Make my code even better; which tools are you using?

Hello everyone,

I spend most of my time coding with PHP and, from time to time, I create Bash noscripts that can be several thousand lines long (I have a main noscript and "helpers" that I load as external files).

I use /bin/bash -s mynoscript.sh to identify syntax errors, ShellCheck ( https://github.com/PeterDaveHello/docker-shellcheck) to identify certain errors and shfmt (https://github.com/PeterDaveHello/docker-shfmt) to force formatting of noscripts and I'm hard pressed to find any other tools.

I attach the greatest importance to the quality of my code, its readability, etc. so I'd be happy to read any ideas you have for tools I could use to analyse the quality of my code and make suggestions for improvements.

Thank you very much.

https://redd.it/1dqiq20
@r_bash

Get first output of continous command

Hello, I'd like to only have the first output of a continous command, like pactl subsribe or hyprland-workspaces ALL

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

Ssh into servers and show custom ps1prompt

I have a .bashrc file. Which has alias colors and custom ps1 prompt. In my job we ssh into a passwordless server and from that server we ssh into multiple servers(in those server we have to enter password).

Is there any way to use my local .bashrc file in those ssh servers without modifying the .bashrc file in those servers?

https://redd.it/1dqn22x
@r_bash

what are these things? do they have a name? like the "file permissions letter grid"?
https://redd.it/1dr4q04
@r_bash

portmanager: A Bash Function

## Sourcing the Function
You can obtain the function [here](https://github.com/slyfox1186/noscript-repo/blob/main/Bash/Misc/Functions/portmanager.sh) on GitHub.

## How It Works

The function uses system commands like ss, iptables, ufw, and firewall-cmd to interact with the system's network configuration and firewall rules. It provides a unified interface to manage ports across different firewall systems, making it easier for system administrators to handle port management tasks.

## Features

1. Multi-firewall support: Works with iptables, UFW, and firewalld.
2. Comprehensive port listing: Shows both listening ports and firewall rules.
3. Port range support: Can open, close, or check ranges of ports.
4. Safety features: Includes confirmation prompts for potentially dangerous operations.
5. Logging: Keeps a log of all actions for auditing purposes.
6. Verbose mode: Provides detailed output for troubleshooting.

## Usage Examples

After sourcing the noscript or adding the function to your .bash_functions user noscript, you can use it as follows:

1. List all open ports and firewall rules:

   port_manager list
   

2. Check if a specific port is open:

   port_manager check 80
   

3. Open a port:

   port_manager open 8080
   

4. Close a port:

   port_manager close 8080
   

5. Check a range of ports:

   port_manager check 8000-8100
   

6. Open multiple ports:

   port_manager open 80,443,20000-20010
   

7. Use verbose mode:

   port_manager -v open 3000
   

8. Get help:

   port_manager --help
   

## Installation

1. Copy the entire port_manager function into your .bash_functions file.
2. If using a separate file like .bash_functions, source it in your .bashrc file like this:

   if [[ -f ~/.bash_functions ]]; then
       . ~/.bash_functions
   fi
   

3. Reload your .bashrc or restart your terminal.

https://redd.it/1drgck1
@r_bash

Does anyone know how to change dualsense led color

So I'm working on a noscript that allows you to change dualshock led colors I'm trying to implement a dualsense led changer so it's compatible with ps4/ps5 controllers but ran into multiple dead ends on Google if anyone has any idea on how to do this pls let me know

https://redd.it/1drj1s3
@r_bash

Beginner-friendly bash noscripting tutorial

There are plenty of excellent bash noscripting tutorial videos, so I thought one more is not going to hurt.

I've put together a beginner practical tutorial video, building a sample noscript and explaining the concepts along the way. https://www.youtube.com/watch?v=kFovBYgtEuI

The idea is to take you from 0 to 60 with creating your own noscripts. The video doesn't aim to explain all the concepts, but just enough of the important ones to get you started.

https://redd.it/1ds25n3
@r_bash

Share your $PS1 prompt config

Intrested how people use prompts to get most of it.

https://redd.it/1ds7dkv
@r_bash

Can someone help me reed bash even if it's a screenshot?



https://redd.it/1dsian6
@r_bash

New To Bash Scripting

I am an aspiring devOps Engineer and I have been using Linux for sometime now. I am currently in a BootCamp that just give tasks and asks students to go find solutions to it within a specific deadline.

