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Q&A

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

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66%
+2 −0
How to install printer driver for Canon PIXMA TR4522 printer in Arch Linux

I have used printers before in Arch Linux, but I can't figure out how to print with a Canon PIXMA TR4522 printer. More specifically, I am having trouble finding the correct driver. I have installe...

1 answer  ·  posted 2y ago by Trevor‭  ·  edited 1y ago by Trilarion‭

50%
+0 −0
Intel® Centrino® Advanced-N 6205 not found in Debian

I was installing Debian. But, I know that I have installed wireless connection system manually in Debian. are e needs non-free firmware files to operate. The firmware can be h as a USB stick o...

2 answers  ·  posted 2y ago by deleted user  ·  edited 1y ago by Canina‭

66%
+2 −0
"A server is already running" error in rails

..$ rails s => Booting Puma => Rails 5.2.6 application starting in development => Run `rails server -h` for more startup options A server is already running. Check /home/istiak/ruby/q...

2 answers  ·  posted 2y ago by deleted user  ·  edited 1y ago by Trilarion‭

60%
+1 −0
Preserve the sources extracted by dpkg-source so as to save time

It takes a long time to build even the source package for a PPA of a huge project, and while the build isn't finished my computer is under heavy load so I can barely navigate a browser. The frustra...

1 answer  ·  posted 1y ago by Quasímodo‭  ·  last activity 1y ago by Quasímodo‭

80%
+6 −0
How do I deal with a "pending update to "snap-store" snap, close the app to avoid disruption" notification in Ubuntu 22.04?

For several days now, I've been getting a notification telling me that there's a pending update to the "snap-store", and to close the app to avoid disruption. I first got this notification while...

1 answer  ·  posted 1y ago by Mithical‭  ·  last activity 1y ago by Quasímodo‭

80%
+6 −0
Does /proc/config.gz always contain all supported options of a kernel?

Assuming I have a running Linux system that has the /proc/config.gz file: Does the (unpacked) file always contain all of the options the particular kernel supports, including commented out like: ...

1 answer  ·  posted 2y ago by sktpin‭  ·  edited 1y ago by Quasímodo‭

84%
+9 −0
What are phased updates, and why does Ubuntu use them?

So I ran into that weird "packages being held back" problem while updating my system using apt. After some research, it appears to be the result of "phased updates". What are phased updates, any...

1 answer  ·  posted 1y ago by ArrayBolt3‭  ·  last activity 1y ago by ArrayBolt3‭

66%
+2 −0
Set compose key to Shift + AltGr

I have upgraded Xubuntu from 20.04 to 22.04 and my compose key, which defaulted to Shift + AltGr, was disabled. It is no longer available in the keyboard settings GUI either. How can I set the com...

1 answer  ·  posted 1y ago by Quasímodo‭  ·  last activity 1y ago by Quasímodo‭

60%
+1 −0
xrandr rotate not filling external monitor

Problem I can rotate output, but it does not fill screen. Instead it rotates in place so that the right side of the screen goes off the monitor. xrandr --output HDMI-2 --auto --mode 1920x1080 --...

1 answer  ·  posted 1y ago by mcp‭  ·  last activity 1y ago by mcp‭

60%
+1 −0
Who creates subdirs under `/run`?

A system daemon needs to create several files under /run/program-name/ (and possibly other subdirs of that). They are the PID file, and at least one Unix socket file (but maybe more). The FHS spe...

1 answer  ·  posted 1y ago by alx‭  ·  edited 1y ago by alx‭

40%
+2 −4
How to give password in shell script?

That's my Bash script: #!bin/sh cd qpixel sudo systemctl enable mysql mysql -u root -p rails s When it executes the line mysql -u root -p it will ask for password. To do so, I have tried...

1 answer  ·  posted 2y ago by deleted user  ·  edited 1y ago by fedorqui‭

60%
+1 −0
Running `bashcompinit` in zsh to enable use of bash completion specifications gives "command not found"

I'd like to use the answers in this post while using zsh: compgen -c # will list all the commands you could run. compgen -a # will list all the aliases you could run. compgen -b # will list a...

0 answers  ·  posted 1y ago by mcp‭  ·  edited 1y ago by Canina‭

zsh
62%
+3 −1
How to edit file from less

MWE touch d less d # jump to editing d without leaving less Question Is there a way to edit a file from viewing it in less? Jumping straight into Vim would be preferred, but an answer for e...

