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Wayland, ideally If you are on Wayland, the blessed way is to use the configuration for your desktop environment (DE) to map mouse keys and other input devices, except for a couple well-known opti...
Suppose I want to get random numbers from /dev/random with basic CLI tools. Is there a way to do it, that's easier to type and read than python -c 'import random; print(100 + 200*random.random())'?...
From the average user's perspective: Back in the day when people were figuring out how to do shells, there were as many shell syntaxes as shells. Everyone made up their own little language to go w...
When I create the initramfs, I sometimes see messages like: ==> WARNING: Possibly missing firmware for module: 'xhci_pci' I get many for different modules. What do they mean? Should I in...
When PSF says Python 3.8 is not supported, they are simply saying they will no longer bother fixing bugs in or adding stuff to that version. It's not like Python 3.8 will start automatically explod...
GPG stores keys inside an internal database of some sort. How to export your public key in the familiar -----BEGIN PGP PUBLIC KEY BLOCK----- format so that it can be imported to other software? E.g...
This is how to save it to a file: $ gpg --export --armor key-id > my-key.pub --armor stands for the format with printable characters.
With yq: $ yq --output-format yaml . file.json > file.yaml . is a filter which is applied to the data, but since . just stands for the document root, this means that the data is passed throu...
What security risks can be introduced this way, and how? Consider the following scenario: A legitimate server listens on some network port. Usually¹ no other process can listen on the por...
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...
Can I restrict myself from certain actions when I SSH in from outside a certain IP range? For instance no sudo? Maybe with ~/.ssh/authorized_keys having a from="!1.2.3.4/26" option with some kind ...
Surely there exists a command to print out the system's mother board model? Opening up the chassis is not an option.
Try reading the files in /sys/class/dmi/id/, some of them don't require root privileges. For example: board_name board_vendor
Every time I open EA Games from within Lutris, the desktop's UI/screen scaling is reset from 150% to 100%. This is in PopOS running with a 4K resolution on a 4K screen. The resolution is not change...
It seems as if it may not have been Lutris causing issues, but the HiDPI daemon in PopOS. This daemon can be disabled in the PopOS settings under "screens". Disabling that process may lead to issue...
I have created a set of profiles in OpenRGB that set the RGB lights on the fans and LED strips inside my desktop case. This works as expected, however, the activation of a profile does not persist ...
How do I read computer temperatures from my desktop in PopOS? Is there a terminal command, DE extension or GUI application that I can use for the purpose? The UEFI reports CPU, CPU case and motherb...
How do I control my computer's fan speeds, including the case fans, and the CPU pump and fan speed? Moving from Windows on an Acer laptop, I am used to Acer's PredatorSense application which lets ...
I don't think you can. AFAIK the fn key behaviour is implemented in hardware, the OS is not aware if a key has been pressed with or without fn key. You can check for a BIOS setting, but I've never...
It is true that Fn combinations are usually implemented in hardware, but in X11 (not Wayland of course!) you can circumvent this issue for most or all your keys.[1] For example, my F3 -> F3 and...
How to list tags of a container in container registry using CLI tools? Kinda like you would browse them visually in dockerhub.
Two things: First, if you create a second keyring, one not named login.keyring, it will not be automatically unlocked on login. Second, GNOME has a policy that they don't let users configure thin...
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 was looking through the unpacked file that I find in /proc/config.gz on the host system. There was: # CONFIG_USB_NET_DRIVERS is not set What I also found is that, the host side counterpart to t...
..$ 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...
