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Q&A

General Q&A about Linux and Unix-like operating systems

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In i3wm, how do I move a workspace with its windows to another screen?

In i3, is there a way to move an entire workspace to another monitor, including all windows it contains?

0 answers  ·  posted 40m ago by matthewsnyder‭

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In i3wm, how to create affinity between screens and workspaces?

I have multiple screens and I often connect and disconnect monitors while the system is running. i3 assigns a workspace to each monitor, but does so unpredictably. Sometimes my main monitor is work...

0 answers  ·  posted 41m ago by matthewsnyder‭

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In i3wm when moving windows, how do I also switch to the workspace if it's active?

Let's say I have workspaces 1, 2, 3 on screen A and 4, 5 on screen B. Currently workspaces 1 and 4 are active. With my current config, moving a window to another workspace never activates it. How...

0 answers  ·  posted 44m ago by matthewsnyder‭

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+0 −0
In i3wm, how do I tell which screen is which workspace?

I have multiple screens and I often connect and disconnect monitors while the system is running. i3 assigns a workspace to each monitor, but does so unpredictably. Both workspaces are highlighted a...

0 answers  ·  posted 1h ago by matthewsnyder‭

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+3 −0
How to extract string from file, run filter, and replace in file with new value?

TASK I am coding up ebooks to a specific standard, and have a script that converts a string into the correct titlecase for this publisher. When working with some public domain source files, one of...

3 answers  ·  posted 7d ago by David‭  ·  last activity 2d ago by David‭

60%
+1 −0
Run pipeline in the background from git hook

I'm trying to run a pipeline to update a PDF after every push to the 'main' branch. I want it to be atomic, so it doesn't touch the existing PDF until it has finished, so I need to use sponge(1) (...

1 answer  ·  posted 8d ago by alx‭  ·  last activity 6d ago by alx‭

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+1 −0
Lynis says my /etc/issue is weak - how to strengthen?

When hardening my system with Lynis I had information about /etc/issue and /etc/issue.net being found weak. Lynis redirects me to Enterprise, which is a paid product and a bit overkill for my home...

1 answer  ·  posted 18d ago by LAFK‭  ·  last activity 17d ago by LAFK‭

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VISUAL=gvim makes crontab -e open a new crontab instead of a current one

My VISUAL setup interferes with my cron jobs. crontab -l works all right, I see my previous jobs. crontab -e, crontab -e -u user-here - opens GVIM on an empty file checked cron.allow or .deny,...

1 answer  ·  posted 21d ago by LAFK‭  ·  last activity 17d ago by Quasímodo‭

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+0 −0
How to see VRAM with inxi?

What switches do I need to add to see my video RAM (VRAM) with inxi? inxi -G shows my video card model and other info, but not video RAM.

1 answer  ·  posted 1mo ago by matthewsnyder‭  ·  last activity 18d ago by matthewsnyder‭

75%
+4 −0
How to RTFM well to get a CLI command

I've met with the phrase RTFM often. I recognize it's value. However the manual pages are often hard to understand and written by people who know so much about the topic at hand, that they don't ev...

1 answer  ·  posted 19d ago by LAFK‭  ·  last activity 18d ago by alx‭

80%
+6 −0
Looking for a way to sync dotfile content between different machines without introducing security issues

I switch between three computers and have never been able to keep my dotfiles in sync. I cannot put them into source control because they contain sensitive data. So, my question is: how do I share ...

2 answers  ·  posted 22d ago by paulsweatte‭  ·  last activity 21d ago by LAFK‭

50%
+1 −1
How to change resolution of virtual terminal?

How can I rescale the Linux virtual terminals (ctrl + alt + {f1, f2, f3, f4, f5, f6}), so that a high-resolution display doesn't make the letters too small? I'd like to use 1080 or even 720 resolu...

2 answers  ·  posted 22d ago by alx‭  ·  last activity 22d ago by Canina‭

66%
+2 −0
Alternating 2 keyboard layouts with Key Combination

Sorry it was a typo, _ instead of -, that caused the problem. I want to have a key combination to alter the keymaps. It worked with one for us and one for hu, but now I want to use one key combina...

