Questions tagged [sh]
sh, aka Bourne Shell, is the Unix Shell, the standard shell since v7 Unix. POSIX has standardized the shell, and portable shell scripts should conform to /bin/sh syntax.
103 questions
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Using git autobackup with shell script
I have php website for prevent hacker modify any file and inject backdoor.
I want to use git as a file tracking solution. This is my shell script:
...
- 139
2
votes
2
answers
50
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Check if program has been installed successfully at a given path
The path is provided as an argument by a Makefile within an install target. The script verifies if the specified path is already included in the system's ...
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2
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1
answer
140
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Update a docker compose service properly
I'm currently running an executable in Docker that has been mounted as a Docker volume in the foreground. The executable (or the service) continuously generates console output and can be interrupted ...
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0
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1
answer
34
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Yet another sh script to backup one directory
A single directory should simply be backed up with the zip tool, and the time of the backup should be preserved in the file name. I have written a Posix shell script for this.
Can this script simply ...
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2
votes
2
answers
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Script to prevent nested root shells (POSIX)
Script to prevent nested root shells shall do exactly as said, plus some niceties like an error message when someone runs it with some argument/option.
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3
votes
1
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Debian and Docker compose upgrade script, 2nd version
As a continuation of this question, I would like a second review from you.
Here is the updated sh script:
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3
votes
1
answer
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Debian and Docker compose upgrade script
I'm running Debian 12 and Docker compose containers. Once a day, crontab should start the script, but the script should also be called manually. Could you rate my upgrade script file or recommend an ...
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3
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Blog site generator written in shell script
Since I am not a fan of having using large web-frameworks and libraries just to setup a simple blog, I decided to write my own static blog site generator in pure shell script.
The script uses pandoc, ...
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2
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1
answer
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Shell script to download multiple files from different URL's using for loop to download and verify files on each invocation
The expected behavior of the script is to download a file from a URL if the file is not present in the current directory and compare the md5 checksum of the file against the md5 checksum from the ...
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0
answers
33
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For loop to download files once and verify them on each invocation [duplicate]
The complete script works as expected. I am able to download and verify the files. If the file is all ready present verification is retested and downloads if necessary.
I'm in the process of teaching ...
- 41
2
votes
2
answers
126
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Linux Script Set Permission Function
I wrote a simple script to set permissions for a file or folder for some embedded Linux devices as part of a larger setup script.
This method would be called on less than 20 files and folders. It ...
- 203
1
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2
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Shell script to download, compile and run Analog Clock in AEC
As some of you know, I have made a programming language, called AEC, and written two compilers for it, one targetting x86 and other targetting WebAssembly. Recently, I have tried to write two shell ...
- 475
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1
answer
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Find first or last argument lexicographically or temporally
I often find I need to find the earliest or latest file matching a given pattern, and sometimes to choose the lowest or highest string from several possibilities.
The following four functions provide ...
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3
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1
answer
67
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PDFcomp: A PDF comprimer easy script
I developed this script in dead time to be able to compress the PDFs that they send me to university and also to be able to send scans to the various institutions that require formats that do not ...
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1
vote
1
answer
102
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Lexer for shell-like language [rust]
I am working on writing a rust implementation of a sh-like language.
Rather than posting 600 lines of code here, you can just go to the GitHub repository.
Is this a ...
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5
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1
answer
542
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Replace version numbers in multiple files
In the script below I need to search in multiple files, and find a string, and replace with another.
It's basically version numbers (which need incrementing). Every time I find the old version number, ...
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2
votes
1
answer
130
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Chaining perf with FlameGraph
This is my first serious shell script, so it is probably horrible.
Problem statement
I decided to improve my profiling skills as so far they were mostly about hand-rolling counters and timers. After ...
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4
votes
1
answer
56
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Whose `git` is it anyway?
A Posix function for finding the nearest parent file. For example "what .git/ am I working in?" or "is there an .npmrc affecting npm from this path?&...
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4
votes
1
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133
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Shell script to download Project Euler problems and combine to PDF
This is a script I created that downloads Project Euler webpages and combines them to PDF. The script also downloads animated files.
...
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1
vote
2
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Editing system files in Linux (as root) with GUI and CLI text editors #3
One year and a half ago I posted the second iteration of this script for a review here:
Editing system files in Linux (as root) with GUI and CLI text editors #2
Since then, it has been "...
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3
votes
1
answer
118
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5
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1
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243
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Generating a domain and IP blacklist with Bash
This is a project to pull domain & IP blacklists from various sources and compile them into one list. There are some whitelists included that are applied when a blacklist is built.
It draws ...
- 3,137
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3
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Updating text in a HTML document with Bash
This is a small script to update my project's README file. Notes on improvements from any aspect are welcome!
Here is the document it updates.
readme.sh (Executed like so: ./readme.sh)
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- 3,137
2
votes
1
answer
52
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Testable and self-contained bash script
I wrote a short bash script for a completion check of downloading images.
goal of this code (Added)
I have some downloading content directories. Each of them has a script for downloading images(...
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votes
1
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63
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The Blacklist -- Follow-Up 2: Electric Boogaloo
One of my main goals regarding this script has been to figure out a way to use the "adblock.sources" file available on its main repository and not my fork. That version has some syntax ...
