Making an alias disregard other aliases

I'm trying to rebind some dangerous commands. I keep accidentally invoking dd in the terminal, so I had the idea of aliasing "dd" to an error message, and another alias like "disk-destroyer" to the actual dd utility into. So I did this:

​

alias disk-destroyer='dd'

alias dd="echo 'Probably the wrong command. Use alias \"disk-destroyer\" for the actual dd command.'"

​

The problem here is that "disk-destroyer" will link back to the dd alias. Is there any way around it?

https://redd.it/ysng2m
@r_bash

Why won’t this bash noscript work?

#! bin/bash #

Printing System Variables #Print Bash shell name

echo $BASH # Print Bash shell Version

echo $BASH_VERSION # Print Home directory name

echo $HOME *

https://redd.it/ysppjw
@r_bash

How can I loop through all files with file extension within a certain set of extensions?

I want to loop through all files ending in `.mp3` or `.mp4`.

I know that I can do

for f in *.{mp3,mp4}; do

However if there happen to be no mp3 files, f will also assume the value `*.mp3` which is unwanted.

​

If I only want to consider one file extension, I know that I can do

for f in *.mp3; do
[ -f "$f" ] || break

But this does not easily apply to more file extensions.

Thank you for your help!

https://redd.it/ysoiea
@r_bash

Cluster; After the job finishes ,How to initiate file transfer? WinSCP

The cluster I am working with sends emails after finishing a job.

How can I monitor email to initiate the file transfer may be it with WinSCP or through a shell noscript?

Actually, I need to have a large number of plots and calculations to be made on the go; how can I do that?

https://redd.it/ysofcb
@r_bash

Curl request

I have a textfile which i would like to send to my telegrambot. The issue iam facing is that the textfile does not get sorted correctly when i post it through the curl request.

But when i run it in terminal it sorts nicely without any issues.

curl -s --data text="$(cat '/files/test.txt')" --data-urlencode "chat_id=@chatid123" 'https://api.telegram.org/botmyapikey/sendMessage'

This below is the format i want. I've read about word splitting but the quotes around the cat command does not seem to make a difference.

eurusd 1621
gbpusd 1539
eurcad 1332
gbpcad 1116
nzdusd 1054
nzdcad 928
audcad 867
eurgbp 324
xauusd 133
euraud -25
audnzd -128
eurnzd -213
gbpaud -484
gbpnzd -753
usdcad -804
eurchf -840
eurjpy -856
btcusd -1186
gbpjpy -1480
cadjpy -1604
xaujpy -2432
usdjpy -3058

Help is appreciated

https://redd.it/yt5sry
@r_bash

Need help with noscript- new to bash noscripting

https://redd.it/ytc1lu
@r_bash

How to delete empty lines in multiple files?

I tried this but it didn't worked:

sed -i '/^$/d' *.txt

I want to be able to delete empty lines in files in subdirectories as well.

https://redd.it/ythb7w
@r_bash

A way to run a noscript called XYZ.sh and the output will be in a file called XYX.out

I was asked to write a noscript that a user could run and the output would be easy for them to copy.

Although this is not what the noscript did it is an example where if you run a noscript called "AScript.sh" the user will see the output and have a noscript called "AScript.out" after.
I hope someone finds the idea useful.

#!/usr/bin/env bash               
                                  
# Get the noscript name             
Me="${0##*/}"                     
                                  
( (                               
                                  
    # do a read from the df command
    while read -r MountPoint Type; do
                                  
        # print out a command     
        echo "${MountPoint} uses filesystem type ${Type}"
        sleep 2                   
                                  
        # From inside the first loop do something withn the mount point
        while read -r FoundFile; do
                                  
            #  Print out a message
            echo "I have found your file \"${FoundFile}\" in filesystem \"${MountPoint}\""
                                  
        done< <(find "${MountPoint}" -xdev -type f -iname "*[a-c].mp4" 2> /dev/null)
                                  
    # run a df and pass it to read 
    done< <(df -PTh -txfs -text{3,4} | awk '!/ilesystem/ { print $7 " " $2}')
                                  
) 2>&1 ) | tee "${Me/%sh/out}" 

https://redd.it/ytm2ud
@r_bash

Bash noscript to rename files excluding names in an array

I currenlty have a noscript where I rename files by removing whitespace and certain names.

