Is there a way to delete all files and reset via Bash?

I have a VPS that I can access only via ssh, is there a way to factory reset purely via ssh/bash? Thanks in advance!

https://redd.it/1heider
@r_bash

Looking for examples of optimized bash environments for Ansible, Python, Bash development

I'm a fan of utilizing Cygwin for my development and like the feel of running in a CLI vs utilizing something like vscode. I'd like to optimize by bash environment with functions, aliases, etc. I'm looking for examples of useful bash functions or nice bashrc files to optimize development of Python, Ansible (YAML), Bash noscripts, etc.

https://redd.it/1hfwnux
@r_bash

Stackabrix, a simple terminal game
https://redd.it/1hg79en
@r_bash

Globbing expansion within variable

I notice this simple noscript behaves differently in bash and zsh

#! /bin/zsh
while read lin
do
echo DEBUG line $lin
done << EOJ
foo * bar
EOJ

In zsh I get the expected output `DEBUG line foo * bar`, but with bash the asterisk is expanded to a list of the files in the current directory. It happens with standard input as well as with HERE documents.

What bash setting could be causing this double evaluation/expansion after assignment, and how do I get similar behavoir to zsh? I do not have any glob or expansion parameter settings in my `.bashrc` so it seems to be a difference with the default bash settings in Ubuntu.

I do not want input text to be interpreted or expanded in any way unless I explicitly use `eval` or `$()`as this is a security risk.

https://redd.it/1hg8crb
@r_bash

Reflow-safe right-aligned text in terminal via bash?

For styling my PS1, I create a a separator line using ANSI escape codes to create a string of $COLUMNS spaces which is underlined in gray. A simplified form of this would be

PROMPT_COMMAND='PS1=$(printf "\[\033[4;37m%${COLUMNS}s\033[0m\]" " ")"\n\s-\v$ "'

https://preview.redd.it/gdv4df0m3d7e1.png?width=901&format=png&auto=webp&s=1a0d6b7860356d7b2b31dba3a384f3b15fc0c42d

However, this messes up the display when the screen contents get reflowed, e.g. switching from a maximized to a half-screen window. Then I get something awkward like this:

https://preview.redd.it/5dj8l8zh4d7e1.png?width=565&format=png&auto=webp&s=87b998dff60c1bb61c172d2884a3a54f577478b2

https://preview.redd.it/ev36rx2n4d7e1.png?width=901&format=png&auto=webp&s=715dac21d32ac06ef29c5fdd600dd46c09764712

Is it possible to instead genuinely *right-align* a text on the terminal, such that it remains at the right end even if *$COLUMNS* changes? Or, alternatively, is there a way to insert a horizontal line that self-resizes like *<hr>* in HTML?

https://redd.it/1hg5ouj
@r_bash

Matches - A CLI game I coded in Bash

It's based on a two player game that was played in the trenches of World War One.

I made the game as an exercise in learning three new skills with Bash.

YouTube video showing the game being played: https://www.youtube.com/watch?v=24Wrz82JowA

Git Repo to download the game: https://git.zaks.web.za/thisiszeev/matches

Download it, try it out, give me feedback, something something something, profit.

https://redd.it/1hgq6r3
@r_bash

Two different while loops

Is there a functional difference between these two while loops:

find /path/ -type f -name "file.pdf" | while read -r file; do
echo $file
done


while read -r file; do
echo $file
done < <(find /path/ -type f -name "file.pdf")

https://redd.it/1hh3kpt
@r_bash

simple bash noscript/syntax help?

Hi there -

I'm looking for help with a fairly simple bash noscript/syntax. (If this isn't the right place, let me know!)

I am trying to write a noscript that will be run frequently (maybe every 10 minutes) in a short mode, but will run a different way (long mode) every 24 hours. (I can create a specific lock file in place so that it will exit if already running).

My thinking is that I can just...

* check for a timestamp file
* If doesn't exist, run **echo $(date) > tmpfile** and run the long mode(assuming this format is adequate)
* if it exists, then pull the date from tmpfile into a variable and if it's < t hours in the past, then run the short mode, otherwise, run it the long mode (and re-seed the tmpfile).

Concept is straightforward, but I just don't know the bash syntax for pulling a date (string) from a file, and doing a datediff in seconds from now, and branching accordingly.

