General Q&A about Linux and Unix-like operating systems
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Rationale Occasionally, audio from a very useful proprietary application is too quiet to be audible. This is impossible to remediate at the application level because: I am unable to request t...
Hello everyone đź‘‹ The problem I have ~200 video files (.MP4) that I would like to organise based on their dimensions. However, the Dolphin File Manager (that I installed with Flatpak) does not di...
I think I finally found a topic the Arch wiki doesn't cover :) I have a Zigbee USB dongle and some Zigbee-capable wireless devices. The dongle is supposed to create a network to which the devices ...
How to reset time in Ubuntu after replacing CMOS battery?
For certain GPU-accelerated tasks, such as Docker containers using GPU, I need to run the following on every boot: sudo nvidia-ctk cdi generate --output /var/run/cdi/nvidia.yaml Without this, G...
How do I solve the error 'Dependencies installation failed' when installing a program using an installer in Bottles? I'm using Bottles 51.15. Console log 15:08:16 (INFO) Installing dependenc...
Suppose I am the author of a shell utility called bar. One common use case is in pipelines like foo | bar, where foo sometimes runs interactively. I want to distinguish situations where interaction...
Suppose I write a Bash function at the command line: $ hello-world() { echo "Hello, world!"; } and I revise (perhaps hitting up-arrow to retrieve it from command history and edit it) and test a...
I am using Docker on Windows (from Powershell) to run a container that runs Rocky Linux. I can run GUI applications (e.g., xeyes) from the container by running VcXsrv on Windows, and setting DISPLA...
My goal is to create a clickable link in the terminal that opens an executable. I'm trying to do this using thefile: URI. For example, I want to open Blender whose executable is /usr/bin/blender. I...
I'm using xterm version 395-1, on Arch Linux, with i3 window manager. I like xterm because it's fast, and I can configure things like "what characters are in a word when you double click on a word"...
I am trying to connect to a VPN server (that I don't control) using IKEv2 and strongswan. The connection fails with [IKE] no trusted RSA public key found for 'xxx.xxx.xxx.xxx'. I downloaded the Sec...
How to convert a markdown file to PDF? The final PDF output should represent the rendered markdown file. Bonus points if the method also preserves colored emojis. Both CLI and GUI solutions are we...
I want my SysRq key to be fully functional. When I look in sudo sysctl -a I see kernel.sysrq = 1 in the output. This tells me it should be working. To test, I run echo h > /proc/sysrq-trigger ...
I have a partition and directory structure that looks like: small partition: / usr var ... # etc. large partition: /home shared other_stuff large_folder ...
I have this test setup: $ cat first #!./second one two three $ cat second #!/usr/bin/env python import sys for line in open(sys.argv[1]): print(line, end='') After chmod +x on th...
Hi, i need to setup a script to validate the raspberry hardware connected to a desktop PC, and im not sure how to go about it. We are in an environment where we need to flash an OS + some goodies ...
I'm trying to create a .desktop file which opens a file, either inside a Vim server named "VIM" if that server exists, or otherwise using the normal Vim .desktop file. My .desktop file is below. ...
Some context menus in my KDE installation show the following problem: When the menu is opened it shows normally. But as soon as I move the cursor over the menu, it becomes transparent and whate...
Docker stores data under directories like /var/lib/docker/overlay2/xyz123. These sometimes grow very large, and Docker does not provide good instructions for how to easily manage the space used by ...
Some Linux users prefer to have /home mounted on a separate partition from the filesystem root, while others prefer a unified partition. I can find plenty of tutorials out there for moving /home on...
I have a laptop running Ubuntu 24.04.1 LTS that I would like to access with Remote Desktop (or VNC)[1] from a Mac. I found the Ubuntu system settings to enable Remote Desktop and am able to connec...
I came across this in a bash script: excludes+=("${2-}") What is the meaning of ${2-}?
Suppose the machine is short on memory and the OOM Killer has selected a target process to shut down (in order to reclaim memory). How does the OOM killer actually kill the process? Is it done usi...