1 answer  ·  posted 23d ago by Arpad Horvath‭  ·  edited 22d ago by Arpad Horvath‭

60%
+1 −0
How to prevent keyboard layout modifications from affecting external keyboards

Using For the console: /etc/vconsole.conf ---- KEYMAP=dvorak For X Session: .xinitrc ---- setxkbmap -layout us -variant dvorak & Problem For the console, it applies the dvorak lay...

0 answers  ·  posted 28d ago by mcp‭  ·  edited 28d ago by mcp‭

71%
+3 −0
How to invert command exit code?

How to apply a logical not to a shell command, e.g. in a Bash script? So if the command exited with 0 (success) I would like it to be changed to a non-zero value, and if it exited with a non-zero ...

1 answer  ·  posted 30d ago by Iizuki‭  ·  last activity 30d ago by Iizuki‭

77%
+5 −0
How can I restrict filename characters?

Suppose I want to limit what characters are allowed in filenames. For example, I want file creation to fail if there is a \n in the name. Is there a way to enforce this? If it matters, I prefer a...

2 answers  ·  posted 1mo ago by matthewsnyder‭  ·  last activity 1mo ago by Basile Starynkevitch‭

75%
+4 −0
How to forward SSH access of one machine, through another, to the rest of a network?

I have a setup with two Raspberry PIs, a CM3 module with only a USB connection to the outside, and the Pi4 with a lot of connectors. I set up things such that CM3 functions as USB Gadget, and once...

3 answers  ·  posted 2y ago by CanisSomnolentus‭  ·  last activity 1mo ago by Michael‭

50%
+0 −0
Run command with Key Combination in Gnome

Is there a way in Ubuntu (22.04) to run a given bash command for a given Key combination in Gnome (42.9)? This Ubuntu is running in Hyper-V on a Win10 host. (I would like to run the setxkbmap us a...

1 answer  ·  posted 1mo ago by Arpad Horvath‭  ·  last activity 1mo ago by matthewsnyder‭

60%
+1 −0
How to fix the dark mode after the Gnome 1:44 update?

I recently updated Gnome to 1:44.0 and since the update my dark mode settings seem to be ignored for Gnome applications. When setting the dark style in Settings > Appearance, the desktop backgr...

1 answer  ·  posted 1mo ago by mr Tsjolder‭  ·  last activity 1mo ago by mr Tsjolder‭

60%
+1 −0
How to open a port in firewalld?

How to open a port when using firewalld as the system firewall?

1 answer  ·  posted 1mo ago by Iizuki‭  ·  last activity 1mo ago by Iizuki‭

60%
+1 −0
Rename multiple files which have a variable suffix

I compressed some JPEGs with curtail it messed up the filenames. It was supposed to only add -min at the end but ended up adding a random string after the extension 😠: prs@PC:/DOWNLOADS/Pictures$ ...

3 answers  ·  posted 2mo ago by Pr. Sunflower‭  ·  edited 1mo ago by matthewsnyder‭

75%
+4 −0
How to run a command on a list of files?

Suppose I have a list of files on standard input. These may be the output of find, cat filelist.txt or something else. How can I run a command on each file in turn?

3 answers  ·  posted 6mo ago by matthewsnyder‭  ·  last activity 1mo ago by alx‭

60%
+1 −0
How to tile multiple small page PDFs on a single standard size PDF?

Suppose I have a PDF which is 2x3 in. I want to create a PDF with a single page, which has multiple copies of this. For example, if the small pieces are in landscape, and the large page is in portr...

0 answers  ·  posted 2mo ago by matthewsnyder‭

pdf
60%
+1 −0
How to bypass SSH destination host key fingerprint check?

When you first connect to a host, ssh asks you about saving its fingerprint. If you do, on subsequent connections it will check the fingerprint and refuse to connect if it changed. I get that this...

1 answer  ·  posted 2mo ago by matthewsnyder‭  ·  last activity 2mo ago by Canina‭

ssh
71%
+3 −0
How to overwrite each line of STDOUT with the next one?

I wrote a filter program to overwrite each line with the next one. $ cat /usr/local/bin/ovr #!/bin/sh sed '2,$s/^/\x1B[1A\x1B[K/'; Here's the behavior: $ echo | ovr $ echo 'foo' | ovr ...