Does anyone have any similar code snippets that could help?

https://redd.it/1hh2wfx
@r_bash

any way I can improve this bash noscript that has double stow command?

stow doesn't delete. It can only throw error or use --adopt to overwrite MY REPO's files instead of overwriting computer files with dotfiles.
I know normal ln can overwrite destination files like this:

ln -sf ~/.dotfiles/alacritty ~/.config/alacritty

but I want to use stow. Current config works decently well but I was wondering if I can replace 2 stow lines with 1?

# this code clones repo, runs install noscript, cd's into that repo, uses stow to distribute files via stow.

# I need to repeat stow twice. First so that if files exist already, those files overwrite
# this git repo files, then I reset this repo and run stow again.
# all this because git stow can't overwrite files / directories if they are already present

git clone --recurse-submodules git@github.com:monoira/.dotfiles.git ~/.dotfiles &&
  bash ~/.dotfiles/install_noscripts/_install.sh &&
  cd ~/.dotfiles &&
  stow -v --adopt alacritty cmus git nvim sqlfluff tmux zsh &&
  git add . && git reset --hard &&
  stow -v --adopt alacritty cmus git nvim sqlfluff tmux zsh

https://redd.it/1hh740o
@r_bash

Find files larger than X mb and promp to delete/skip each one found

Hi. I've asked Gemini, Copilot, Claude, etc. for a bash noscript to find files larger than X mb (this should be a parameter to the noscript) starting in the current path, recursively, and then read (prompt) a question to delete or skip each one found.

I've got this:

#!/bin/bash

if [ $# -ne 1 ]; then

echo "Usage: $0 <size_in_MB>"

exit 1

fi

size_in_mb=$1

find . -type f -size +"${size_in_mb}M" | while IFS= read -r file; do

# Get the file size

size=$(du -h "$file" | cut -f1)

echo "File: $file"

echo "Size: $size"

while true; do

read -p "Do you want to delete this file? (y/n): " choice

case "$choice" in

[Yy]* )

rm "$file"

echo "Deleted: $file"

break

;;

[Nn]* )

echo "Skipped: $file"

break

;;

* )

echo "Please answer y or n."

;;

esac

done

done

When executing "./findlargefiles.sh 50", I'm getting an infinite loop of
"Please answer y or n."

Any ideas? I'm trying it on an Ubuntu 22.04 server

Thanks

https://redd.it/1hhtp6g
@r_bash

Rate my Ubuntu debloater bash noscript

(I give you permission to steal it)

https://redd.it/1hhw6xe
@r_bash

tuiplette, a terminal match-three game (Bash)
https://www.reddit.com/gallery/1hhsh04

https://redd.it/1hi3fz8
@r_bash

Need help understanding and altering a noscript

Hello folks,

I am looking for some help on what this part of a noscript is doing but also alter it to spit out a different output.

p=system_profiler SPHardwareDataType | awk '/Serial/ {print $4}' | tr '[A-Z]' '[K-ZA-J]' | tr 0-9 4-90-3 | base64


This is a part of an Intune macOS noscript that creates a temp admin account and makes a password using the serial number of the device. The problem I am having is that newer macbooks don't contain numbers in their serial! This is conflicting with our password policy that requires a password have atleast 2 numbers and 1 non-alphanumeric.

I understand everything up to the tr and base64. From what I've gathered online, the tr is translating the range of characters, uppercase A to Z and numbers 0 to 9 but I can't get my head around what they're translating to (K-ZA-J and 4-90-3). After this I'm assuming base64 converts the whole thing again to something else.

Any help and suggestions on how to create some numerics out of a character serial would be greatly appreciated.

https://redd.it/1hiiopc
@r_bash

Executing a noscript from another noscript programmatically (regardless of run location)

I'm trying to build a simple noscript that will stop my docker containers, drop a volume, then start my containers back up. To start my containers, I have a helper noscript in the root of my project, compose.sh. The noscript I'm creating is in a subfolder, noscripts.

Is there a way to essentially do "if subfolder, go up a folder, then run noscript"? If I run the noscript from the root, it'd need to search the current location for the compose noscript. If run from elsewhere, it'd need to go up a level from the noscript's location to find the compose noscript.

