TUI File Manager in Bash

https://preview.redd.it/ao14kf51nh1g1.png?width=1914&format=png&auto=webp&s=647a8623a329e0ac3f61e241b04c40f2736b43f2

Checkout this file manager i made in pure bash
Do give a star if you like it - https://github.com/Aarnya-Jain/bashfm

https://redd.it/1oy3chh
@r_bash

Accidentally created an emotional OS

\#!/usr/bin/env bash

\# feralChurchBasementOS.sh

\# emotional maintenance noscript for unstable human systems



set -euo pipefail



OS_NAME="feralChurchBasementOS"

VERSION="v1.0"



log() {

printf "[%s\] %s\\n" "$(date +'%Y-%m-%d %H:%M:%S')" "$*"

}



uninstall_shame() {

log "Purging inherited shame..."

\# placeholder for actual work

sleep 1

log "Shame removed from user-space (may respawn, monitor with journalctl)."

}



reboot_self_worth() {

log "Rebooting self-worth service..."

\# simulate stop/start

sleep 1

log "self-worth.service is now active (running)."

}



patch_trauma_kernel() {

log "Applying trauma kernel patches..."

\# pretend to apply updates

sleep 1

log "Kernel patched. Reboot recommended for changes to take full effect."

}



close_background_processes() {

log "Scanning for emotional background processes..."

\# pretend to kill runaway processes

sleep 1

log "Terminated: overthinking, catastrophizing, people-pleasing."

}



restrict_root_access() {

log "Hardening permissions on /home/heart..."

\# pretend to change ownership/permissions

sleep 1

log "Root access to feelings restricted. Sudo now requires consent."

}



run_health_check() {

log "Running post-maintenance health check..."

sleep 1

log "System status: degraded but functional (expected)."

}



main() {

log "Initializing ${OS_NAME} ${VERSION}..."



uninstall_shame

reboot_self_worth

patch_trauma_kernel

close_background_processes

restrict_root_access

run_health_check



log "Done. For ongoing maintenance, schedule via cron:"

log " 0 3 * * * ${PWD}/feralChurchBasementOS.sh >/var/log/basementOS.log 2>&1"

log "Manual override available with: sudo apt-get heal"

}



main "$@"

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

Script to re-assemble HTML email chopped up by fetchmail/procmail

I use "fetchmail" to pull down email via POP3, with "procmail" handling delivery, and "mutt" as my mailreader. Long lines in emails are split and wrapped. Sometimes I get a web page as an email for authentication. Usually the first 74 characters of each long line are as-is, followed by "=" followed by newline followed by the rest of the line. If the line is really long, it'll get chopped into multiple lines. Sometimes, it's 75-character-chunks of the line followed by "=".

I can re-assemble the original webpage-email manually with vim, but it's a long, painfull, error-prone process. I came up with the following noscript to do it for me. I call the noscript "em2html". It requires exactly 2 input parameters...
- the original raw email file name
- the desired output file name, to open with a web browser. The name should have a ".htm" or ".html" extension so that a web browser can open it.

Once you have the output file, open it locally with a web browser. I had originally intended to "echo" directly to the final output file, and edit in place with "ed", but "ed" is not included in my distro, and possibly yours. Therefore I use "mktemp" to create an interim scratch file. I have not yet developed an algorithm to remove email headers, without risking removing too much. Here's the noscript...

~~~
#!/bin/bash
if ${#} -ne 2 ; then
echo 'ERROR The noscript requires exactly 2 parameters, namely'
echo 'the input file name and the output file name. It is recommended'
echo 'that the output file name have a ".htm" or ".html" extension'
echo 'so that it is treated as an HTML file.'
exit
fi
tempfile="$(mktemp)"
while read
do
if "${REPLY: -1}" = "=" ; then
xlength=$(( ${#REPLY} - 1 ))
echo -n "${REPLY:0:${xlength}}" >> "${tempfile}"
else
echo "${REPLY}" >> "${tempfile}"
fi
done<"${1}"
sed "s/=09/\t/g
s/=3D/=/g" "${tempfile}" > "${2}"
rm -rf "${tempfile}"
~~~

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

New Project: “GeoBlocker” — US-only SSH Geo-fencing with nftables (feedback welcome!)



https://redd.it/1p05fuu
@r_bash

imgur album fetcher

I'll just leave this here:

for x in $(curl https://imgur.com/gallery/ultimate-4k-wallpaper-dump-2-cats-8Yxub | awk -F 'window.postDataJSON="' '{print $2}' | awk -F '"</noscript>' '{print $1}' | sed 's/\\//g' | jq '.media.[].url' | sed 's/"//g'); do timeout 5 curl "$x" > "${x##*/}"; done

https://redd.it/1p0nbii
@r_bash

New Project: “GeoBlocker” — US-only SSH Geo-fencing with nftables (feedback welcome!)

