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Q&A

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

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50%
+0 −0
unable to access Manjaro (kernel file not found)

I have Prime OS and Windows 10 alongside Linux Manjaro. I was using Prime OS nearly 2 hours. Then, I turned off my laptop for 30-60 minutes. Then, I turned my laptop on and I was using Windows 10 f...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by deleted user

71%
+3 −0
VPN tunnel for outgoing connections but still allowing incoming bidirectional connections, using Wireguard or OpenVPN on Linux

For a particular use case, I need to be able to set up a Linux host (specifically Debian) to use a VPN tunnel for routing outgoing connections, but still allow incoming connections outside of that ...

0 answers  ·  posted 2y ago by Canina‭  ·  last activity 9mo ago by Mithical‭

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

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

50%
+0 −0
Grub rescue error

I was using Linux mint and Windows 10 together (in different partitions). Few months I was using it freely. Today I got a message in Windows 10 (new updates available or shutdown and update) then, ...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by deleted user

50%
+0 −0
USB host: any special kernel option(s) needed to detect Gadget devices?

I have a custom, ARM Cortex A53 based Linux system, based on Buildroot one RaspberryPi CM3 module, connected to the other system via USB The USB gadget is correctly set up on the CM3 module ...

0 answers  ·  posted 3y ago by sktpin‭

77%
+5 −0
How do I safely replace brew on Big Sur?

I'm still trying to solve my problem with installing Ruby on a new Mac, and some discussions are saying that I need to reinstall brew because of the change from the old chipset to the M1. (I'm jus...

4 answers  ·  posted 2y ago by Monica Cellio‭  ·  last activity 4mo ago by matthewsnyder‭

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 2y ago by Quasímodo‭  ·  last activity 2y ago by Quasímodo‭

22%
+0 −5
Do shells have anything to do with port forwarding or port triggering?

I find port forwarding and port triggering as advanced sub-topics of the topic of network protocols which include the "port" concept such as TCP and UDP. I am wondering if shells in general and Ba...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by LawrenceC‭

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 .                                                .‭

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 3y ago by deleted user  ·  edited 1y ago by fedorqui‭

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

47%
+9 −10
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 ...

7 answers  ·  posted 3y ago by deleted user  ·  last activity 6d ago by catexotica‭

75%
+4 −0
How to configure GNOME Keyring to by default NOT automatically unlock keyrings whenever logged in, on Debian?

On a Debian Buster system I use, the password for connecting to a VPN is stored in the GNOME Keyring. Therefore, whenever I want to connect to the VPN in question, I get prompted to unlock my keyri...

1 answer  ·  posted 3y ago by Canina‭  ·  edited 3y ago by deleted user

60%
+1 −0
Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock'

I have installed mysql-server on Ubuntu 20.04 then I tried to sign into mysql-server using sudo mysql -u root but I have got Error: Can't connect to local MySQL server through socket '/var/run/mys...

2 answers  ·  posted 3y ago by Kevin M. Mansour‭  ·  last activity 3y ago by Kevin M. Mansour‭

60%
+1 −0
How do I prevent remote syslog events from printing locally?

I have a GNU/Linux host that I use to aggregate syslog events from a few switches, printers, and generally less versatile hosts on my LAN. I set up rsyslog years ago to listen on UDP:514 and save ...

1 answer  ·  posted 2y ago by re89j‭  ·  last activity 1y ago by bgstack15‭

71%
+3 −0
Why does the file command fail to recognize non-text files as such?

POSIX defines Text file as A file that contains characters organized into zero or more lines. The lines do not contain NUL characters and none can exceed {LINE_MAX} bytes in length, inclu...

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

71%
+3 −0
Disable transient symbols for compose and dead keys in GTK programs

An article in the GTK blog explains the situation very well, but here is my go at it. In my keyboard layout, accents are handled as dead keys, so to insert "ë", first I type ¨ and then e. Nothing ...