I was tasked to write a bash noscript that does the following:

1. Creates Users and Groups of random users.

2. And also sets up home dirctories with appropriate permissions and ownership, generate random passwords for the users.

3. And also log all actions to the /var/log/user_management.log

4. And also store the generated passwords securely in /var/secure/user_passwords.txt

5. Ensure error handling for scenarios like existing users and provide clear documentation and comments within the noscript.

I am still new to this.

My question is do any one has any material or links to where I can learn quickly and do this task?

I can't find good materials or course within the short period given to me to submit the task.

https://redd.it/1dsk19t
@r_bash

VERY new to this, why is my directory '/' and not '~' when I run git bash?

As the noscript says, I am very new to this. I did a codecademy course learning the command line just yesterday, in that course, it says multiple times that in Git Bash, I would start in my '\~' (home) directory, but I actually start in the directory '/' (which is C:/Program Files/Git). I do however start in my home directory when I run Git Bash as an admin.

I'm a bit unsure as to why I start here,if it matters that I do start there, and how this effects my bash profile.

If someone could ELI5, that would be amazing.

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

Script Text Manipulation

I'm stumped on this one. I'm unsure how to approach taking the output from this command and put it into a list due to the formatting.

Command:
sudo so-elasticsearch-query _cat/shards | grep UN

Output:
.ds-metrics-elasticagent.filebeatinput-default-2024.06.27-000001 0 r UNASSIGNED                                 
.ds-metrics-windows.perfmon-default-2024.06.28-000002              0 r UNASSIGNED                                 
.ds-metrics-system.core-default-2024.06.27-000001                  0 r UNASSIGNED                                 
.ds-metrics-system.process-default-2024.06.27-000001               0 r UNASSIGNED                                 
.ds-metrics-system.fsstat-default-2024.06.27-000001                0 r UNASSIGNED                                 
.ds-metrics-system.memory-default-2024.06.27-000001                0 r UNASSIGNED                                 
.ds-metrics-elasticagent.filebeat-default-2024.06.27-000001       0 r UNASSIGNED                                 
.ds-metrics-system.network-default-2024.06.27-000001               0 r UNASSIGNED                                 
.ds-metrics-system.load-default-2024.06.27-000001                  0 r UNASSIGNED                                 
.ds-metrics-system.filesystem-default-2024.06.27-000001            0 r UNASSIGNED                                 
.ds-metrics-elasticagent.elasticagent-default-2024.06.27-000001  0 r UNASSIGNED                                 
.ds-metrics-system.diskio-default-2024.06.27-000001                0 r UNASSIGNED                                 
.ds-metrics-windows.service-default-2024.06.27-000001              0 r UNASSIGNED                                 
.ds-metrics-system.uptime-default-2024.06.27-000001                0 r UNASSIGNED                                 
.ds-metrics-elasticagent.metricbeat-default-2024.06.27-000001     0 r UNASSIGNED                                 
.ds-metrics-windows.perfmon-default-2024.06.27-000001              0 r UNASSIGNED                                 
.ds-metrics-system.process.summary-default-2024.06.27-000001       0 r UNASSIGNED                                 
.ds-metrics-system.cpu-default-2024.06.27-000001                   0 r UNASSIGNED                                 
.ds-metrics-elasticagent.osquerybeat-default-2024.06.27-000001    0 r UNASSIGNED                                 
.ds-metrics-system.socketsummary-default-2024.06.27-000001        0 r UNASSIGNED

As you can see, this is in an odd tabular output that makes it difficult to assign the filename to a variable (it can go to a file, too, I haven't decided yet).

Follow-up command uses the $index variable as a placeholder for the filenames. My goal is to automate this so that any of my techs can run this noscript without issue.

sudo so-elasticsearch-query $index/_settings -d '{"number_of_replicas":0}' -XPUT

How do I manipulate the output so I can use it?