1 answer  ·  posted 1y ago by mcp‭  ·  last activity 1y ago by celtschk‭

66%
+2 −0
How to make vi-mode bindings in terminal copy to clipboard

If I want to yank my last command I can UP yy, but this does not copy to the system clipboard. How do I configure my terminal to copy to the system clipboard so I can paste into other programs? ...

1 answer  ·  posted 1y ago by mcp‭  ·  last activity 1y ago by deleted user

66%
+2 −0
Bind brightness/volume and other special Fn keys in a tty

I am running Debian stretch on a Lenovo laptop with only a window manager (i.e. no desktop). Out of the box, this configuration of Debian ignores the keys with special Fn functions, such as volum...

1 answer  ·  posted 1y ago by Quasímodo‭  ·  last activity 1y ago by Quasímodo‭

81%
+7 −0
What does a minimal /etc/hosts need to contain?

I run an environment that, until recently, did all local name resolution by putting names in /etc/hosts. I'm in the process of replacing that with local DNS. The DNS part works fine, and now I'm tr...

1 answer  ·  posted 2y ago by ajv‭  ·  last activity 2y ago by dsr‭

77%
+5 −0
Installing Ruby on MacOS 12.2 (or 11.6) produces compilation errors in the downloaded source; how do I fix?

A project I want to work on requires Ruby. I was directed to RVM or rbenv. I tried rbenv first because it has Mac instructions, ran into failures, uninstalled it and installed RVM, and still ran ...

1 answer  ·  posted 2y ago by Monica Cellio‭  ·  edited 2y ago by Monica Cellio‭

77%
+5 −0
Capture separate _and_ combined stdout/stderr

Using BASH, how can I redirect stdout and stderr each, to two separate files, simultaneously? That's a mouthful, let me clarify a little: I have a hypothetical script that may/will generate outpu...

1 answer  ·  posted 2y ago by jaybeers‭  ·  last activity 2y ago by Quasímodo‭

50%
+0 −0
Automated wifi 'scavenging', daemon recommendation?

I have a RPi in the car that I need to act as a mobile AP. I need it to provide a consistent, unchanging ESSID (in AP mode) using the onboard wlan0 for all devices that stay in my car. Dashcams, t...

0 answers  ·  posted 2y ago by re89j‭

80%
+6 −0
A shell script that can run under different shells

I have a shell script with a syntax compatible to both bash and zsh, except for a section that has zsh specific syntax that throws syntax errors if sourced from bash. Is there an easy way to escap...

2 answers  ·  posted 2y ago by 4015.alt‭  ·  last activity 2y ago by mjy‭

75%
+4 −0
Desktop Multiplexer for Linux? (GNU Screen for GUI apps)

GNU Screen and Tmux allow you to run command-line programs on a server, and 'disconnect' from them but let them keep running remotely. This is great if your primary computer is a laptop and it has...

1 answer  ·  posted 2y ago by re89j‭  ·  edited 2y ago by re89j‭

42%
+1 −2
sensors to histogram

I would want to... ... turn my sensors output into a live histogram. How to? Any available script already written? (✿◠‿◠)

1 answer  ·  posted 2y ago by .                                                .‭  ·  edited 2y ago by .                                                .‭

60%
+1 −0
Reducing Noise from yum-cron when repos are out of date

I have a few CentOS servers that I want to stay automatically up to date with yum-cron, and I want to get emails when there are problems but I do not want to get so many emails about repos being ou...

0 answers  ·  posted 2y ago by re89j‭  ·  edited 2y ago by Canina‭

80%
+6 −0
Why is Pause/Break key is immediately released? Can that be fixed?

Since the Pause key is useless, I tried to map it to a modifier key. What is straightforward for other keys turned out not to work fine for Pause. By inspecting the output of xev -event keyboard |...

1 answer  ·  posted 2y ago by Quasímodo‭  ·  last activity 2y ago by Quasímodo‭

66%
+2 −0
Scalable fonts are not loaded into the X server database

I have some old X11 applications complain that they cannot find a ISO8859-2 font. So I executed grep -r 8859-2 /usr/share/fonts/ and, to my surprise, found many matches, for example ==> /us...

1 answer  ·  posted 2y ago by Quasímodo‭  ·  last activity 2y ago by Quasímodo‭

71%
+3 −0
What does capital T mean in the output of 'ls -l'?