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

71%
+3 −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 matthewsnyder‭

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

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

40%
+0 −1
Why I can't use dark theme in Manjaro?

I was using Chrome for a moment in Manjaro. My theme was Adwaita dark which I chose from Tweaks. Suddenly, I noticed my theme was changed for no reason. I had updated my system 4-5 hours ago. When ...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by deleted user

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

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

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

72%
+6 −1
How do I get lubuntu to not prompt non-admins about updates?

I have an old Mac Mini (Late 2009 model) kicking around, and as Apple stopped providing patches for it (and as I'm not going to put an unpatched system on the Internet), I was looking for a Linux d...

1 answer  ·  posted 3y ago by Peter Cooper Jr.‭  ·  last activity 3y ago by deleted user

60%
+1 −0
How to use Avro in Linux?

I am using Manjaro(Arch-based Linux). And, I had installed Avro using the following command by getting help of the documentation yay -S ibus-avro-git Avro is software using that software user w...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by deleted user

50%
+0 −0
How can I access Manjaro without any error? (I had installed two grub-loader)

I was using Manjaro. And, I had Windows alongside Manjaro. I have installed Debian without "removing" any OS (I had removed Prime OS). And, I was using grub-loader of Manjaro earlier (Manjaro's gru...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by deleted user

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

66%
+2 −0
grub loader can't detect Bliss OS | Shell

While this is about grub loader, this is likely to be a question of OS related. If it doesn't belong to this site than I will remove it. I had installed Bliss in sda2. Device Boot Start...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by deleted user

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

80%
+6 −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 3y ago by CanisSomnolentus‭  ·  last activity 3mo ago by Michael‭

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

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

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

77%
+5 −0
Reverse shell with named pipe and netcat

This blog post describes a privilege escalation, exploiting tar's --checkpoint-action option. The privilege escalation is used to solve a TryHackMe challenge. The root user calls tar via cron whi...

1 answer  ·  posted 2y ago by Matthias Braun‭  ·  last activity 10mo ago by Kamil Maciorowski‭

22%
+0 −5
Is it possible to write more than 1 equation in LO Math? [closed]

I was using Libre Office Math. I thought I can write multiple equations in LO Math. But, I noticed I can't write more than one equation. I was trying to write multi-line. Unfortunately, I couldn't....

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by deleted user

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 3y ago by deleted user  ·  edited 1y ago by Trilarion‭

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

50%
+0 −0
printer installation in Linux

I had write some texts in LibreOffice Writer. Now, I want to print them to pages. For that reason, we use "printer". My printer's name is HP laserJet P1007. In Windows, I can simply download from h...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by deleted user

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

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 3y ago by sktpin‭  ·  edited 1y ago by Quasímodo‭

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

75%
+4 −0
What is the best way to identify changes from the default configuration in Raspbian systems?

I've got a Raspberry Pi running Raspbian, which I'd like to reinstall from scratch. However over time I've made many changes to the configuration (installed new packages, changed the name of the de...

1 answer  ·  posted 3y ago by celtschk‭  ·  last activity 3y ago by Canina‭

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 3y ago by sktpin‭  ·  last activity 2y ago by sktpin‭

66%
+2 −0
Your Ruby version is 2.7.0, but your Gemfile specified 2.6.6.

In my Ruby project, when I try bundle install, I got: Your Ruby version is 2.7.0, but your Gemfile specified 2.6.6 I don't know how to solve it. I am using Windows Subsystem for Linux (WSL) U...

2 answers  ·  posted 3y ago by Kevin M. Mansour‭  ·  edited 3y ago by deleted user

71%
+3 −0
Is this a robust way to distinguish explicitly installed packages from those pulled in as dependencies?

When exploring the commands from this answer to my previous question, I found that the ist of packages includes a lot that were automatically installed due to dependencies. Obviously I'm interested...

1 answer  ·  posted 3y ago by celtschk‭  ·  last activity 3y ago by Peter Taylor‭

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