3 answers  ·  posted 2mo ago by alx‭  ·  last activity 2mo ago by Kamil Maciorowski‭

50%
+0 −0
How to list the first x files in each directory

MWE With the following tree: l1 └── l2 ├── d0 │   ├── f0 │   ├── f1 │   ├── f2 │   ├── f3 │   ├── f4 │   └── f5 ├── d1 │   ├── f0 │   ├── f1 ...

3 answers  ·  posted 2mo ago by mcp‭  ·  last activity 2mo ago by matthewsnyder‭

60%
+1 −0
How to identify and separate standalone applications from libraries in Linux package lists?

I want to generate a list of trending Arch/AUR packages that focuses on user-facing applications rather than background libraries and dependencies. I wrote a script that uses the data from pkgstat...

1 answer  ·  posted 2mo ago by ShadowsRanger‭  ·  last activity 2mo ago by alx‭

60%
+1 −0
How to create systemd unit that depends on a website being up?

I'm going to write some systemd services. All of these can only be run if a certain website is up. I thought I could create a ~/.config/systemd/user/website.service this: [Unit] Description=Confi...

1 answer  ·  posted 4mo ago by matthewsnyder‭  ·  last activity 2mo ago by Iizuki‭

60%
+1 −0
Vim key bindings not working in terminal python interpreter

MWE To reproduce: Add bindkey -v to your ~/.zshrc. Invoke python interpreter: python. Type something into the prompt without hitting ENTER: this = "this" + "that". Press ESC and try any vim ...

1 answer  ·  posted 10mo ago by mcp‭  ·  edited 2mo ago by mcp‭

60%
+1 −0
Ergonomic way to search man pages

You often have to read man pages to use Linux/Unix software. However, many man pages are not easy to read. They are very long, not always conveniently arranged, and man does not appear to have any ...

3 answers  ·  posted 3mo ago by matthewsnyder‭  ·  last activity 2mo ago by alx‭

50%
+0 −0
How to get a mailto: URI out of abook(1)

I store my address book with abook(1). https://manpages.debian.org/bookworm/abook/abook.1.en.html Let's say I want to introduce some contact in some field that accepts the usual name <email&gt...

1 answer  ·  posted 2mo ago by alx‭  ·  last activity 2mo ago by alx‭

60%
+1 −0
How does the root user locate executables?

A little while ago I was helping someone with running Python in a virtual environment, as root, for some specific purpose. I determined easily enough that this requires explicitly specifying the pa...

1 answer  ·  posted 2mo ago by Karl Knechtel‭  ·  last activity 2mo ago by r~~‭

66%
+2 −0
Higher-order functions in Bash?

Say I have some Bash function my-func, that expects a filename and does some processing on the corresponding file. For demonstration purposes, my-func() { cat "$1"; } If I want to apply that fu...

1 answer  ·  posted 2mo ago by Karl Knechtel‭  ·  last activity 2mo ago by Kamil Maciorowski‭

50%
+0 −0
Why does $XDG_DATA_HOME default to ~/.local/share?

Why does XDG_DATA_HOME default to ~/.local/share? Why not something less cryptic, like ~/.data? Why did they decide use that path?

1 answer  ·  posted 2mo ago by matthewsnyder‭  ·  last activity 2mo ago by r~~‭

xdg
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+1 −0
Nvidia docker runtime: Failed to create task for container

I installed the Nvidia container toolkit so I can use GPU acceleration in Docker containers. However, I can't get the containers to work: $ sudo docker run --runtime=nvidia nvidia/cuda:12.2.0-base...

1 answer  ·  posted 3mo ago by matthewsnyder‭  ·  last activity 2mo ago by matthewsnyder‭

66%
+2 −0
How to see all header fields of an email in mutt?

Neomutt (and probably Mutt too, but I didn't try) seems to be hiding header fields from email, such as the Message-ID field, and fields that are added by SMTP servers when they receive the message....

1 answer  ·  posted 3mo ago by alx‭  ·  edited 2mo ago by matthewsnyder‭

66%
+2 −0
How can I get a Flatpak dependency graph?

flatpak uninstall --unused currently tells me that there is Nothing unused to uninstall. This seems wrong to me, based on the list of packages I see vs. the "root" packages I explicitly installed p...