Hey everyone,

I’m pretty new to sharing code publicly, so please be gentle 😅 — but I’ve been working on something I think could be useful to others, and I’d love feedback from people far more experienced than me.

# 🔒 What is GeoBlocker?

GeoBlocker is a Bash-based tool for Ubuntu 24.04 servers that want to lock down SSH (port 22) to US IP ranges only, using fast-loading nftables sets and geo-IP lists from IPdeny.

Features:

Fetches US IPv4 + IPv6 ranges (with IPdeny usage-limits respected)
Bulk-loads them efficiently into nftables sets (avoiding slow “one CIDR at a time” loops)
Optional SSH whitelist (IPv4 + IPv6)
Investigation mode that shows:
nftables status
whitelist status
SSH client IP
privileges
missing sets or config issues
Backup + atomic write safety
Nothing applied automatically — you stay in control of `/etc/nftables.conf`

Repo is here:

👉 [https://github.com/baerrs/GeoBlocker](https://github.com/baerrs/GeoBlocker)

# 🛠️ Why I built it

I run a small personal server and kept seeing tons of SSH brute-force attempts from around the world.
Fail2ban helped, but I wanted a stronger approach: just block every non-US address before they even reach SSH.

I found a lot of half-solutions or outdated guides, so I wrote a noscript that:

is reproducible
uses best practices
keeps nftables clean
and is safe for beginners (backups, dry-run behavior, etc.)

# 🙋‍♂️ What I want feedback on

Since I’m new to publishing open-source noscripts:

Is the structure reasonable?
Any obvious improvements to safety, portability, or code style?
Is the README clear enough?
Any red flags for production usage?
Suggestions for features? (cron auto-update? IPv4/v6 country selection? Better logging?)

I’m totally open to constructive criticism — just keep in mind I’m still learning how to present and share code. ❤️

# Thanks in advance!

If anyone has ideas, corrections, or wants to help evolve the project, I’d really appreciate it.
And if even one person finds it useful, that’s a big win for me already.

Thanks! 🙏

— Scott (R. Scott Baer)

https://redd.it/1p11m9l
@r_bash

Built my own xdg-open alternative because the old one annoyed me — meet YAXO
https://github.com/yogeshdofficial/yaxo

https://redd.it/1p1f8ji
@r_bash

i am loosing my mind, help me with bash plz.....

[[ -f "$dotfiles_path/installer.sh" ]] && echo found
read -n 1 -s -r
if [ -f "$dotfiles_path/installer.sh" ]; then

ai: (gpt)

❗ read -n 1 -s -r breaks the [[ ... ]] test output
read -n 1 reads nothing (because Enter is a newline, not a character key),
leaving the newline in the buffer.
So the NEXT read or the control flow may get triggered early.
This results in:
skipped prompts
next input read incorrectly
if branches executing before expected
depending on where the leftover newline is consumed.

is that a thing really in bash noscripting. bro. i lost hours trying fixing this with gemini cli. finally got this from gpt.

i wrote that line to stop to read "found"
cause my program had tui staff so if i hadn't done that the output would vanish.

bro i am noscripting i have no time for that. after that many days coding with bash... finally this????

idk why but after commenting out the read line it works. how can i avoid unintentional situations like that. this interrupts my flow of work.

https://redd.it/1p1vzik
@r_bash

HELP ME

#!/bin/bash

# Decrypt function
function decrypt {
MzSaas7k=$(echo $hash | sed 's/988sn1/83unasa/g')
Mzns7293sk=$(echo $MzSaas7k | sed 's/4d298d/9999/g')
MzSaas7k=$(echo $Mzns7293sk | sed 's/3i8dqos82/873h4d/g')
Mzns7293sk=$(echo $MzSaas7k | sed 's/4n9Ls/20X/g')
MzSaas7k=$(echo $Mzns7293sk | sed 's/912oijs01/i7gg/g')
Mzns7293sk=$(echo $MzSaas7k | sed 's/k32jx0aa/n391s/g')
MzSaas7k=$(echo $Mzns7293sk | sed 's/nI72n/YzF1/g')
Mzns7293sk=$(echo $MzSaas7k | sed 's/82ns71n/2d49/g')
MzSaas7k=$(echo $Mzns7293sk | sed 's/JGcms1a/zIm12/g')
Mzns7293sk=$(echo $MzSaas7k | sed 's/MS9/4SIs/g')
MzSaas7k=$(echo $Mzns7293sk | sed 's/Ymxj00Ims/Uso18/g')
Mzns7293sk=$(echo $MzSaas7k | sed 's/sSi8Lm/Mit/g')
MzSaas7k=$(echo $Mzns7293sk | sed 's/9su2n/43n92ka/g')
Mzns7293sk=$(echo $MzSaas7k | sed 's/ggf3iunds/dn3i8/g')
MzSaas7k=$(echo $Mzns7293sk | sed 's/uBz/TT0K/g')

flag=$(echo $MzSaas7k | base64 -d | openssl enc -aes-128-cbc -a -d -salt -pass pass:$salt)
}