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

a Mathematics for Bash - and how that relates to AI, hopefully 🥸

TLDR: I have found a Mathematical way to build custom languages for AI applications using a mix of Bash and Python. below are examples, and here is the Mathematics: https://kamangir-public.s3.ca-central-1.amazonaws.com/giza-v1/giza.pdf this is very much a wip, \~6 years old, started on raspberry pi's. I think new Mathematical ways of making sense of AI are possible. this might be one step towards them.

---

here is an example,

vanwatch ingest help
vanwatch ingest area=vancouver,count=5,gif
@download open 2024-07-01-15-40-04-67778

https://preview.redd.it/cntempy9jz9d1.png?width=1946&format=png&auto=webp&s=c7df0769fac63ff8881391ac6610ecd480e2c7cc

https://i.redd.it/bcisse4plz9d1.gif

vanwatch lives in: https://github.com/kamangir/Vancouver-Watching and is (almost*) pip-installable: https://pypi.org/project/vancouver-watching/

* almost because this is wip, see my blog for the progress report and plans: https://arash-kamangir.medium.com/%EF%B8%8F-open-ai-experiments-121-298ff881cfa7

---

here is another example,

ukrainetimemap ingest help
ukrainetimemap ingest - - open

https://preview.redd.it/key6t9nwjz9d1.png?width=1946&format=png&auto=webp&s=8d971293312169c7a556b69881000208bf112c7c

ukraine_timemap lives in https://github.com/kamangir/blue-geo it ingests the latest data on civilian harm in Ukraine from Bellingcat: https://github.com/bellingcat/ukraine-timemap as well as other things and is pip-installable: https://pypi.org/project/blue-geo/

https://preview.redd.it/xyz1a64rjz9d1.png?width=1946&format=png&auto=webp&s=8a160cbba796a8a9e5830d99409802ad82fd1e75

https://preview.redd.it/4votxeusjz9d1.png?width=989&format=png&auto=webp&s=ef4168971bd2a68239718cffc46e9a62f4a0e414

https://preview.redd.it/zjpbjrn7nz9d1.png?width=2470&format=png&auto=webp&s=8438f6db51bb665ddc13632eb80e2ca5ad45a2b4

---

more here: https://github.com/kamangir

https://redd.it/1dt6wfz
@r_bash

Why is This If-Then Not Working as Expected?

I know that this is redundant, but it will be easier for me. Can someone tell me why the pattern match is not working correctly? I am trying to match against the EXACT pattern, but so long as there is AT LEAST the pattern in the argument, it evaluates matching.

eg... I am looking for EXACTLY 00:00, but if you put f00:00, that still qualifies as matching. How can I force the pattern to match EXACTLY as shown an NOTHING additional? I hope that makes sense.

#! /bin/bash

# ..........................
# noscript to call 'at' alarm
# ..........................

timePattern="0-90-9:0-90-9"
datePattern="0-90-9\.0-90-9\.0-90-90-90-9"
usage=0

if $# -eq 0
then usage=1
elif ! [ $1 =~ $timePattern ]
then
echo; echo "!! incorrect TIME format !!"
usage=1
elif ! [ $2 =~ $datePattern ]
then
echo; echo "!! incorrect DATE format !!"
usage=1
fi

if "$usage" = "1"
then
echo; echo "USAGE: setAlarm TIME DATE"
echo; echo "where TIME = hh:mm in 24-hour format"
echo " and DATE = dd.mm.yyyy"
echo
exit
fi

# echo DISPLAY=:0.0 vlc music/alarm.mp3 | at $1 $2

echo; echo "To show active alarms, use 'atq'"
echo "To remove active alarm, use 'atrm #', where # is shown using atq"
echo

https://redd.it/1dtax34
@r_bash

Quirk while getting pwd user info in prompt

Hey all, have had a setup in my PS1 which would display the current user and group owner of the current working directory, however when going in to get a list of my epubs found that if the pathname contains spaces it will break down. Stat sees the spaces as separation for different directories, attempted different ways of referencing the working directory to stat, have been trying different combinations of qoutes and backslashes at this bs, but hey probably some more clever people in this sub.

