Split full path and filename into path and filename.

I am currently doing this using a for loop. There must be an easier way.


fullpathfile="/path/to/where/file/is/stored.txt"

I want path="/path/to/where/file/is/" and file="stored.txt"

https://redd.it/12rt67y
@r_bash

Why is it that a command run from the terminal command line produces line break but the same command run within bash noscript has no line break/

If I run the following commands

lsblk > junk2.txt

cat junk2.txt

I see output with line breaks in the output like

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS

loop0 7:0 0 285M 1 loop /snap/atom/282

loop1 7:1 0 284.9M 1 loop /snap/atom/286

loop2 7:2 0 4K 1 loop /snap/bare/5

​

But if I put assign the output of that command to a noscript variable and then echo that variable

temp1=$(lsblk)
echo $temp1
My output has no line breaks

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS loop0 7:0 0 285M 1 loop /snap/atom/282 loop1 7:1 0 284.9M 1 loop /snap/atom/286 loop2 7:2 0 4K 1 loop /snap/bare/5

So why do I get line breaks with the first approach but not the second? Is the difference explained by different behaviors between cat vs. echo?

Thanks very much.

https://redd.it/12rzx3b
@r_bash

Storing a directory path as a variable, then passing it on to the 'ln -s' (symbolic link) command?

I stored directory in a variable:
var=$"'/media/disk2/video/001.mp4'"

I confirmed the directory was stored with the echo command:
echo $var
The directory is displayed with the quotation marks as desired.

I then tried to pass it on to ln -s:
ln -s $var 001_link.mp4

I get the error message:
ln: target '001_link.mp4': No such file or directory

https://redd.it/12s6aze
@r_bash

Intro to Bash noscripting for scraping and automation
https://www.trickster.dev/post/intro-to-bash-noscripting-for-scraping-and-automation/

https://redd.it/12sutav
@r_bash

DISCUSSION What if BASH could be used as a web server interpreter?

I've been BASHing for about 2 years now... it's changed my life.


The other day I was writing some code in PHP and it dawned on me, can I not find a way to run BASH as a web server interpreter?


Already I am managing SQL databases with BASH? I have used it to generate static HTML pages at regular time intervals. I have even used it to generate SVG and convert them into PDF files. It would be so nice to be able to make an index.sh rather than index.php... and I haven't yet found a problem I couldn't solve with BASH, except this?


Would like to get a discussion going and see what other people's views are, solely as a thought experiment. Would such an interpreter be practical and useful, or would it just be another dev tool in an ocean of dev tools?


No flaming please, I just want to have a righteous discussion/debate about if this sort of thing did exist now and how it would affect us as BASHers and/or the industry as a whole.

https://redd.it/12t6nnr
@r_bash

Aggregate multiple lines

I have a file that looks like this -

a 6509568
a 8011776
a 8011776
a 8011776
a 8011776
b 1112800
b 1369600
b 1369600

How do I make it look like -

a 38556672
b 3852000

https://redd.it/12t9df7
@r_bash

kube-dialog update

Hi, I've just updated kube-dialog with a filter command, you can filter namespaces and objects(pods,jobs...) with ease now, enjoy)

https://preview.redd.it/d8zv5c0jp3va1.png?width=742&format=png&auto=webp&v=enabled&s=7da1fc340ca5be8cfd2bf0ac3a709b435c3b0bc9

https://redd.it/12teich
@r_bash

Pure bash password generator

I wrote something like this but *waay* too complicated a few months ago. I fully realize it's not up to CISA standards, but I needed a way to auto generate dev Mysql passwords inside containers on startup.

genpw(){
declare -i limit="$1"
declare pw=''
_instr(){
declare -r str="$1"
declare -i sl=${#str}
declare -r chr="${2:0:1}"
declare -i ndx=$((RANDOM % ${sl}))
echo "${str:0:ndx}${chr}${str:$((ndx+1)):$((sl-ndx))}"
}
while [[ ${#pw} -le $limit ]]
do
if [[ $((RANDOM % 2)) -eq 0 ]]; then
# lc ascii
pw="$pw"$(printf "\x$(printf %x $((97+(RANDOM % 26))))")
elif [[ $((RANDOM % 2)) -eq 0 ]]; then
# uc ascii
pw="$pw"$(printf "\x$(printf %x $((65+(RANDOM % 26))))")
elif [[ $((RANDOM % 2)) -eq 0 ]]; then
# digits
pw="$pw"$((RANDOM % 10))
fi
done
declare c
# often mandatory non alpha characters
for c in '#' '@' '%'
do
pw="$(_instr ${pw:0:$limit} $c)"
done
echo "$pw"
unset -f _instr
} # genpw()

ahare@box:~/wk$ genpw 30
lQki068h@kUqa#8ewbtqw%t8eZkGcN
ahare@box:~/wk$ genpw 40
zwxNg7xl5Fz%EJBzajXdAn2dPTh#kdcJp@gk3fgM

https://redd.it/12trtg2
@r_bash

Can anyone PLEASE help with this noscript!