I know I can hard code the noscript, but that's inflexible, as if the noscript is moved to another machine, it'd need to be modified. I don't know if my thinking of how to write this noscript is wrong, and would appreciate any feedback.

https://redd.it/1hhbaz2
@r_bash

Change terminal color programmatically?

Hello mates, I am using bash terminal. I can change my terminal color if an ssh session is opened. I wrote a function if "$SSH_CONNECTION" then the terminal color is changed. However, I want to do similar change for virtualenv, nothing happens. I print "$VIRTUAL_ENV" and it's null. What should I do?

https://redd.it/1hj8oof
@r_bash

Why variable is not updated in the function called in a while loop?

```
readonly BATTERY_CRITICAL_THRESHOLD=15
readonly REFRESH_INTERVAL=1

readonly BAT_PATH="/sys/class/power_supply/BAT0/capacity"

BATTERY_ALERT_STATE=0

get_battery_status() {
local battery_pct ac_state icon
battery_pct=$(<"$BAT_PATH")
ac_state=$(<"$AC_PATH")

if ((battery_pct <= BATTERY_CRITICAL_THRESHOLD)) && ((BATTERY_ALERT_STATE == 0)); then
BATTERY_ALERT_STATE=1
notify-send "Battery Critical" "Battery level is at $battery_pct%"
elif ((battery_pct > BATTERY_CRITICAL_THRESHOLD)) && ((BATTERY_ALERT_STATE == 1)); then
BATTERY_ALERT_STATE=0
fi
printf '%s%%' "$battery_pct"
}

# Main loop in main shell context
while true; do
get_battery_status
sleep "$REFRESH_INTERVAL"
done
```

Above is a bash noscript I write.

What I expect is it will change `BATTERY_ALERT_STATE` to 1 when battery level is lower than 15, and then send a notification. After `BATTERY_ALERT_STATE` is changed to 1, it won't be changed until the battery_pct is greater than `BATTERY_CRITICAL_THRESHOLD`.

But, in practice, it's not the case, it seems that `BATTERY_ALERT_STATE` has never been changed, and therefore the notification is continueously being sent.

I don't know why, I have debugged it for days, searched online and asked ai, no result.

Can anyone told me why?

https://redd.it/1hjbl7t
@r_bash

XDG & ~/.bashrc

I created a file to be sourced by bashrc to organize directories and files after running xdg-ninja.
I'm just not sure it's fool proof. I was hoping that a more experienced user could comment.
This is a shortened version with only one example. (cargo)

\#! /usr/bin/env dash



\# shellcheck shell=dash

\# shellcheck enable=all



\#------------------------------------------------------------------------------|

\# xdg-ninja

\#------------------------------------------------------------------------------|

alias 'xdg-ninja'='xdg-ninja --skip-ok --skip-unsupported' ;



\#------------------------------------------------------------------------------|

\# XDG Base Directory specification:

\#------------------------------------------------------------------------------|

export XDG_CACHE_HOME="${HOME}/.cache" ;

export XDG_CONFIG_HOME="${HOME}/.config" ;

export XDG_DATA_HOME="${HOME}/.local/share" ;

export XDG_STATE_HOME="${HOME}/.local/state" ;



\#------------------------------------------------------------------------------|

\# xdgmv

\#------------------------------------------------------------------------------|

xdgmv () {

test "${#}" -ne '2' && return ; test -e "${1}" || return ;

if test -d "${2%/*}" ;

then

mv --backup='numbered' --force "${1}" "${2}" ;

else

mkdir -p "${2%/*}" &&

mv --backup='numbered' --force "${1}" "${2}" ;

fi ;

} ;



\#------------------------------------------------------------------------------|

\# [cargo\]: "${HOME}/.cargo"

\#------------------------------------------------------------------------------|

xdgmv "${HOME}/.cargo" "${XDG_DATA_HOME}/cargo" &&

export CARGO_HOME="${XDG_DATA_HOME}/cargo" ;



\#------------------------------------------------------------------------------|

\# unset function(s)

\#------------------------------------------------------------------------------|

unset xdgmv ;



\#------------------------------------------------------------------------------|



https://redd.it/1hjybbv
@r_bash

friends I am looking for this but if you know bash manager types similar to this, can you share it?

https://redd.it/1hk3jpb
@r_bash