Natural Language Processing in Bash
https://massimo-nazaria.github.io/nlp.html

https://redd.it/1c9j3eo
@r_bash

can you help me the issue with this noscript?

I have to create a new accounts_new.csv file based on accounts.csv file and modify like that.

was

2,1,Christina Gonzalez,Director,,
8,6,Bart charlow,Executive Director,,
9,7,Bart Charlow,Executive Director,,

# should become:

2,1,Christina ,
8,6,Bart Charlow,Executive ,
9,7,Bart Charlow,Executive ,Gonzalez,Director,cgonzalez@abc.comDirector,bcharlow6@abc.comDirector,bcharlow7@abc.com

here is the code:

#!/bin/bash

# Check if the correct number of arguments is provided
if "$#" -ne 1 ; then
    echo "Usage: $0 <pathtoaccounts.csv>"
    exit 1
fi

# Check if the input file exists
if ! -f "$1" ; then
    echo "File $1 not found!"
    exit 1
fi

# Function to process each line of the input file
processline() {
    IFS=',' read -r -a fields <<< "$1"
    id="${fields[0]}"
    name="${fields[2]}"
    position="${fields[3]}"
    locationid="${fields1}"

    # Format name: first letter uppercase, rest lowercase
    formattedname=$(echo "$name" | awk '{print toupper(substr($1,1,1)) tolower(substr($1,2)) " " toupper(substr($NF,1,1)) tolower(substr($NF,2))}')

    # Format email: lowercase first letter of name, full lowercase surname, followed by @abc.com
    formattedemail=$(echo "$name" | awk '{print tolower(substr($1,1,1)) tolower($NF)}')
    formattedemail+="@abc.com"

    # Append locationid to email if available
    if -n "$location_id" ; then
        # Check if the email already contains a number
        if [ "$formatted_email" =~ [0-9$ ]]; then
            formattedemail="${formattedemail%,}@abc.com"
        fi
        formattedemail="${formattedemail%,}${locationid}@abc.com"
    fi

    # Output the formatted line
    echo "${id},${fields[1]},${formattedname},${position},${formattedemail},"
}

# Process the header row and write it to accountsnew.csv
head -n 0 "$1" > accountsnew.csv

# Add a newline character to the end of the file if it's missing
sed -i -e '$a\' "$1"

# Process each line (excluding the header) of the input file and append to accountsnew.csv
while IFS= read -r line || -n "$line" ; do
    if -n "$line" ; then
        processline "$line"
    fi
done < "$1" >> accountsnew.csv

echo "Processing completed. Check accountsnew.csv for the updated accounts."

# Ensure the output file exists and is readable
if [ -f "accountsnew.csv" ]; then
    echo "File accountsnew.csv created successfully."
else
    echo "Error: Failed to create accountsnew.csv."
    exit 1
fi




the test case says that accounts_new.csv is not found in the directory

https://redd.it/1ca748j
@r_bash

My first bash noscript - Hide.me VPN Linux CLI Server Switcher

Hi guys n girl,


i wrote my first bash noscript because i had a neat usecase and wanted to try out bash for some time.

In my case i wanted to have a easier and more elegant way to switch my VPN Server. I use hide.me atm and they provide a CLI Client for that purpose, but its not the most userfriendly and comfortable implementation.

I am not a dev so dont throw rocks at me :-P


Github/hide.me-server-switch

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

Can I define something like '~' (tilda)

Is it possible to define '~~' (or some other symbol) to behave like '~' ?

For example define '~~' to be /host_fs/home/user and then it will be possible to do things like cd ~~/Downloads etc.


Motivation: inside a docker container i have /host_fs/ I want that '~~' be some path in it and users can type stuff like vim ~~/config.txt

https://redd.it/1cabhz0
@r_bash

Bashcord - Discord in bash (Not exactly discord)

https://github.com/gitipedras/bashcord

I don't know why I decided to make it.

Any Ideas on how to improve?
Not features that discord has.

Feedback PLS.

https://redd.it/1cbcbq5
@r_bash

How to override a specific autocomplete?

I used to be able to type unz and hit tab, bash would recognize that unzip was the only match, and it would complete it, and add a space after , and I could continue.

But now some additional commands that start with that start with unzip and its really annoying that I have to type it, and then manually add the space.

Is there a way to customize the completion to pretend that "unzip" is the only match (other than deleting the other commands?)

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

Print files whose line of text appear more than once across the files

I have several dozens of text files of a couple of thousands of lines each. I would like to find all the lines that appear more than once across all the files. For example:

# FileA.txt:

cat
dog
bird
horse

# FileB.txt:

elephant
bird
cat

# FileC.txt:

bird
raccoon
lizard
horse


Desired output would be something like:

cat
FileA.txt
FileB.txt

horse
FileA.txt
FileC.txt

bird
FileA.txt
FileB.txt
FileC.txt

Anyone know a performant way to do this? It's straightforward to do it between only 2 files but I have way more than that. Combine all the lines into one file, find duplicate lines in that file, then search for the files for these duplicate lines is the best approach?

https://redd.it/1cbnzf1
@r_bash

Changing keywords?

