Questions tagged [linux]
Linux is the generic term for a UNIX-like open source operating system based on the Linux kernel.
38,956 questions
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Public DNS Record override using BIND9 CNAME [closed]
I have an Ubuntu Server 22.04 running as an AWS EC2 instance. Trying to setup a reverse proxy with Apache2 by setting a CNAME some.example.com (not the real one) to forward the request to api.demo.com ...
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1 vote
1 answer
83 views
mariabackup --prepare keeps backup state at "log-applied", not "full-prepared"
I'm performing a full backup on a MariaDB 10.6.8 instance on linux and encountering an issue where the --prepare step finishes successfully but fails to transition the backup state to full-prepared. ...
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0 votes
0 answers
27 views
Apache htaccess allow TYPO3 and other WEB pages
It's my first time to setup TYPO3 on a LInux (Proxmax/Debian) system. Since Typo3 V3 I used Windows. My target is to use TYPO3 and other WEB content on the same server. Under Windows I had the other ...
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1 vote
1 answer
50 views
facter fails with: Syntax error: word unexpected (expecting ")")
Ich was working with puppet and facter to collect information from the puppet node. Testing the *.rb script however regularly failed with WARN backup_key.rb - Command /opt/puppetlabs/facter/facts.d/...
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3 votes
1 answer
132 views
RAID 10 not starting after all disks disconnected due to power outage - mdadm software RAID
I have a server and a connected JBOD/DAS with 4 16TB hard disks and a single 1TB hard disk. On the 1TB disk I installed Proxmox with Debian 12. Inside Proxmox, I then created a virtualized Arch Linux ...
0 votes
0 answers
90 views
How to debug ISO image loading via iPXE&HTTP?
In general, I'm trying to load the Ultimate Boot CD via HTTP (iPXE). The structure is as follows: CD ---\boot -------\grub -------\isolinux ---\pmagic -------\boot ------------\syslinux -------\...
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1 vote
0 answers
82 views
Minikube on Docker driver enters unrecoverable state after power loss, all pods in Error/CrashLoopBackOff
I'm running Minikube v1.32.0 with the Docker driver on Ubuntu 22.04. My setup includes Kubeflow with multiple namespaces (kubeflow, istio-system, auth, etc.). Problem Description After unexpected ...
3 votes
0 answers
57 views
Proxmox CT port is closed via bridge
I am running Proxmox server on 192.168.0.123 and have Alpine CT running using bridge on 192.168.0.101, both instances have Internet access, and they can PING each other. Alpine CT runs a service on ...
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1 vote
1 answer
82 views
multiple login methods sshd_config
I have several Linux servers. Most are configured to only accept logins with SSH keys, but for some servers, I need to be able to log in with both key and user/pass. The problem is that users who use ...
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1 vote
1 answer
72 views
How to share a folder on Windows Server 2022
Estoy usando Windows Server 2022 y quiero compartir una carpeta en la red para que otros usuarios puedan acceder. Hice clic en “Compartir” pero los demás no pueden ver ni abrir la carpeta. ¿Alguien me ...
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1 vote
0 answers
38 views
Bind 9.18 on a new server. Failing a lookup for a specific zone and record
I've deployed a simple bind server, and I'm failing for a single resource record/zone. We don't handle this zone in-house, so I would think that root hints would handle it the way we're configured. ...
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2 votes
1 answer
214 views
Linux bond0 with 802.3ad not receiving LACP response from MikroTik?
I’m trying to set up an 802.3ad (LACP) bond on Linux with four interfaces (ens3f0, ens3f1, ens2f0, ens2f1) connected to a MikroTik switch. The bond is configured with mode=802.3ad, miimon=100, ...
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1 vote
0 answers
58 views
Debian 12 server not booting after RAID disk replacement and rebuild on Hetzner
I have a Debian GNU/Linux 12 (Bookworm) server with a custom kernel running on Hetzner. Recently, one of the disks in my RAID1 setup failed, and Hetzner replaced the faulty HDD. After the replacement, ...
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1 vote
0 answers
80 views
404 and 400 Errors Accessing Keycloak Admin Console Behind NGINX Reverse Proxy (Keycloak 26)
I'm running Keycloak 26.0.8 in Docker behind an NGINX reverse proxy. It is also behind a VPN and has/should have no public accessibility outside the VPN (or only through NGINX). It runs virtually on ...
2 votes
1 answer
131 views
Java truststore missing on Void Linux server
I'm upgrading Jenkins on my void-linux server, which involves updating the JRE. I installed openjdk21-jre with xbps, deinstalled the old one (openjdk14-jre) and installed Jenkins 2.528. It started ...