# Variables
var="9M"
salt=""
hash="VTJGc2RHVmtYMTl2ZnYyNTdUeERVRnBtQWVGNmFWWVUySG1wTXNmRi9rQT0K"

# Base64 Encoding Example:
# $ echo "Some Text" | base64

# <- For-Loop here

# Check if $salt is empty
if [ ! -z "$salt" ]
then
decrypt
echo $flag
else
exit 1
fi



Create a "For" loop that encodes the variable "var" 28 times in "base64". The number of characters in the 28th hash is the value that must be assigned to the "salt" variable.

I have tried every single line of code that i know and still didn't get the right answer

https://redd.it/1p1zx87
@r_bash

Concurrency and Strict Mode

I added a chapter about Bash and Concurrency in my small Bash Strict Mode Guide:

https://github.com/guettli/bash-strict-mode?tab=readme-ov-file#general-bash-hints-concurrency

Feedback is welcome:


## General Bash Hints: Concurrency

If you want to execute two tasks concurrently, you can do it like this:

# Bash Strict Mode: https://github.com/guettli/bash-strict-mode
trap 'echo -e "\n🤷 🚨 🔥 Warning: A command has failed. Exiting the noscript. Line was ($0:$LINENO): $(sed -n "${LINENO}p" "$0" 2>/dev/null || true) 🔥 🚨 🤷 "; exit 3' ERR
set -Eeuo pipefail

{
    echo task 1
    sleep 1
} & task1_pid=$!

{
    echo task 2
    sleep 2
} & task2_pid=$!

# Wait each PID on its own line so you get each child's exit status.
wait "$task1_pid"
wait "$task2_pid"

echo end

Why wait each PID separately?

- You must wait to reap background children and avoid zombies.
- wait pid1 pid2 will wait for both PIDs, but its exit status is the exit status of the last PID
waited for. This means an earlier background job can fail yet the combined wait can still return
success if the last job succeeds — not what you want if you need to detect failures reliably.



https://redd.it/1p20iz7
@r_bash

Forgot that I added this. Love past me!
https://redd.it/1p38uu0
@r_bash

How could I use Bash to automate processes on my Linux machine ?



https://redd.it/1p3ukzz
@r_bash

how do you manage your .bashrc and ,bashprofile

Hi


I'm looking at puppet and setting up standard alias and other things

I don't really want to take over \~/.bashrc or \~/.bash\profile



I was thinking maybe the way to do this was to add at the bottom

. (or source) \~/.bashrc-puppet

and

. (or source) \~/.bashrc-local


so that what files or other things can add / remove lines to \~/.bashrc puppet can manage the .bashrc-puppet and local mods can go into .bashrc-local

and the same for the bash_profile






https://redd.it/1p4e3yp
@r_bash

Crypto backup tool

It uses zip and gnupg.

**Features**:

* double encrypt: by zip and by gnupg
* generate hash'es from given password with 1000 iterations, it's prevent easy brute force
* once setup: just use symlinks in backup directory
* ready for cron: just use env variable
* simple for code review and modify

[https://github.com/LazyMiB/Crypto-Backup-Tool](https://github.com/LazyMiB/Crypto-Backup-Tool)

https://redd.it/1p4fjhj
@r_bash

Beginner-friendly Bash project: Real-time CPU Usage Monitor Script (with alerts + logs)

Sharing a small Bash automation project I built for practice. This noscript monitors CPU usage in real-time using top \+ awk, sends an alert when the CPU crosses a threshold, and logs usage automatically.

Step-by-step explanation: https://youtu.be/nVU1JIWGnmI
Complete source code at https://github.com/Abhilashchauhan1994/bash\_noscripts/blob/main/cpu\_usage.sh

https://redd.it/1p4nobz
@r_bash

ls in terminal - why so few new features?
https://redd.it/1p4xmmn
@r_bash

TunnelForge | CLI Based OpenVPN Wrapper with Multi-Config support

https://redd.it/1p3y7mz
@r_bash