I want to recompile bash with adjustments to the keywords and names of certain built ins.

Ideally, I want them to be single characters. Has anyone done this? Are there any gotchas? My Google fu is failing.

I'm interested in compacting the syntax of one liners for the purpose of playing code golf. So I'm not worried about readability.

https://redd.it/1cbp3it
@r_bash

Send a program receiving piped input into a debugger (gdb)?

Hello. I have a small program.c that takes one line of text, evaluates the input, and then exits. To get the program to run successfully (return 0 and exit), I pipe some hex (non-printable ascii) characters to it. This causes the program to run and exit fine. What I'd like to do is step through this program.c once it's been fed the hex values, but before executing, using gdb.

So far I've tried every combination of piping, redirection and command substitution that I can think of, but it either hangs or the program finishes executing before gdb can open it.

I've also read in gdb's pages that it can open a program based on a pid, so I tried that with a split screen terminal, but apparently this little .c program doesn't create a pid, even when I open it and let it wait for input.

Some (failed/laughable) examples of what I've tried that hopefully show the logic of what I'd like to do:

gdb "$( (printf "some text"; printf "\xsomehex") | ./program.c )"

(printf "some text"; printf "\xsomehex") >>> ./program.c | gdb

(printf "some text"; printf "\xsomehex") | gdb ./program.c

x="$( (printf "some text"; printf "\xsomehex") )"; gdb program.c < $x

For what it's worth, I've already stepped through gdb and entered/replaced the strings manually in memory at the appropriate input points, but there's some extra behaviour that I'd like to investigate which only seems to happen when I pipe the text from the command line. So I'm hoping to catch a "snapshot" of the program in that state before it starts executing.

Happy to provide more details if that helps. Left off for brevity's sake.

Basically I'm asking this in r/bash because I'm wondering if this sequence is even possible, or if it's like trying to put on your socks after you've already laced up your shoes.

This is running in GNU bash, v5.1.16.

https://redd.it/1cbqif7
@r_bash

SoftView Script

Greetings to all,

I have crafted this modest noscript for everyone who spends considerable time working on computers and experiences eye fatigue. I hope you find it to your liking. Please feel free to modify or enhance it as you see fit.

#!/bin/bash

# Check dependencies
type xrandr &>/dev/null || { echo "xrandr is not installed"; exit 1; }
type rofi &>/dev/null || { echo "rofi is not installed"; exit 1; }
type redshift &>/dev/null || { echo "redshift is not installed"; exit 1; }

# Lists monitors and allows the user to choose one if there is more than one
monitors=$(xrandr --query | grep " connected" | cut -d" " -f1)
if [ "$(echo "$monitors" | wc -l)" -gt 1 ]; then
monitor=$(echo "$monitors" | rofi -dmenu -p "Select Monitor:" -config /usr/share/rofi/themes/Arc-Dark.rasi)
else
monitor=$monitors
fi

# Ensures that a monitor has been selected
test -n "$monitor" || { echo "No monitor selected, exiting."; exit 0; }

# Sets the monitor configuration options
list_options() {
echo "Reset : xrandr --output $monitor --set CTM '0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1' ; redshift -x"
echo "GrayScale : xrandr --output $monitor --set CTM '1431655765,0,1431655765,0,1431655765,0,1431655765,0,1431655765,0,1431655765,0,1431655765,0,1431655765,0,1431655765,0'"
echo "Brightness 0.5 : xrandr --output $monitor --brightness 0.5"
echo "RedShift 1 : redshift -oP -O 4500 -b 0.5"
echo "RedShift 2 : redshift -oP -O 3300 -b 0.7"
echo "RedShift 3 : redshift -oP -O 10000 -g .1:1:.1"
echo "RedShift 4 : redshift -oP -O 1000 -g 1:1.1:1"
}

# Show the list of options with rofi and execute the selection directly
selected_option=$(list_options | rofi -dmenu -p "Select configuration:" -config /usr/share/rofi/themes/Arc-Dark.rasi)

# Checks if an option has been selected
test -n "$selected_option" || { echo "No option selected, exiting."; exit 0; }

# Extracts only the command from the selected result
command=$(echo "$selected_option" | cut -d':' -f2- | xargs)

# Execute the selected command
if [ -n "$command" ]; then
bash -c "$command"
else
echo "Invalid command, exiting."
exit 1
fi



https://redd.it/1cbv3c5
@r_bash

How to bypass "exec &> logfile" and show echo messages on the screen

I do have a very old and long noscript that is spitting everything to the log file, but gives no output on the screen. This make a problem as noscript is running in the background and user think it hanged or crashed.