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2 votes
2 answers
176 views
How do I identify and delete large directories and files
I know that this has been discussed many times, but I cannot find my problem. I am running Raspberry OS with docker containers. I have rebooted the system multiple times. These are the results of many ...
2 votes
0 answers
42 views
Multiple servers, one SSO reverse proxy
I have a need to secure our various internal services that have website interfaces with SSO. I have set up Keycloak and have configured it and those services that have built-in support for SAML or ...
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2 votes
1 answer
85 views
Which Linux distros need reboots the least frequent? [closed]
Which Linux distros need reboots the least frequent, are commonly available, and considered secure? I like Ubuntu, but it requires reboot every two weeks.
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0 votes
0 answers
37 views
Samba Active Directory unable to add additional member on group with objectClass groupOfNames
I have a samba Active dyirectory domain. The samba version I use is 4.22.3 but I notice the same issue also on previous versions. The issue is on groups with objectClass groupOfNames. Members can be ...
1 vote
0 answers
94 views
server's temporary partition being in read-only mode
I’m running a WHM server and need to create a backup. However, my server administrator informed me that some files on the server are corrupted. I also have a very large MySQL database (around 450 GB). ...
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3 votes
1 answer
67 views
ZFS fails to allow mount for user
I use zfs allow so a user can create and mount a dataset. But ZFS only allows the create operation. Can anyone provide insight as to why this should not work? As superuser: root@gem:~# modinfo zfs | ...
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2 votes
0 answers
33 views
Restore data from SSD [migrated]
is there a chance to restore at least /home if this happens: it was necessary to replace the disk in my wife's laptop. for some reason, I decided to do it at night, after putting the children to bed, ...
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1 vote
1 answer
75 views
Kernel threads number change between Debian 10 and 11
Upgrading an infrastructure based on Debian workloads, I can see my monitoring alerting when upgrade from Debian 10 to 11. Same hardware, same workload, same applications and services running I can ...
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2 votes
1 answer
188 views
Is using SSH with keys only, lock the user password entirely and enable no password sudo a valid option?
I was thinking of making these changes to my server. Will it work well from a security point of view. The ssh password access is already disabled and I only connect with a key. The root password is ...
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1 vote
0 answers
167 views
Join OpenStack servers to FreeIPA without changing the hostname
I have an OpenStack cluster. I installed FreeIPA on another server, and I want to join the controller and compute servers to the FreeIPA server without changing their host names. When I changed the ...
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0 votes
1 answer
36 views
Accessing an internal S3 implementation with s3fs
We have an internal S3 implementation at the firm, which is currently used by other teams using Java and Python. But for our purposes we must have the data accessible using filesystem calls, so I'm ...
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0 votes
1 answer
193 views
After upgrading Debian 9 → 12, sssd.service runs but sockets show failed
I upgraded a VM from Debian 9 (Stretch) to Debian 12 (Bookworm). SSSD service itself is active, but after reboot I see all the SSSD sockets as failed: systemctl --failed UNIT LOAD ...
1 vote
0 answers
71 views
Increasing net.netfilter.nf_conntrack_max leads to unavailable server
We are running debian bullseye kernel-5.10.0-35-amd64 with 2 10G NICs and one smaller NIC which is unused: 01:00.0 Ethernet controller: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection ...
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1 vote
0 answers
72 views
Unable to connect to Apache2 web server with SSL from CloudFlare
I spun up a Linux server on a Digital Ocean droplet, and successfully installed LAMP. The site works well, but not for HTTPS, which responds with this error: NET::ERR_CERT_AUTHORITY_INVALID. Clicking ...
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3 votes
2 answers
232 views
How to make Windows 10/11 USB flash install media from Linux?
When I flash Windows 10/11 ISO to USB drive on Linux using dd or Gnome's Disks utility the Windows installer can't find any drive for installation. What I'm doing wrong?
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1 vote
1 answer
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How to configure Nginx reverse proxy with Docker for nopCommerce to work with HTTPS?
Where this question can be asked May be server fault? I’m running a nopCommerce ASP.NET Core application using Docker containers on Linux. Setup: nopCommercecontainer (ASP.NET Core app, exposed on ...
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0 votes
1 answer
108 views
Could not increase number of max_open_files to more than 32768 in MariaDB 10.5.29 after upgrading from Debian 10 (buster) to Debian 11 (bullseye)
After upgrading from Debian 10 (buster) to Debian 11 (bullseye) I found that when starting mariadb service (MariaDB 10.5.29), I get the following warning: sudo systemctl start mariadb.service sudo ...
