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These questions are about Linux in general – NOT specific to a particular distribution.  If the question just happens to be in a Linux environment, please specify your Linux distribution in the body of your question, but do NOT use the “linux” tag.

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While trying to document myself about some less known Linux features I found some kernel mailing list discussions that contained a lot of advanced and counter intuitive technical knowledge, sparkled ...
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I'm constantly receiving HostMemoryUnderMemoryPressure alarms from a high-resource Linux server, which are triggered and immediately resolved. The alarm detail indicates a high rate of major page ...
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Many laptops in the educational market still have 1366x768 screens. A lot of programs and websites blindly assume a 1920x1080 screen, and leave important UI elements outside the screen (mostly dialog ...
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Sorry if this has been solved, but I would like to connect some drivers on Linux over I2C, but I only have USB available. I was going to use a FT4232 or FT260 USB to I2C; however, is there is a way to ...
Andrew Phillips's user avatar
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Why does the following line break the terminal when executed in a non-interactive shell, but doesn't have the same effect when executed in an interactive shell? for i in {1..10}; do sudo -u testuser ...
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I understand that IP address collisions are incredibly rare under IPv6. Most subnets are at least 64bit, meaning that the risk of true random collision is neglegable. However there are circumstances ...
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Job for cups.service failed because the control process exited with exit status error failure 1 code ○ cups.service - CUPS Scheduler Loaded: loaded (/lib/systemd/system/cups.service; enabled; ...
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I went directly to Opera.com and the Download for Linux did NOT have a "Download offline package" option that the other platforms listed did. The Linux Download only showed: "Prefer ...
charger68's user avatar
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I use nethack with ttyrec to archive my funny deaths. My only issue is that nethack uses as much screen space as possible to print log massages. I would like to limit it to only work with 80x24 ...
jptrzy's user avatar
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I am trying to connect various systems to a SMB share of a USB drive that is connected to a TP-Link router (TP-Link AC1750) and is shared as //192.168.0.1/sda1. Using the command (run as ROOT user): ...
uberheer's user avatar
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I am trying to ping several IP addresses / hostnames, and determine whether any of them respond. Starting from this question, I'm using the echo host1 host2 host3 | xargs -n1 -P0 ping -c1 -w2 approach....
Michael Firth's user avatar
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I'm using doas for privilege escalation together with a command-line program that calls into either sudo or doas (OpenDoas on Linux, this program does not support BSDs) for authentication when it ...
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What is the difference between chmod 755 and chmod 775?
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rsnapshot / rsnapshot.conf.default.in now has quite a few settings of the form @setting@, but there's no indication anywhere what those settings decode to. For example @CMD_CP@ doesn't seem to be ...
joharr's user avatar
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I'm exploring qemu system emulation with custom-built Linux kernels, starting with mips. To start, I'm trying to get to the point of the kernel simply panicking before I add a rootfs, but I can't even ...
r4dr3fr4d's user avatar
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I'm trying to use ECDSA (prime256v1) for signature verification in U-Boot (git tag "v2025.10"). I used the sample configuration from Verified Boot on the Beaglebone Black as a template. ...
James's user avatar
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On x86, the solution would be either PAE, but yet better is to use a 32-bit system with a 64-bit kernel. The physical memory of the planned 32-bit ARM system is only 3GB. I would like to increase it, ...
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DISTRO: Fedora 41 KDE GOAL: Im trying to automatically set some cpu parameters (per-CPU max frequency, governors, energy policy, etc.) during my boot process. I wrote a script to do this (it lives at /...
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OSTEP says Note that CFS utilizes a periodic timer interrupt, which means it can only make decisions at fixed time intervals. This interrupt goes off frequently (e.g., every 1 ms), giving CFS a chance ...
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Glad to a new keyboard and a mouse that have plenty of lights now, I've noticed this: When I turn on my computer the BIOS Power-On Self Test (POST) happens. And I can see that my mouse and keyboard ...
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Almost always I can see many smtp processes in ps aux command output like this: postfix 924674 0.4 0.0 44460 9212 ? S 18:54 0:00 smtp -t unix -u -c postfix 924675 0.2 0.0 44460 ...
Mehrdad Seyrafi's user avatar
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I have a system where I dual-boot linux and windows. When I switch between them, I usually do the following: Hibernate the old os Press the power button Select the new os in grub However, I would ...
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On the x86 platform, the int 3 instruction causes a breakpoint trap. For KVM, the Virtual CPUs can be configured to exit to the hypervisor on this trap, by enabling the flags KVM_GUESTDBG_ENABLE and ...
David's user avatar
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I made a Compute Instance with Oracle Cloud because I'm trying to run a python code 24/0. I have tried connecting to it all day with no results. Here's what went off in the PowerShell:PS C:\Users\...
Jakab Matyi's user avatar
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this is the first time I encounter a swap issue, I'm lost about how Linux is supposed to behave. I have a RHEL virtual machine running a batch processing RAM intensive application (100+GB RAM, 1GB ...
849856487764's user avatar
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I got confused when the dmesg output of an embedded system started with these messages: [ 0.000000] unchecked MSR access error: RDMSR from 0x8b at rIP: 0xc156f2b0 (microcode_loader_disabled+0x3b/...
