r/bash

Hey everyone. I have been using linux mint since a year and loved it. It just works without manual tinkering. But now, captivated by the tiling managers, i jumped to Cachy hyprland. It's interesting but doesn't have many basic functionalities like alerting user about Caps lock key status through sound. I took help of ai but it somehow spikes my cpu usage and i have to reboot to make it normal again. Here is the Script :

#!/bin/bash

# Target the specific caps lock directory (adjust if you have a specific one like input3::capslock)

LED_PATH=$(ls -d /sys/class/leds/*::capslock | head -n 1)

# Fallback paths for the sounds

SOUND_ON="/usr/share/sounds/freedesktop/stereo/dialog-information.oga"

SOUND_OFF="/usr/share/sounds/freedesktop/stereo/dialog-warning.oga"

# Read initial state

last_state=$(cat "$LED_PATH/brightness")

while true; do

# Instant raw read of the file system

current_state=$(cat "$LED_PATH/brightness")

if [ "$current_state" != "$last_state" ]; then

if [ "$current_state" -eq 1 ]; then

# Using pw-play or paplay with low-latency flags

pw-play "$SOUND_ON" &

else

pw-play "$SOUND_OFF" &

fi

last_state=$current_state

fi

# 20ms polling rate (0.02s) gives instant human response time

# without hurting CPU performance

sleep 0.02

done

Can you guys please help me out.

Hi I usually do large backups that take time and need a notification system that notify me when is done.

Ideally I would like a notification on my phone but any alternative is ok.

Should I set up an email or there is something that is less painful?

I'm not good at this. I've been banging my head against a wall for two nights and this tiny, simple script is not working. My goal is to copy a download and paste it to a different folder, leaving the original

#!/bin/bash

source_d="~/data/downloads/data/downloads"

destination_d="~/data/library/ingest"

inotifywait -m -r -e close_write "$source_d" |

while read -r path; do

cp -r "$path" "$destination_d"

done

I've made it as far as having the watch initiated in from the source directory, but it doesn't move anything. Please help, and if it makes you feel good you can call me an idiot.

Hi all, I've only been using Linux and bash for less than a year now and was wondering if i could get some feedback on a code i just finished. The script is for a rotary knob on my keyboard, that doesn't get much use. I really wanted it to be used for volume control but, the control it gave me out the box only controlled the main volume. So i made a script that gave me finer control over all active applications with the center button on the rotary knob cycling the apps and turning the knob adjusting the volume. Thanks

https://github.com/Thothermese/VolumeMixer

AFAIK in file managers in Windows/Linux, they have the same convenient behavior where if you copy one folder into another folder of the same name and there's a conflict (e.g. a folder of the same name already exists), instead of aborting, it prompts to "overwrite" (merge the contents of the folder), recursively. If any of the files result in conflict (e.g. a file of the same name already exists), it prompts the user whether they want to overwrite, letting the user know which is larger and which is newer.

The above is useful if e.g. you abort the copy/move progress half and then want to resume at a later point.

---

Does anyone have a similar script they can share? How would such a script be implemented? I know rsync can do something similar. With these file managers, they seem to update one file at a time, e.g. when a file is successfully moved during the process, the source file is removed. With rsync, a file gets removed after rsync finishes(?) which is not as intuitive because it does not reflect the latest state of the progress.

Implementation-wise, is it as simple as rsyncing each file one at a time, checking for potential overwrites before rsync and comparing the file size and modification time of files ith stat, then prompting the user if there are conflicts, else rsync that file? Is there a way to do this more efficiently (or ideas for a better UX)? Can rsync or similar tools handle more of this?

Any tips are much appreciated.

Hi, I'd like to use that cmd xset for try to get xset -s NOW...
Could I set from terminal this cmd for put blank screen now
and then when I come back I move my finger in touchpad or press any key and OS wake up again...

Thank you and Regards!

Not sure if this is old news to everyone but I use this all day so figured I'd share. I got sick of typing cd really/long/nested/path/to/thing so I "made" this:

#fuzzy cd into any subdirectory
fcd() {
    local dir
    dir=$(find "${1:-.}" -type d 2>/dev/null | fzf) && cd "$dir" || return
}

Drop it in your .bashrc, open a new shell, and just run fcd. It lists every folder under where you are, you start typing, hit enter, and you're in it. You can also give it a starting point like fcd ~/projects if you don't want to scan from the current dir.

Curious if anyone has a slicker version. I'm sure there's a way to make it faster on huge trees.

I am trying to install artix with Root on one Drive and Home on another Drive

it will be formatted as ext4 of course and use awesome window manager and fastcompmgr

I am wanting to know if this is going to break my install or anything, if something is redundant, etc..

We all love the terminal for its speed, its power, and that raw, unfiltered command-line efficiency. It is where real work gets done.