I would like to add some "milestone messages" when part of noscript is done and these messages would be shown on the screen for the user, but can't figure out how to make it.

recent example noscript:

#!/bin/bash

set -xeo pipefail
exec &> setup_noscript.log

echo "test message"

recent output on the screen:

`+ exec`

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

Build my first project in bash. Test it out please

&#x200B;

https://preview.redd.it/gjvu2vyiefwc1.png?width=2204&format=png&auto=webp&s=b85764d55d247c8f8533939a9ba55aa992e5ac57

github: https://github.com/suvanbanerjee/Keyboard-LED-Remapper

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

Question about basic telent session noscript.

Hello guys.

I want to gather the output from the cisco device by using 'show ip interface' every 30 seconds.

and I haven't finished yet but I faced unexpected behavior.

This is my noscript.

#!/bin/bash

# device
ip="192.168.192.138"
port="23"
pass="cisco"
duration=$((60 * 60)) # 1 hour
interval=30 # Check every 30 seconds

# Main
echo "Starting to gather 'show ip ali'"
start_time=$(date +%s)
end_time=$((start_time + duration))

while [ $(date +%s) -lt $end_time ]; do
echo "Gathering 'show version'..."
(
sleep 1
echo "$pass"
sleep 5
echo "show ip ali"
sleep 5
echo "exit"
) | telnet $ip $port
echo "Waiting for 30 seconds"
sleep $interval
done

Is there a way to maintain the telnet session without disconnecting and gather 'show ip ali' every 30 seconds?

With my noscript, every time telnet sessions disconnected after executing 'show ip ali' and then re-connect telnet session again.

Thank you!

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

tee is doing nothing. Details included in pastebin link.

https://pastebin.com/h9FkmCBs

https://redd.it/1cd4ypf
@r_bash

Doubt



Hi guys i am learning linux command line from the book "The Linux Command Line
Second Internet Edition
William E. Shotts, Jr".
I completed part1 in this book.
Part 1 – Learning The Shell starts our exploration of the basics of the
command line including such things as the structure of commands, file system
navigation, command line editing, and finding help and documentation for com-
mands.
I need to know what is bash programming and bash programming language?.
What's the difference between bash and other programming language.

As mentioned in part 1, the things I learned are actually bash programming or not?
Whether i learning bash programming without knowing it?


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

Quick select prompter utility

I wrote a utility noscript for choosing commands by pressing key key sequences. As it is interactive, the two gifs below are probably the best way to showcase the functionality. However I also wrote a short blog post about it, which also contain the actual noscript:

https://miropalmu.github.io/homepage/bash\_quick\_select\_prompter.html

Toy example usage \(key presses after enter are a, a, b\).

In the following, the noscript is wrapped to a infinite loop. It also showcases that the commands can be given denoscriptions by prefixing them with `<denoscription> #`.

while true; do
~/ps/noscripts/prompter.bash \
b "branches # git branch" \
t "status # git status" \
s "summary # git s" \
i "indexed/staged diff # git sd" \
u "ulog # git ul" \
l "log 5# git log -n 5" \
d "diff # git d" \
h "stash list # git hl"
echo
done

Git utility

https://redd.it/1cdi9bj
@r_bash

bash riddle

$ seq 100000 | { head -n 4; head -n 4; } 
1
2
3
4
499
3500
3501
3502

https://redd.it/1ce4725
@r_bash

Unable to understand the usage of jq while indexing

I am pretty much new to bash and learning to noscript well, I am learning how to use jq tool to parse a json file and access the elements of character by character.

https://pastebin.com/SfLFbJPE

In this effort, my code works fine I have the item to be "DOG"

and my for loop to have

for entry in $(echo "$json_data" | jq '.[\] | select(.[\] | contains("D"))'); do

where the key comes out to be 2 but when i access dynamically with ${item:$j:1} its not going to the for loop itself. Could someone help me understand this thing?

for entry in $(echo "$json_data" | jq '.[\] | select(.[\] | contains("${item:$j:1}"))'); do


https://redd.it/1ce7xo8
@r_bash

I want to read more about jq(preferred books)

Can you guide me some? I am till now not finding a book that contains at least 10 pages on jq.

https://redd.it/1ce8lim
@r_bash

what is the difference between absolute and relative path in the bash shell?

Hello, i'm trying to understand what the difference between a relative path and an absolute path is in the bash shell

i did a reddit search of r/bash and found this

https://www.reddit.com/r/bash/comments/4aam9w/can\_someone\_tell\_me\_the\_difference\_between/

but i'm not really understanding what they are talking about in the context of the bash shell

can anyone give me any examples of the difference between an absolute path and a relative path that i can actually use in my shell so i myself can get a handle on the concept?

thank you

https://redd.it/1cedn73
@r_bash

Benchmark "read -N" vs "head -c"
https://redd.it/1cest8z
@r_bash