When run it says : versions found then SELECT not found and Syntax error: "do" unexpected.

Can you help solve this (probable really simple error)?

​

\#!/bin/bash

\# Get the name of the song from the user

read -p "Enter the name of the song: " song_name

\# Use find to search for all versions of the song in the Music folder

song_paths=$(find /home/Music -name "$song_name*")

​

\# Print out a numbered list of the song versions and ask the user which one they want to play

echo "Versions of '$song_name' found:"

select song_path in $song_paths;

do

if [ ! -n "$song_path" \]; then

break

fi

done

\# Play the selected song using the default music player on the system

xdg-open "$song_path"

exit

https://redd.it/12txs4b
@r_bash

Help/Direction creating a commandline AI?

I understand that their is a tool out there currently by the name of CLAI, however I'm wondering if it would be possible (as an independent project) to build/design a better command line artifical intelligence similar to the CLAI bot that is currently available. If so what reading materials should I start with? Is it possible to leverage "zsh"/"bash" and other cli tools with python AI systems.

https://redd.it/12uhaak
@r_bash

getting used and free disk space before and after rsync/trash noscript

Hi. Iconsider the following noscript:

if mountpoint -q /media/external; then
printf "Disk space before:\n"
# <usedGB>/<totalGB> Free: <freeGB>
rsync -avzP --ignore-existing --update --delete --modify-window=2 --stats --human-readable --delete --exclude={'*.db','*.tmp','recycle/'} /sambashare/ /media/external

find /sambashare/recycle -mtime +$30 -delete +
printf "Disk space after:\n"
# <usedGB>/<totalGB> Free: <freeGB>
else
exit 1
fi

the challenging part is, getting the disk space right (for me). tried.

df -ht ext4

but it outputs something like this

ilesystem Size Used Avail Use% Mounted on
/dev/nvmexxxx 21G 6.8G 13G 35% /
/dev/nvmexxxx 8.4G 2.3G 5.7G 28% /home

Can you point me to the right path ?

also, can it be done more efficiently what I am trying to achieve ? Thanks

https://redd.it/12upmle
@r_bash

Parse XML from a larger non-XML string in BASH

Hello people, I'm using a Calibre utility to fetch e-book metadata (via a BASH noscript):

$ fetch-ebook-metadata --isbn="9780791085455" --opf

The utility works by trying several resources, it returns errors as well as the metadata in XML format,

see output:

Failed to get cached URL from google for URL: https://www.amazon.com/Peyote-Mescaline-Drugs-Straight-Facts/dp/0791085457 with error: HTTP Error 429: Too Many Requests
Failed to get cached URL from google for URL: https://www.amazon.com/Nanny-Lana-Ferguson-ebook/dp/B0B6B41KFP with error: HTTP Error 429: Too Many Requests
Failed to get cached URL from google for URL: https://www.amazon.com/Basic-Geriatric-Nursing-Patricia-Williams/dp/0323554555 with error: HTTP Error 429: Too Many Requests
Response from wayback machine: {'archivedsnapshots': {},
'url': 'https://www.amazon.com/Basic-Geriatric-Nursing-Patricia-Williams/dp/0323554555'}
Failed to get cached URL from google for URL: https://www.amazon.com/-/es/M-Foster-Olive/dp/0791085457 with error: HTTP Error 429: Too Many Requests
Response from wayback machine: {'archivedsnapshots': {},
'url': 'https://www.amazon.com/-/es/M-Foster-Olive/dp/0791085457'}
Failed to get cached URL from google for URL: https://www.amazon.com/Responding-Emergency-American-Red-Cross/dp/1584805544 with error: HTTP Error 429: Too Many Requests
<?xml version='1.0' encoding='utf-8'?>
<package xmlns="http://www.idpf.org/2007/opf" unique-identifier="uuidid" version="2.0">
<metadata xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:opf="http://www.idpf.org/2007/opf">
<dc:language>eng</dc:language>
<dc:subject>Juvenile Nonfiction</dc:subject>
<dc:subject>Health &amp; Daily Living</dc:subject>
<dc:subject>Substance Abuse</dc:subject>
</metadata>
<guide/>
</package>

I only need this part (obviously):

<?xml version='1.0' encoding='utf-8'?>
<package xmlns="http://www.idpf.org/2007/opf" unique-identifier="uuidid" version="2.0">
<metadata xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:opf="http://www.idpf.org/2007/opf">
<dc:language>eng</dc:language>
<dc:subject>Juvenile Nonfiction</dc:subject>
<dc:subject>Health &amp; Daily Living</dc:subject>
<dc:subject>Substance Abuse</dc:subject>
</metadata>
<guide/>
</package>

Running the BASH noscript via Cygwin, but I can move to a Linux box.