prename -v 's/ /_/g' *

prename -v 's/_-_/_/g' *

prename -v 's/_\(Summer-HD\)//ig' *

prename -v 's/_\(Hammer\)//ig' *

prename -v 's/_\(Hardware-Hybrid\)//g' *

prename -v 's/_\(digital\)//ig' *

prename -v 's/_\(Resolution-SD\)//ig' *

What I have tried is a for loop and place name in an array but that has not worked.


exclude=('(Summer-HD)' '(Hammer)' '(digital)' '(Resolution-SD)' '(Vacation)' '(Hammer-Hybrid)')

for x in "${exclude[@]}";
do prename -v 's/$x/_/g' * {} \;
done

This for loop does not work at all, and I'm not sure if I can pass a variable to prename. I would like to put the names in an array since I currently have more than 200 that i would like to remove. This list will grow as I restore these files from old backups.

https://redd.it/ytqnsb
@r_bash

ASCII Pendulum written in BASH noscript

I am so excited to share my BASH ASCII graphics library.
Been working on it for a while and its finally working.
I made a ASCII pendulum using it.

I've named the library - baSHed2D

Tbh the whole logic of pendulum was copied from coding train YouTube channel's p5.js pendulum video😅

Here's the Demo Video

YouTube link

Ans here's the code

GitHub link

Please review my code and suggestions are welcomed and I actually need some suggestions to improve this.

What you can do using baSHed2D

Draw lines,

Draw circles,

Draw rectangle,

Move these shapes


I will add mouse location getters too.

And a huge thanks to you guys, i had some issues regarding my code and I posted it here. It was for the line drawing algorithm, you guys are great. I learnt so much from your advices.

https://redd.it/ytriej
@r_bash

what are you guys toughts on this, and how can i fixed?
https://redd.it/ytujy2
@r_bash

Correct way to insert text in columns

I have this Columns in a text file.

Lets say i would like to add a column to Countries or Numbers or Cities.

What would be the correct way to do this?

I've tried this, to insert in the second column.

printf '%-20s' 'Stockholm' | paste -d "\\t" /file.txt -

Numbers Cities Countries
232323 blahblah waeawewae
232323 blahdadad waeawewaew
123123 asdsadads waewaewaea
123123 asdasdasd waeaweawea

​

https://redd.it/ytw075
@r_bash

Running bash noscript from outside Terminal, won't pick up second flag ¯\_(ツ)_/¯

Hi,
I'm running a noscript from Lingon X, a scheduler on macos. It generally works but ignores the *--cuesheet* flag. Can anyone see why?

Lingon X uses this command:

/bin/bash -li /Users/goggle-moggle/iplayer.sh

The iplayer.sh noscript looks like this:

#!/bin/bash

shopt -s expand_aliases

alias gip='get_iplayer --file-prefix="<name> - <episode> <pid> <version>" --pid '

gip m000b075 --pid-recursive --cuesheet
gip b09ymqm4 --pid-recursive --cuesheet


The noscript works as expected when I run from Terminal.
Thanks!

https://redd.it/ytwsi0
@r_bash

Round robin algorithm in bash noscript

Hi everyone. So I just started learning bash noscript a few weeks ago. I got an assignment and I have no idea how to do this. I kinda wrote in C# but I dont know how to write in bash. Can anyone help? below is the prompt

Provide a detailed specification, and design of the bash noscript that will emulate the behaviour of the round robin scheduling algorithm

https://redd.it/ytyxak
@r_bash

A bit of old hummer from rec.humor.funny Usenet group
https://redd.it/yu8o01
@r_bash

Check if executable has a live process

How to write a bash noscript which checks periodically specific executable has a live process. Say call it as ./check executable_name

https://redd.it/yu8xvc
@r_bash

How to show the directory in prompt only in the current line?
https://redd.it/yue4so
@r_bash

Scripting Issue - new to noscripting

I'm trying to create a noscript that uses one argument, and only one argument. This argument specifies the number of minutes to count down. It should start with the number of minutes, then count down second by second writing the text "there are x seconds remaining". When there is no time left the noscript should echo "time is over" and then quit.


So far I have this:

!#/bin/bash

for (( COUNTER=$1; COUNTER>0; COUNTER-- )); do sleep 1

echo "there are $COUNTER seconds remaining"

done

echo "time is over"

exit 0

&#x200B;

&#x200B;

This noscript counts down by the second if I run "bash noscript 5" it will count down 5 seconds, but I need it to count down 5 minutes, second by second when I do that. Appreciate all help

https://redd.it/yueqeh
@r_bash