Just for context RANDPROMPTICON is an icon choosen randomly and dircol sets the color for the folder displaying before the current working directory.

# Fix for split name PS1="\${SEPDEND}${L_SEPERATOR}${SETDARK}  \u ${RANDPROMPTICON} \${SEPD2L}${R_SEPERATOR}${SETLIGHT}  \A ${SEPD2L}${L_SEPERATOR}\${SETDARK}󰒓 \j${SEPDEND}${R_SEPERATOR}\n\ ${SEPDEND}${L_SEPERATOR}${SETDARK}"'$(dircol)'" ${SETDARK}\w${SEPD2L}${R_SEPERATOR}\${SETLIGHT}"'$(stat -c "%U" .)'"${SEPL2D}${R_SEPERATOR}\${SETDARK}"'$(stat -c "%G" .)'"${SEPDEND}${R_SEPERATOR}${SETUNDO}\n\ ${SEPDEND}${L_SEPERATOR}${SETDARK} exec${SEPDEND}${R_SEPERATOR}${SETUNDO} "fi

https://redd.it/1du5adf
@r_bash

How to highlight my bash prompt, to colorize my terminal?

I'm trying to do customization to my terminal and I would like to use some power-fonts to do so, In order to get the desired affect I want the background of my bash prompt to be highlighted the same color as my terminal with black lettering--what would I set "PS1" to?

https://redd.it/1du572v
@r_bash

Copy previous output in tmux

i have this really neat config for `foot` terminal which lets me copy previous output

file `~/.bashrc`:

command_done() {
printf '\e]133;D\e\\'
}
PROMPT_COMMAND=${PROMPT_COMMAND:+$PROMPT_COMMAND; }command_done


file `~/.config/foot/`:

[key-bindings]
pipe-command-output=[sh -c "f=$(mktemp); cat - > $f; wl-copy < $f"] Control+Shift+g

for some reason this doesn't work in tmux

i know tmux can select with `tmux prefix` + `[`, `ctrl` + `space`, `enter`

but this requires to manually select with arrow keys.

https://redd.it/1du9wwu
@r_bash

Bug in bash? (CWD changing in weird ways)

I've found an interesting issue in bash:

[\~\] $ mkdir a a/b
[\~\] $ cd a/b
[\~\] $ rm -r ../../a
[\~\] $ env -i PS1='[\\w\] $ ' bash --norc
shell-init: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory
[.\] $ cd ..
chdir: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory
[..\] $ cd .
[..\] $ ls
directory listing for \~, although I only did `cd ..` once.

From now on, every subsequent `cd .` or `cd ""` will apply a `cd ..` operation (instead of staying in the CWD). Similarly, a `cd ..` would go up two directories (instead of one), then three, then four, etc.
What could be some reason for this?

https://redd.it/1duhm4f
@r_bash

Is this bash noscript safe ?

This was posted online and meant to be downloaded from a web server and ran like this:

curl -fsSL https://example.com/url | bash -s --

or this

curl -fsSL https://example.com/url | bash -s -- 1.1.1.1

The purpose of the noscript is to verify that your system resolver or the resolver added as a positional parameter will be accepted by spamhaus for spam verification.

I will never run a curl http://example.com/url | bash noscript. but i did download this one and checked it out.

Is it safe ? Can somehow additonal positional paramaters be added to the downloaded noscript ?

my concerns

1. It is way to convoluted
2. the positional parameter later has an @ sign prepended. This is to define the nameserver to query with dig but what does on later bothers me . line 33
3. line 47 is the main line . somehow can the positional paramaters which are now in $dns be manipulated to do other things. Then the whole reversal with awk. then it echos a variable ?