Hello everyone, I am encountering an issue when running pytest in my virtual environment. Although I have installed the required modules in my virtual environment using pip, I am still getting a M...
Can I disable the ability of regular users to enable lingering in loginctl? By default every user on a systemd enabled Linux can run loginctl --enable-linger and have a personal systemd instance s...
.tar.gz is a pretty common archive format. How to extract its contents, "unzipping" it in the command line?
I want to create a collage of 20 screenshots from a video, arranged in a 5x4 grid, regardless of the video’s length. How can I do this efficiently on a Linux system? Specifically, I’d like a way t...
I have a static website I serve with Caddy. The Caddy is inside a container. I notice that occasionally I get malicious requests, looking at the paths requested. Some examples are: /cgi-bin/luc...
You've just run df -h and are shocked how little disk space you got left. You'd like to find where all the space has gone. How to find big(est) files and directories on your system? (So that you c...
How do you find out the number of files in a directory from the command line?
Context I can't switch between keyboard layouts with Alt+CapsLock with Awesome WM (v4.3) on Debian 12. I would like to use a French layout and the Programmer Dvorak layout (dvp). I succeed to us...
I can't set two keyboard layouts with Awesome WM (v4.3) on Debian 12. Using the following configuration (in rc.lua config file of Awesome WM), only the french layout seems to be usable. The us lay...
Headless chromium gives me many errors: $ chromium codidact.com --headless [0914/093555.796025:ERROR:angle_platform_impl.cc(44)] Display.cpp:1086 (initialize): ANGLE Display::initialize error 0: ...
I want to run programs foo and bar with supervisord. Both programs produce a continuous stream of occasional output (stdout and stderr) as they run. When I run supervisor with nodaemon=true, I wan...
I'm using Awesome WM (v4.3) with Tyrannical plugin on Debian 12 and I observe an unexpected behavior of VSCodium. Using the following configuration (in rc.lua config file of Awesome WM), when I st...
How to migrate a single device BTRFS filesystem to a new drive? I don't want to send individual subvolumes, but instead the entire filesystem with its subvolume layout intact. Changing the filesyst...
Looking for a command to show the model(s) of the system's GPU(s). It doesn't matter if it shows other related info too, as long as the model doesn't get buried.
How to find the exact path to an executable file present in your PATH. I.e. commands you can call by just their names. E.g. what executable gets called when I type find and hit enter? $ hypotheti...
I searched for "what is the most accurate lines of code counter linux", but didn't get relevant results. This tcount CLOC project says that it's somehow better than others ones. I don't really beli...
I'm a complete beginner, and just installed Linux for the first time. I chose a popular distribution, but I've run into some issues, or have a few questions. However, I don't know if I have Gnome, ...
I just installed an SSD into my motherboard's third M.2 slot. After I booted up the computer, the secondary disk is now displayed like an externally connected one. There's an icon for it on the des...
Problem I have Super+. mapped to Switch to workspace on the right in gnome settings keyboard shortcuts. It works everywhere except when focus is on the terminal. There, it enters an e in the termi...
I am experiencing hardware or software problems that I cannot explain, or find a solution for. As part of the troubleshooting process, I have now arrived at running an older version of the OS from ...
I have a TLS certificate, let's say codidact.pem (downloaded as in https://linux.codidact.com/posts/292251/292257#answer-292257). But when I view it the file it appears to be base64 encoded: $ cat...
What command can be used to download the TLS certificate of a site such as https://wikipedia.org?
How to display details about a site's certificate using CLI tools?
Online, I often see someone tell people to run a command like /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" (example from https://brew.sh/). The g...
At the most embarrassing time, Firefox on my Ubuntu laptop wouldn't connect to any websites. I've narrowed it down to a DNS issue. I can ping IP addresses, sftp to the computer, etc. The problem af...
A lot of games are made for Windows, and don't have an official Linux version. Can you play these on Linux? Asking specifically about games, not all programs, because games have a lot of additiona...