I Googled it, but the Stack Overflow threads I got don't mention this scenario, at least not that I saw. My Shell capabilities aren't that strong.

https://redd.it/12v1lo6
@r_bash

sleep in while clause

Hello,

i found a noscript where there is sleep () inside done clause, i am not sure... but from my point of view its pure mess?

&#x200B;

while [[ something \]\]; do

.....

sleep X;

done << (sleep Y);

&#x200B;

does it make any sense to use 2 times sleep and especially inside done clause...

&#x200B;

&#x200B;

thanks!

https://redd.it/12v4cu7
@r_bash

Cool bash CLI for optimizing your development productivity on Git and other things

This a bash CLI I have been developing in my spare time. It provides developers with the ability for optimising the execution of commonly performed tasks, commands, directory navigations, and environment setups/noscript executions.

https://github.com/hwixley/WIX-CLI

Please check it out, and leave a star if you found it useful! (it helps me out alot) :)

https://redd.it/12vascj
@r_bash

Why does this work??

I am not a programmer - I like to tinker.

I needed to batch process all file name in a folder all files having the naming convention as follows

3. 3. 2023-03-14 p.1 teaching.mp3

3. 3. 2023-03-14 p.2 discussion.mp3

etc

I needed to remove all characters upto the 2023 and keep the remaining string from 2023 to the end.

&#x200B;

Here's the noscript(which I run in the folder it needs to operate):

1 For file in * ; do
2 if [[ -f “$file” ]]; then
3 upto=“2023”
4 result=$(echo “$file” | sed “s/^.*$upto/$upto/“) // this works
5 result=$(echo “$file” | sed “s/^.*$upto//“) // this does not work
6 echo $result
7 fi
8 Done

When I use the noscript with line 5 it does not work

But it works with line 4

Any idea why??

https://redd.it/12vigo6
@r_bash

I wrote a small utility to merge my dashcam recordings automatically using Bash, RFC!
https://github.com/brlin-tw/dashcam-recording-automerge

https://redd.it/12w2n1y
@r_bash

Bash noscripting indentation: Tabs or spaces? - Poll
https://poll-maker.com/poll4789276x49bA4EBF-148

https://redd.it/12wgkl3
@r_bash

How to interact with the history of the shell that the noscript is being executed?

I've found several ways but none seem to work, the closest I got is one where I got output from the commands run by the own noscript but not from the shell. I've also tried #!/bin/bash -i, set -o, looking into \~/.bash_history... that last one seemed to work, but it didn't. I want to have the same output that I'd have when I type "history" on the terminal.

https://redd.it/12wq567
@r_bash

E: Could not lock file (13: Permission denied)

I'm trying to install Node JS on linux and I keep getting errors saying what I've described in the noscript, I've treied to fix it but I can't change the permission.

I'm on Pop_OS, if that is related to the very problem I'm getting.

Cheers.

https://redd.it/12xuekv
@r_bash

How to one-line with & ?

Normally in a .sh file, I will write:

sleep 1000 &
echo 'Say this now'

But when I do it in bash -c

bash -c "sleep 1000 & ; echo 'say this now'"

It gives me an error:

 error near unexpected token `;'

How do I write it properly with bash -c?

https://redd.it/12xuacc
@r_bash

Garbage characters appearing in terminal output when using 'watch'

So, when I run the following bash command, my terminal output file gets filled with a lot of random garbage between the data I am looking for.

watch -t -n 1 'sensors k10temp-pci-00c3 -j | jq '..Tccd1.temp3input'' >> output.txt

> \[?1049h \[22;0;0t \[1;51r (B \[m \[4l \[?7h \[H \[2J46 \[51;193H \[H44 \[51;

What's causing this? Are console control characters being injected into my output file? How can I stop this?

It only happens when I run the command with watch. Running just:

sensors k10temp-pci-00c3 -j | jq '.[].Tccd1.temp3input'' >> output.txt

yields me

>45.25
>
>47.75
>
>44.75
>
>44.5
>
>48.75

as expected.

https://redd.it/12xyje3
@r_bash