General Q&A about Linux and Unix-like operating systems
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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...
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...
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...
Question How do you specify underscores as Vim word boundaries when using vim mode in either bash or zsh? MWE w on this_word should place the cursor on the underscore. A second w should place th...
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...
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...
In Debian-based distributions, one can update the system with apt upgrade and cleanup unused dependencies with apt autoremove. Period. On Gentoo that is apparently not as straightforward. From G...
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...
How do I get the URL of the remote repository that pacman uses to download packages? I know that I can tell pacman which server to use by editing /etc/pacman.d/mirrorlist. But in my case, all of t...
Problem I want to set a global keyboard rate for both the X session and the console that persists for external keyboards, across plug-ins and removals. To my understanding, Xorg and console sett...
Question How can I view storage usage breakdown by media type? MWE Notes Commandline would be great, but open to anything.
I use Wine to play Windows games. As is well known: Wine is not a sandbox Windows games are proprietary blobs and can contain malware Windows malware can potentially harm Linux through Wine ...
I run Windows games with Wine, and use bwrap to sandbox them. I've noticed that passing --unshare-net to disable the network breaks many, many games (they fail to start with no obvious error messag...
****Since upgrading to Ubuntu 22.04 recently, immediately after a reboot I have WiFi to an internet hotspot as I did prior to upgrading. After suspend then resume, the network is no longer working...
When I enter the login password incorrectly 3 times, my computer locks me out from attempting a login for 10 minutes. How can I increase the number of attempts?
I am using Linux Mint 20.3, with Cinnamon as a window manager. I have a folder named .pytest_cache on my Desktop: $ ls -1A | grep '^\.' .pytest_cache I know that if I open a Nemo window, navi...
After a force shutdown on Ubuntu 22.04, installed on a Lenovo Legion 5, the OS seems to have lost its ability to recognize the built-in touchpad or to connect to the internet. For the backstory......
How do I make my computer request a new IP from DHCP? I am using Arch with NetworkManager.
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 ...
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 ...
ip a command will conveniently show the addresses assigned to your network interfaces, but oftentimes this is not what the internet sees your machine as. So how to find your public IP address from...
How can I remap buttons on my mouse, especially for more exotic ones like MMO mice?
How to get the number of lines in a file? I.e. for a file like this: Line one Line 2 Final line I would like to do something like this: $ count-lines /path/to/the/file/above 3
For reasons of my own, I have services on my LAN which use HTTPS and I create my own certificates for these. Over the years, the usage of TLS has evolved considerably. Many features that were once...
I want to connect to my university network via OpenVPN under Fedora GNOME. I imported the openvpn configuration provided by the university in the Network Manager GUI and specified the user certifi...
I've been learning some Linux and I finally feel like I can find my way around the command line. But now I hear people say there are other, "non-POSIX" kinds of shell, with different semantics. Wha...
In gpg(1), one normally adds recipients of an encrypted message with --recipient. Those recipients will be able to decrypt the message, and their key ID will appear unencrypted, so anyone will kno...
Motivating example: my Mint 20.3 distribution offers long-term support until April 2025, which matches the "standard support" offered for the upstream Ubuntu (20.04 "Jammy Jellyfish"). However, the...
I want to switch hard drives. How do I migrate my root FS from the drive it's on, to the new one, so that everything is exactly as it is?
How to convert a json file to yaml? Technically json is already valid yaml, but I'm talking about the characteristic easy-to-read yaml formatting with indentation and minimal quotes.
I have a systemd unit that does some stuff on the internet. Sometimes this gets fired at startup. I want to make sure it's delayed until the computer is connected to the internet. In my notes I fo...
I saw another post recommend using Fedora if you want cutting edge features. Is Fedora really a "cutting edge" distro? I am not very familiar with Fedora, I know it's a community counterpart to R...
The local port range on my Arch Linux installation is 32768-60999 according to cat /proc/sys/net/ipv4/ip_local_port_range Wikipedia states that this range is "used by many Linux kernels" and th...
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...
Problem I'd like to be able to decrease images, particularly jpg and png's, either to a percentage of the original file, or a specified size in bytes. MWE decrease --size=900KB -o image_small....
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...
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...
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...
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 ...
MWE startx && xrandr-invert-colors Problem It seems that anything after startx does not get issued in the resulting X session. I'd like to make a bash function that sets up my monito...
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...
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? ...
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...
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...
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...
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...
..$ 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...
Trying to understand what exactly <!nocheck> does next to a package in build-depends (for example, Perl). Debian Wiki says: Terms can be negated by using an exclamation mark as a prefix ...
I can easily run Windows games with wine by running: wine game.exe However, if I want to use Proton I have to run Steam, add the game as a non-Steam game, and run it that way. Since Proton is ...
With Debian 12, it seems that mysql-server is not available in the "default" package distribution and thus, cannot be installed with sudo apt install mysql-server or sudo apt-get... (I know that ma...