0 answers  ·  posted 3mo ago by Karl Knechtel‭

66%
+2 −0
Can I make a compressed RAM drive and externally prepare a (pre-)compressed file to copy onto it?

I don't know what these things are called exactly in the Linux world. But there is the concept of a drive in RAM, to write files onto and read them like it was any disk drive. There is also the c...

1 answer  ·  posted 2y ago by CanisSomnolentus‭  ·  edited 3mo ago by Quasímodo‭

71%
+3 −0
What are the concrete security risks of forcibly terminating a process?

I'm using the Gnome System Monitor in Linux Mint. Whenever I attempt to "End" or "Kill" a process, I am given this warning via a modal dialog (emphasis mine): Killing a process may destroy data,...

1 answer  ·  posted 3mo ago by Karl Knechtel‭  ·  last activity 3mo ago by matthewsnyder‭

66%
+2 −0
Are NixOS and Guix analogous projects?

From what I can tell, both NixOS and Guix are built around a package manager which, instead of installing package into the "common environment" as is traditional, isolates them to mitigate issues a...

1 answer  ·  posted 3mo ago by matthewsnyder‭  ·  last activity 3mo ago by r~~‭

66%
+2 −0
How do I tweak the start parameters of GUI apps?

There are many GUI apps on my computer that show up as eg. items in the start menu. When I launch these, what if I want to control how exactly they are launched, such as setting environment variabl...

1 answer  ·  posted 3mo ago by matthewsnyder‭  ·  last activity 3mo ago by matthewsnyder‭

60%
+1 −0
How to fix DPI for Spotify

Spotify runs on my computer with higher DPI (bigger UI elements) than I'd like. How can I reduce it?

1 answer  ·  posted 3mo ago by matthewsnyder‭  ·  last activity 3mo ago by matthewsnyder‭

60%
+1 −0
How do I find files?

How can I search for files on my system? Ideally, I would like to search by various criteria, like date, name, extension, etc.

1 answer  ·  posted 3mo ago by matthewsnyder‭  ·  last activity 3mo ago by matthewsnyder‭

60%
+1 −0
How do I globally configure consistent DPI for GUI apps?

How do I configure my system so that all GUI apps use a consistent DPI, without configuring each app individually?

0 answers  ·  posted 3mo ago by matthewsnyder‭

50%
+0 −0
How do you terminate a DHCP lease in OpenWrt?

I am testing some DHCP stuff, and I want to manually end a lease so I don't have to wait hours for them to expire. How can I do this with OpenWrt?

1 answer  ·  posted 3mo ago by matthewsnyder‭  ·  last activity 3mo ago by matthewsnyder‭

66%
+2 −0
How to get a new IP address from DHCP?

How do I make my computer request a new IP from DHCP? I am using Arch with NetworkManager.

1 answer  ·  posted 3mo ago by matthewsnyder‭  ·  last activity 3mo ago by matthewsnyder‭

60%
+1 −0
Static IP on wired LAN

I have an Arch Linux machine connected to a LAN by ethernet. The router runs OpenWRT. DHCP assigns IPs to this machine like 192.168.1.* - quite typical. I want the IP to always be 192.168.1.10. I...

2 answers  ·  posted 4mo ago by matthewsnyder‭  ·  last activity 3mo ago by matthewsnyder‭

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+0 −0
Dnsmasq vs. dnscrypt-proxy

I am trying to run a DNS server on my LAN. I set it up where: Dnsmasq is the "initial" server that clients see Dnsmasq resolves internal domains, and handles overrides (such as if I want to blo...

0 answers  ·  posted 3mo ago by matthewsnyder‭

75%
+4 −0
Documentation for double asterisk glob expansion

Where can I find documentation on double asterisk in glob expansion? It is discussed in the .gitignore section of Pro Git. It works in ls **/* to list all terminal files. It is supported by py...

2 answers  ·  posted 3mo ago by mcp‭  ·  last activity 3mo ago by Kamil Maciorowski‭

66%
+2 −0
Where does GtkFileChooserDialog store bookmarks?

I have some bookmarked folders in GtkFileChooserDialog. I want to add these to my dotfiles. Where are the bookmarks stored?

1 answer  ·  posted 3mo ago by matthewsnyder‭  ·  last activity 3mo ago by Quasímodo‭