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1 vote
1 answer
45 views
Server shutting down unexpectedly [closed]
I have a media server that I recently converted from Windows 10 to Ubuntu Server (also tried Mint). While it was running windows, I had no issues and it ran continuously for the last several years. ...
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1 vote
0 answers
82 views
Performances for large files with NFS + cachefilesd
I'm using NFS v4 with Cachefilesd to share files between two Debian GNU/Linux (12.11 - Bookworm) servers located on the same network connected with a Gb link. All services configuration is default, ...
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1 vote
1 answer
90 views
Keep socat simulated serial port alive
I am working on a project for a platform that uses serial ports. During development, to reduce hardware use, and for convenience, we use socat to simulate the serial port. Software <-> socat <...
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0 votes
0 answers
66 views
Postfix restricted domain routing for ip ranges
I am configuring Postfix on a Rocky 9 internal mail relay server for my company. The general requirements are to allow any internal system to send to any internal address, which I am doing via the ...
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0 answers
24 views
How to implement timeout in sftp client using libssh?
I am developing an sftp client using blocking calls of libssh library. With libssh, there is an option to set connection timeout using SSH_OPTIONS_TIMEOUT. But documentations has no reference on how ...
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1 vote
1 answer
85 views
why does sudo docker ps -a return a different result than docker ps -a
I see this regardless of what I user I login as on the console (root or tuser): tuser@server $ docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS ...
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0 votes
0 answers
115 views
Why are there still DHCP records for NetworkManager in the logs even though the NetworkManager service is disabled in Almalinux 9.6?
I disabled the NetworkManager.service and enabled traditional network-scripts on AlmaLinux 9.6. Why does NetworkManager still perform a DHCP request during system startup? This causes the eth0 network ...
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0 votes
2 answers
267 views
AlmaLinux installed on a mdadm RAID1 array, no bootable devices detected
I got into command line from an installer USB for almalinux, created the mdadm RAID1 array, and it shows up in the available drives to install Alma on. I install it. It says it's finished. Remove ...
0 votes
1 answer
161 views
jstack: error while loading shared libraries: libjli.so
I copied a jstack executable from one linux machine to another because I'm not allowed to install programs on a revenue generating server. When run it produces the error: jstack: error while loading ...
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0 votes
0 answers
42 views
Use clamav to only scan email for viruses, not the whole filesystem
I run an Ubuntu web server and mail server. I'm the only person who ever uploads files to this server, from my Ubuntu desktop. I installed clamav-daemon and amavis so that emails passing through the ...
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5 votes
1 answer
337 views
What HP Smart Storage Adminstrator CLI tool needed for HPE Smart Array P440ar Controller?
I have a HPE Smart Array P440ar Controller at AlmaLinux 9.6 and I need to monitor its indicators. I've installed hpssacli-2.40-13.0.x86_64 but get APPLICATION UPGRADE REQUIRED: This controller has ...
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Unable to install from trixie-backports: "Invalid value for APT::Default-Release"
I recently installed the latest stable release of Debian (version 13 "Trixie"), released on August 9, 2025. After running sudo apt update, everything seems fine, but when I try to install a ...
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How to handle Struck Jobs in LSF?
I am using LSFjob manager on an HPC cluster. Occasionally the Ansys jobs become "stuck" during execution. Once the jobs are stuck the Ansys log and result files stop getting updated.The ...
0 votes
1 answer
149 views
Cannot create files under /tmp - No space left on device
The Problem I cannot write files to my /tmp directory. Pressing tab to autocomplete directory or file names returns: -bash: cannot create temp file for here-document: No space left on device Similarly,...
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1 vote
1 answer
162 views
IPv6 tunnel between 2 linux hosts
I've got 2 linux hosts running same kernel version. Both hosts have IPv6 public addresses. Both hosts can ping -6 each other. I'm trying to create IPv6 tunnel between them. HostA: sudo ip link add ...
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0 votes
1 answer
203 views
Zombie processes parented to systemd, but they aren't killed
A user on our compute farm has several defunct or zombie processes from the simulation software: It is well documented that I of course can't kill them; they're already dead. Further, at least some ...
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0 answers
137 views
Forwarded traffic never hits NAT POSTROUTING (StrongSwan)
Topology Remote client ──► Gateway-1 ◄─<site-to-site>─► VPN-2 | | (SNAT) (SNAT) | ...
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3 votes
1 answer
294 views
Path MTU on Linux when there are multiple routes with different MTUs
On my Linux (actually OpenWrt) device, I have two default routes: root@<>:~# ip route default via 10.111.7.76 dev eth1 proto static metric 10 linkdown default via <redacted> dev wwan0 ...
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