I added line numbers to the noscript. thanks

1> #!/usr/bin/env bash

2> dnsip="$1"

3> test_IP='127.0.0.4'

4> if [[ -t 1 ]]; then

5> AZ="$(tput setaf 45)"

6> RO="$(tput setaf 160)"

7> VE="$(tput setaf 40)"

8> NO="$(tput sgr0)"

9> else

10> AZ=""

11> RO=""

12> VE=""

13> NO=""

14> fi

15>

16> # Function to validate ipv4

17> validate_ipv4() {

18> if [[ -z "$1" ]]; then

19> return 1

20> fi

21> if grep -Pq '^(([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)\.){3}([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)$' <<<"$1"; then

22> return 0

23> else

24> return 1

25> fi

26> }

27> # Check whether user has used an ip as dns server to test or use the default system name server

28> if [[ -n "$dnsip" ]]; then

29> if ! validate_ipv4 "$dnsip"; then

30> echo "${RO}Error${NO}: $dnsip is not a valid ip v4"

31> exit 1

32> fi

33> dns="@$dnsip"

34> else

35> dns=''

36> current_dns="$(grep '^nameserver' /etc/resolv.conf | head -1 | awk '{print $2}')"

37> if ! validate_ipv4 "$current_dns"; then

38> echo "${RO}Error${NO}: $current_dns is not a valid ip v4"

39> exit 1

40> fi

41> fi

42>

43> # Loop to test 10 times whether dns server is blocked/ignored by Spamhaus

44> errors=0

45> for i in {01..10}; do

46> # shellcheck disable=SC2086

47> out="$(dig +short txt $dns "$(echo "$test_IP" | awk -F '.' '{OFS="."; print $4,$3,$2,$1}' 2>/dev/null | sed 's/$/\.zen\.spamhaus\.org/')" | tr -d '"')"

48> if grep -q 'Listed' <<<"$out" &>/dev/null; then

49> echo "${VE}Test $i${NO}: $out"

50> elif grep -q 'open resolver' <<<"$out" &>/dev/null; then

51> echo "${RO}Test $i${NO}: $out"

52> ((errors += 1))

53> else

54> echo "${RO}Test $i${NO}: Request ignored by Spamhaus or DNS Resolver timed out"

55> ((errors += 1))

56> fi

57> sleep .1

58> done

59>

60> # Show result

61> echo

62> if [[ $errors -gt 0 ]]; then

63> if [[ -n $dnsip ]]; then

64> echo "Result is ${RO}bad${NO}, Spamhaus is blocking/ignoring the DNS Resolver ${AZ}$dnsip${NO}"

65> exit 100

66> else

67> echo "Result is ${RO}bad${NO}, Spamhaus is blocking/ignoring your current DNS Resolver ${AZ}$current_dns{$NO}"

68> exit 100

69> fi

70> else

71> if [[ -n $dnsip ]]; then

72> echo "Result is ${VE}good${NO}, Spamhaus works fine with the DNS Resolver ${AZ}$dnsip${NO}"

73> else

74> echo "Result is ${VE}good${NO}, Spamhaus works fine with your current DNS Resolver ${AZ}$current_dns${NO}"

75> fi

76>

77> fi

https://redd.it/1duq3ic
@r_bash

Why can't we inline command exit codes when using 'return'?

Why can't we inline command usage with the return keyword to simplify function exit codes?

Something like this:

function myrandomcommand() {
return anotherrandomfunction
}

Not to get this confused with getting the command output of the function, just the exit code from it.

I ask because there have been some occasions where all I want is the exit code from a command and have to call the command and then reference $? (It's not like that's bad, but it would be cool to have something else to get the code).

Maybe like a command substitution but dedicated to retrieving the exit code like this:

function myrandomcommand() {
return @(anotherrandomfunction)
}


Has something like this already been implemented into bash and I'm just unaware of it, or is there a specific reason that this was left out? This might be too specific of an operator to be useful for everyone, so I'd understand if it was in fact left out.

https://redd.it/1duunm1
@r_bash

How can I automate these tree commands I frequently need to type out?

I would like to run:

git add .
git commit -m "Initial "commit"
git push

I got bored of typing them out each time. Can I make an alias or something like "gc" (for git commit). The commit message is always the same "Initial commit".

https://redd.it/1duw6ac
@r_bash