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I want to benefit from HW encryption on a Samsung SSD, meaning I want the SSD controller to handle decryption/encryption. I have 2 SSDs that i want to use, one with Windows, one with Debian. Steps I ...
user786207's user avatar
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I need to safely run open-source tools inside a Linux container that may contain sensitive data. To prevent any potential data exfiltration, I want to block only this specific tool from accessing the ...
nik's user avatar
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In trying to figure out why my laptop was losing so much battery charge when closed, I'm seeing logs that suggest it's not staying in suspended state at all. I'm looking for help diagnosing why this ...
Marijn's user avatar
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1 answer
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Looking for a GUI app that has the features below: Can show CPU cores frequency graphs in time (both average or per core works) Can stress/load all the CPU cores for a significant amount of time (...
strider's user avatar
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This might be a trivial question: I have two hosts A and B that can access the internet behind NATs. Their NATs do not allow for hole-punching or any other way to connect them directly. Host C is a ...
Maku82's user avatar
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I'm an SSH scripting novice, so I'm trying to understand whether I'm just doing it wrong or there is an issue. Background: I'm trying to connect VSCode RemoteSSH to HuggingFace Space dev mode and ...
Ark-kun's user avatar
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I'm developing a remote cloud linux desktop application. Desktop Linux Client ----req----> on the Cloud such as Amazon. Client can change the ...
sysescool's user avatar
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I'm trying to set up a wireless print server for my Zebra LP2844, using a Raspberry Pi 3B. I'm a complete newbie so I've been following [this] [https://youtu.be/P3XRi-CD1a0?si=dZn_Wm8ekS8z0soQ&t=...
elviri's user avatar
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#!/bin/bash DefaultColor="\033[0m" GREEN="\033[32m" RED="\033[31m" PURPLE="\033[35m" YELLOW="\033[33m" CYAN="\033[36m" CmdOk="\033[...
Maxime's user avatar
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9 votes
2 answers
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I'm new to Linux, yet am now committing to Linux, probably formatting HDDs to run the ext4 file-system, for (almost) all work. I need to keep one Windows machine running an NTFS file-system for a few ...
Right Angle Media's user avatar
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1 answer
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Linux perf list shows a long list of PMU events on my Intel CPU, which are not defined in linux/perf_event.h. For example: $ perf list ... mem_uops_retired.load_latency_gt_8 But /usr/include/linux/...
xealits's user avatar
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Why does there appear to be a discrepancy between a process stack address within /proc/PID/maps compared to the stack start address within /proc/PID/stat, where the latter is a smaller subset of the ...
genericuser99's user avatar
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My laptop runs Linux/Debian/Testing. Its model is an ACER AN517-51-72CQ I am teaching Linux (at green-up-academy.com) with it. Running Xorg if that matters. How to configure so that a ViewSonic ...
Basile Starynkevitch's user avatar
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The snippet below: shows statistics for what appears to be the exact same memory mapping: same device number, same inode, same offset, same length (0x7f8656e78000-0x7f8656cbb000 = 0x7f2f4ef6a000-...
Thriller's user avatar
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I have Thinkpad T470s with Team Group MP33 512GB (SM2263XT controller, firmware S1218A3) nvme ssd disk which stopped working in Linux after a system update around 2 weeks ago. The drive works fine in ...
ksiadz510's user avatar
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3 votes
2 answers
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I'm stuck with this error without clue or reference how to solve it: I have this list on text.txt Angie Apple Angie Banana Angie Tomato Angie Peach Angie Onion I'm running substitution through ssed (...
Zerchro's user avatar
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Seeing as fapolicyd uses fanotify to prevent the execution of programs, is it possible to use fanotify to for security? Like, a program can be checked which file it's accessing and then deny if it ...
Melab's user avatar
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I have a few RHEL 8/9 boxes with a cron job that updates them automatically every week. The reboots are done manually from time to time and I would like to write a script to simplify the removal of ...
Fravadona's user avatar
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1 vote
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I have a btrfs volume, containing three devices: sda1, sdb1, sdc1. The data is single, the metadata is raid1. The hard drive /dev/sda is failing, so I can't mount my partition with -o degraded,rw; it ...
asm0dey's user avatar
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1 answer
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I would like to configure the mail command with procmail in order to filter spam with CRM114 and I cannot seem to find enough information on the subject. I have set up mailx with external mail and ...
Skar's user avatar
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I'm trying to copy a bunch of files (around 50000) from an include-file list. THe include-file has relative path to the files on the source folder. I'm using the following command : rsync -avPilHAXWE \...
François-Xavier Payet's user avatar
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1 answer
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A little background: I have a Lenovo ThinkPad T480s with an old Bluetooth module. I wanted to upgrade because, when connecting more than two devices at the same time, the mouse was lagging, and I ...
szelbi's user avatar
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2 votes
2 answers
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Update 2: Found below in dmesg for a single Fn key press/release (even on released this month Ubuntu 25.10): [ +4.340795] atkbd serio0: Unknown key pressed (translated set 2, code 0xf8 on isa0060/...
strider's user avatar
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In essence I want to have two mirror devices but also two copies of the data on each device. Will something like this work and behave as I expect? btrfs balance start convert=raid1,dup,soft /mnt/sdxn/
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