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The Blacklist - follow-up
Follow-up from this question using @Toby Speight's answer:
The primary concern is jq improvement/optimization, but please detail any others.
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4
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1
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The Blacklist: Blocking Malicious domains using Bash
I've made this script to automate blocking some deviant hosts on my router, and was curious if there's anything much else that can be done to make it quicker and more efficient.
Presently I'm ...
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2
votes
1
answer
58
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Portable Build System for Virtual Machine with Editor and Unit Tests
I am automating the building and unit testing of a personal
project using shell scripts
, CMake and make on the latest version of Fedora Linux. I have also tested building on the latest version of ...
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1
vote
1
answer
70
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Attempt on basic input validation and functional programming in a POSIX shell
In spite of all the POSIX shell disadvantages, I am still sticking with it and I love its portability.
Recently, I was searching for a way of code re-use, which turns out to be structured programming ...
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4
votes
2
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139
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*nix, *bsd, etc basic `tput` color setup
My goal with the below piece of POSIX shell code was to address the more platforms the better with shell tput colors. With this code, I now start all of my scripts, ...
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2
votes
0
answers
32
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sh script to open related URL based on possible nicknames
I'm new to sh and I would like to get feedback on how I can improve my code.
The purpose is simple; I want to open the Jenkins JOB related to a service based on its possible aliases. If I map a ...
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3
votes
1
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67
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Project setup script
It's a pretty simple script really. I just want to know if there is a way to improve it.
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4
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1
answer
150
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Find download URL for a package, from almost-JSON with substitutions
I have an almost-JSON document in a file named versions.json. It looks like this:
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2
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POSIX shell function to "dump" all given arguments
My today's idea was to create a POSIX shell function to dump all given arguments, typical use would be to call it from a fucntion, where you already know some arguments are not well set (empty; not ...
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1
vote
2
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Editing system files in Linux (as root) with GUI and CLI text editors #2
This is the second iteration of this question
A note to start with: the first iteration of this question can be found here:
Editing system files in Linux (as root) with GUI and CLI text editors
As ...
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2
votes
0
answers
50
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Outputting a standalone shell script from arguments
I am solving an exercise. Essentially, it's a shell script that takes in file and/or directory arguments and outputs another (standalone) shell script that outputs these files, including any directory ...
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Shell command to output all plugins that exist across multiple wordpress installations
I'm working on a server and need a complete list of plugins that are installed for all wp installations. I only need to know whether a plugin exists or not, it doesn't matter where it exists.
For ...
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votes
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answer
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Bulk File Rename
A function that funnels all filenames into a file and opens that file in vim. The user then changes the names, saves, and quits. Finally the function renames the files in the folder with the new names ...
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Code to backup the history file in Linux [closed]
How is the logic, efficiency and can it be improved?
This is a snippet from my .bashrc file; I just wrote it and I've tested it and it almost works. This was the ...
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1
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Bash Code to backup the history file in Linux [closed]
How is the logic, efficiency and can it be improved?
This is a snippet from my .bashrc file, I just wrote it.
The code is supposed to do this:
Backup my ...
9
votes
2
answers
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Count line of code for a JavaScript project
Here is my bash script that I just wrote to count line of code for JavaScript project.
It will list number of:
Comment lines
Blank lines
All lines
Here is my script:
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- 315
3
votes
2
answers
213
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POSIX shell function for asking questions
I've written a tiny function for asking questions intended for my POSIX shell scripts, where I often need user input.
The function takes 2+ arguments, where:
Is a string containing the question.
, 3....
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3
votes
1
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652
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checksum hash verification functions for bash scripts
just a little script, or a bit of a template of one that I used to submit an assignment.
I believe it all works fine, I just wanted to give it to other people, and get some feedback on it; maybe make ...
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votes
1
answer
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batch add users to nextcloud on docker with csv
I have a working script that will batch add users to an instance of nextcloud running on top of docker. This version is the result of changes made after asking this question.
I guess I'm looking for ...
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2
votes
1
answer
132
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Editing system files in Linux (as root) with GUI and CLI text editors
My intention is to POSIX-ly write one generalized function for running various text editors I use for different purposes through sudoedit, i.e. editing files as ...
- 1,826
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votes
1
answer
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Is device mounted? Both UUID and device names accepted
I am trying to write an is_device_mounted script, which in turn will serve a greater purpose in my home Linux system.
It does not even have an error reporting ...
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2
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2
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Lock file and interrupt signals in POSIX shell script running indefinitely
This script is running indefinitely as the Linux background process.
I have put an enormous effort to make this POSIX shell script containing an infinite loop shut down tidily along with the ...
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2
votes
2
answers
53
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POSIX-ly finding a specific Java process
In this code I find a list all of the running java processes and give the below function a name to look for, it will do its best. But since I find my approach a ...
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3
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1
answer
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Easy to use code preparation script for CodeReview questions
We all face questions that forget to include their code. Sometimes all of it, sometimes only parts, that make the rest of the question unfortunately incomplete and therefore off-topic.
What if it was ...
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2
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1
answer
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Interactive Linux upgrade script - Follow-up #1
One year ago I asked for a yearly revision of my Interactive Linux upgrade script.
There is nothing new to the conditions, therefore please read the original question before you decide to comment and ...
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