But even the most hardened command-line veteran needs to blow off some steam.

Back in the day, we had simple ASCII games and hidden Easter eggs tucked away in the system files. Modern Linux keeps that tradition alive, and the repositories are packed with brilliant, useless, and thoroughly entertaining tools designed to turn your terminal into a playground.

Here is the BASH Warriors entertainment list...

--- BASH WARRIOR ENTERTAINMENT LIST ---

Command: Description: Download:

sl (Steam Locomotive): If you type ls wrong, a train chugs across your screen. (sudo apt install sl)

cmatrix: Turns your terminal into the falling code from The Matrix. (sudo apt install cmatrix)

fortune: Prints a random, often funny, quote or message. (sudo apt install fortune-mod)

cowsay: An ASCII art cow that speaks whatever text you give it. (sudo apt install cowsay)

aafire: Renders a realistic fire animation using ASCII characters. (sudo apt install libaa-bin)

xeyes: A pair of eyes that follows your mouse cursor around the screen (requires X11). (sudo apt install x11-apps)

bastet: A bastardized version of Tetris where the game intentionally gives you the worst possible piece. (sudo apt install bastet)

robotfindskitten: A Zen simulation where you navigate a robot to find a kitten among hundreds of random objects. (sudo apt install robotfindskitten)

moon-buggy: Drive a moon buggy over craters in this side-scrolling game. (sudo apt install moon-buggy)

fortune bofh-excuses: Generates corporate excuses for why you are late for work. (sudo apt install fortune-mod fortunes-bofh)

figlet: Creates large, stylized ASCII art banners from your text. Example: figlet "Hello World" (sudo apt install figlet)

telnet towel.blinkenlights.nl You can still watch Star Wars Episode IV entirely in ASCII art via Telnet. (sudo apt install telnet)

apt moo: The package manager has a secret. Run apt moo to see a cow. (No download required)

fortune | cowsay | lolcat: Get a rainbow-colored cow giving you random life advice. (sudo apt install fortune-mod cowsay lolcat)

Asciiquarium is an aquarium/sea animation in ASCII art. (https://github.com/cmatsuoka/asciiquarium)

--- Combo Funpack Download ---

sudo apt update && sudo apt install -y sl cmatrix fortune-mod cowsay libaa-bin x11-apps bastet robotfindskitten moon-buggy fortunes-bofh figlet telnet lolcat

==========================================================

Paste the following at the end of your .bashrc file that is located in your home directory. Customize to your heart's content...

# --- BASH WARRIOR Aliases (APT Package Management) ---

alias refresh='sudo apt update && sudo apt upgrade && sudo apt autoremove'

alias apt2='sudo apt update && sudo apt install'

alias update='sudo apt update'

alias upgrade='sudo apt upgrade'

alias fullup='sudo apt full-upgrade'

alias install='sudo apt install'

alias remove='sudo apt remove'

alias purge='sudo apt purge'

alias cleanup='sudo apt autoremove'

alias searchpkg='apt search'

alias info='apt show'

alias listup='apt list --upgradable'

# --- Enhanced System Calls ---

alias top='htop'

alias port='ss -tulpn'

alias myip='curl -s ifconfig.me'

alias dns='cat /etc/resolv.conf'

alias reboot='sudo reboot'

alias shutdown='sudo shutdown now'

For my DOS Warrior Alias List please goto: https://www.reddit.com/r/pop_os/comments/1u7e7ex/calling_all_dos_warriors/

If you could restart your shell scripting journey with your current knowledge, what would you do differently in the first 30 days — and what common mistakes would you tell your past self to avoid?

Hi everyone,

I have a script that works fine on Linux with Bash 4.x+, where I use read -e -i to prefill existing values and allow the user to edit them:

case "$vals" in

b|B) echo -ne " ${CYAN}Bsl${RESET}: " read -e -i "$bsl" -r bsl ;;

t|T) echo -ne " ${CYAN}Term${RESET}: " read -e -i "$term" -r term ;;

s|S) echo -ne " ${CYAN}Site${RESET}: " read -e -i "$site" -r site ;;

c|C) echo -ne " ${CYAN}Capt${RESET}: " read -e -i "$capt" -r capt ;;

esac

However, on macOS (which ships with Bash 3.2), I get:

read: -i invalid option read: usage: read [-ers] [-u fd] [-t timeout] [-p prompt] [-a array] [-n nchars] [-d delim] [name ...]

From what I understand, the -i option was introduced in Bash 4+.

Is there any portable workaround or alternative way to present a default/prefilled value to the user in Bash 3.2 while still allowing them to edit it interactively?

I'd appreciate any suggestions or examples that work on both Linux and macOS.

Thanks!

We were discussing ways to use Grep at work today and I came up with this...

grep -R ^"My Car Keys"$ /home/

If only life was that easy... But I'm still going to put it on a t-shirt.