I had a nightly cronjob start throwing errors about "inappropriate permissions..." rsync: [generator] failed to set permissions on "/data2/home/redacted/alsoredacted/opt/dell/srvadmin/var/log/open...

2 answers  ·  posted 2y ago by re89j‭  ·  last activity 2y ago by Quasímodo‭

71%
+3 −0
Why is libvkd3d1 not upgrading on my system? (lubuntu 20.04 LTS)

Why is libvkd3d1 not upgrading on my system? (lubuntu 20.04 LTS) When I run sudo apt update, apt flags libvkd3d1 and libvkd3d1:i386 as upgradable, but sudo apt upgrade does nothing and reports tha...

1 answer  ·  posted 2y ago by Darth_Muldoon‭  ·  last activity 2y ago by Canina‭

66%
+2 −0
I deselected a package and changed my mind. How to select it without re-emerging?

I executed emerge --deselect xournalpp , which means "I don't need the xournalpp package anymore", so it can be removed by a future --depclean action in case Portage figures xournalpp is not a ...

1 answer  ·  posted 2y ago by Quasímodo‭  ·  last activity 2y ago by Quasímodo‭

66%
+2 −0
Quickly increase virtual console ("TTY") font size on the fly

I just want to "zoom in/out" in the text console, is there a straightforward command to do that? I have found various sources (1, 2, 3) that either suggest permanent changes (e.g. modifying config...

1 answer  ·  posted 2y ago by Quasímodo‭  ·  last activity 2y ago by Quasímodo‭

57%
+2 −1
Unpacking .zst files on Ubuntu

How one may unpack .zst archived on Ubuntu? I received .zst archive file and I am looking for a way to unpack it.

1 answer  ·  posted 2y ago by Runaway_from_you_know_what‭  ·  last activity 2y ago by Runaway_from_you_know_what‭

45%
+7 −9
Which Linux system to use?

Usually, many new users are confused when it comes to deciding which Linux to use. After trying out some distros, they don't know which one to use next. Which Linux is for beginners, intermediates ...

4 answers  ·  posted 2y ago by deleted user  ·  edited 2y ago by Matthias Braun‭

60%
+1 −0
How can you create a separate home partition using LVM?

I'm currently using Fedora 34 and want to install Fedora 35 while keeping around just my home folder. Currently I don't have a separate home partition, but I read online that it's easy to make one ...

1 answer  ·  posted 2y ago by true_blue‭  ·  edited 2y ago by true_blue‭

75%
+4 −0
Make Less use a normal view instead of hexdump view

Less does not display data files normally, but if it were some sort of Xxd. $ bash --norc $ export LESS= $ file -i /var/log/lastlog /var/log/lastlog: application/octet-stream; charset=binary $...

1 answer  ·  posted 2y ago by Quasímodo‭  ·  edited 2y ago by Quasímodo‭

71%
+3 −0
Close all desktop notifications

I'd like to hide/dismiss/remove all the notifications that applications like Signal have created. I know I can create notifications with, for example, notify-send -t 10000 "🤖 Here goes my message"...

1 answer  ·  posted 2y ago by Matthias Braun‭  ·  last activity 2y ago by Matthias Braun‭

85%
+10 −0
In a bash shell script, how to filter the command line argument list to unique entries only, for processing each?

I have a handful of shell scripts that accept any number of command line arguments, then do some relatively expensive processing based on each command line argument in turn. The general format for ...

3 answers  ·  posted 2y ago by Canina‭  ·  last activity 2y ago by Quasímodo‭

66%
+2 −0
Docking station block playing of audio on laptop

How can I manually set default audio device? I connected docking station and Lubuntu is somehow convinced that it can play audio. I want to continue using laptop speakers. Detaching docking stati...

1 answer  ·  posted 2y ago by Runaway_from_you_know_what‭  ·  last activity 2y ago by Runaway_from_you_know_what‭

33%
+1 −4
Substituting text in a sed like manner but with a richer format

I have the following problems working with sed: It doesn't allow multiline operations (thus, no indentations, no nesting) It is generally obligatory to wrap entire commands in quote marks (sed ...

1 answer  ·  posted 2y ago by deleted user  ·  last activity 2y ago by user53100‭

77%
+5 −0
How to figure out the licenses of files installed from packages?

On a Linux system, a lot of files are installed from packages, many of which have different licenses (and sometimes different licenses for different files in the package). If I want to figure out ...

