hardening profile for RedHat. (https://www.cisecurity.org/benchmark/red_hat_linux/) The first rules are all about mount settings like separate mounts for /tmp, /var,...
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RHEL Routing Configuration

I have an RHEL server with two interfaces: one on 10.x and one on 172.x I have docker running on 172.x I am trying to run an asset discovery from a 3rd party tool (Source: 10.65.48.6) to my host on ...
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Cannot get IP on cloned VM LINUX7,8

I have cloned a virtual machine running RHEL 7 and 8. I am not getting an ip address After cloning the virtual machine, networking no longer functions. The ifconfig command does not show the network ...
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