1 answer  ·  posted 2y ago by celtschk‭  ·  last activity 2y ago by Quasímodo‭

25%
+0 −4
Is there possible way to change bit if my system is using 64 bit kernel?

Is it possible to change bit of a system? My system is using 64 bit kernel. I was trying to install chrome in my system. But, I couldn't since chrome doesn't support 32 bit. Since my system is usin...

1 answer  ·  posted 2y ago by Anonymous‭  ·  edited 2y ago by Anonymous‭

bit
28%
+0 −3
Why I can't update my system? (Kali Linux)

I had installed Kali Linux recently. I can't update or upgrade my system. Even, I can't install anything. Here's the error log apt update Get:1 http://kali.cs.nctu.edu.tw/kali kali-rolling InRele...

1 answer  ·  posted 2y ago by Anonymous‭  ·  last activity 2y ago by Anonymous‭

28%
+0 −3
Why can't I install google-chrome?

apt install google-chrome-stable_current_amd64.deb E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) E: Unable to lock the administration directory (/var/lib/...

1 answer  ·  posted 2y ago by Anonymous‭  ·  last activity 2y ago by Anonymous‭

60%
+1 −0
With a V4L2-compatible webcam, how to see its video feed for the purpose of adjusting aiming?

I have ordered (but am still waiting for it to arrive) a USB-connected webcam that is supposed to be V4L2 compatible. Once it arrives, I'm obviously going to want to mount it such that it provides...

1 answer  ·  posted 2y ago by Canina‭  ·  last activity 2y ago by Quasímodo‭

60%
+1 −0
Trying to print with CUPS from Chromebook through Debian box to USB printer

Hi everyone, First post! I'm trying to be able to print from a client machine over my lan to an older HP Laserjet 1012 connected via USB to a Debian box. It prints fine directly. I've gone thro...

0 answers  ·  posted 2y ago by kserwick‭  ·  edited 2y ago by kserwick‭

71%
+3 −0
How to detect if a Linux Docker host has had unwelcome guests?

I plan to set up a Raspberry Pi to host some dockerized apps, for it to be accessible to the Internet through a remote proxy, and since I'm no sysadmin, I'm trying to come up with a suitable policy...

1 answer  ·  posted 2y ago by nnlei‭  ·  last activity 2y ago by Canina‭

37%
+1 −3
Running several commands without && or ; or ()

I copy-paste several commands at once from a markdown editor (Typora) to Bash in a Putty window terminal; the file I work with reads as follows (empty lines included): $ non sed command 1 $ non s...

1 answer  ·  posted 2y ago by deleted user  ·  last activity 2y ago by Grove‭

60%
+1 −0
What are IUSE flags?

Every Gentoo user knows USE flags. Occasionally I stumble upon IUSE flags, for example, man emerge mention them in the description of an option: --newuse, -N ... USE flags may be toggled by yo...

1 answer  ·  posted 2y ago by Quasímodo‭  ·  edited 2y ago by Quasímodo‭

50%
+1 −1
Is it possible to install .deb file on arch-based Linux?

Is it possible to install .deb extension file in Arch-Based Linux? I saw there's no dpkg package. But, if installing .deb file possible than, how?

2 answers  ·  posted 3y ago by deleted user  ·  last activity 2y ago by Grove‭

66%
+2 −0
Access host device which bridges a connected device through same eth interface

I got 2 small computers running Linux. One acts as ethernet gadget, connected via USB to the other, the host. I set up a bridge, like so: ip link add name br0 type bridge ip link set dev br0 up...

1 answer  ·  posted 2y ago by sktpin‭  ·  last activity 2y ago by sktpin‭

50%
+0 −0
Ruby installation in Manjaro (Arch-Based Linux)

I was reading the documentation. In Debian based Linux, I have to install build-essential, libssl-dev. But, what about Arch-Based Linux? I had tried sudo pacman -Syy build-essential libssl-dev ...

2 answers  ·  posted 3y ago by deleted user  ·  last activity 2y ago by Anonymous‭

71%
+3 −0
How to use a detected USB RNDIS gadget as network adapter

I have a RaspberyPi module, with USB connected to another module computer (as USB host) running Linux. The RasPi is configured as USB ethernet gadget. Once I boot the RasPi, and enter dmesg on th...

1 answer  ·  posted 2y ago by sktpin‭  ·  last activity 2y ago by sktpin‭