Questions tagged [bash]

BASH is the GNU Bourne Again SHell, the successor to the classic Unix Bourne sh (shell). It's the default shell for various GNU systems.

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3
votes
1answer
56 views

Bash program that sets up and configures the environment for new Debian installs

Here is my second version of a bash program I'm writing, as per @hjpotter92 I've updated and cleaned it since last: This script is run directly after a fresh install of Debian, to do: sets up ...
3
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2answers
49 views

Check that file is fully downloaded by FTP

I have a task in which I want to handle error occurred in FTP downloading, For which I used the wget command to download a file via FTP and once the download is ...
2
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1answer
31 views

Ubuntu kernel update and removal automation script

This is my first bigger than a few lines bash script. It automates kernel updating and removing on Ubuntu through ukuu (Ubuntu kernel update utility). I'm not yet ...
4
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2answers
53 views

CGI for htpasswd registration

I decided to go with a very simple CGI user registration program to pair with Apache's mod_auth_form wrapper around a private site. It was only just after I ...
2
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2answers
134 views

Bash script to change network interface parameters/configuration and start virtual machines

On my Arch Linux system I have created a script that should do the following on system startup: detect all network interfaces check if physical interfaces are up check if bridge interfaces are up ...
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2answers
162 views

Simple Linux upgrade script in Bash revision 2

As I will be deploying this script on multiple machines with the very same system Linux Mint 18 with rather same configuration, I would like to be semi-sure I won't screw things up much. This little ...
9
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2answers
1k views

Memoizing or caching Bash function results

Update: I've implemented several of the features suggested below and packaged the improved code into a dedicated project: bash-cache . I display a number of expensive operations in my Bash prompt (e....
4
votes
1answer
34 views

Small script to verify hash of a downloaded file

You know how whenever you download a file you should really compare the hash of the download to the one provided on the website? This makes absolute sense, but it's a pain to do it letter for letter, ...
5
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1answer
141 views

Bash script to setup new Debian installs

This script is run directly after a fresh install of Debian, to do: sets up syntax highlighting in nano, sets up iptables, sets ...
2
votes
1answer
48 views

File generator in shell script

I'm a student, and most of my lab work includes writing programs (usually .cpp) run them, copy the source code and output to a word file and either mail a pdf to the concerned teacher or submit in ...
6
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2answers
403 views

A baby monitor using a Raspberry Pi to send push notifications when triggered by noise

I have a Raspberry Pi 3B with a USB microphone. I have used a combination of Bash and Python scripts to detect noise levels above a certain threshold that trigger a notification on my phone. The ...
2
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1answer
67 views

Check SMART status on MacOS and pop up alert

So I don't know much about bash scripting. I am just a beginner. I made this script which checks the SMART status of my root volume and if it is failing then it immediately throws a pop up alert if ...
2
votes
1answer
53 views

User-friendly script for searching through log files

A BASH script that ask users simple questions and greps the syslog archive files (plain-text and gzipped). The script is fully working; I am looking for advices on: Coding style Possible ...
10
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3answers
19k views

Extracting data from text file in bash using awk, grep, head and tail

I've been writing bash script on and off, with pretty good results in terms of getting the job done. However, I'm worried that my script might be very ugly, as I am a beginner. I'm looking for advice ...
3
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3answers
133 views

Write the running time to file without capturing the program's output

I want to run an application and write (append) its processing time into a file. Also, I want to see the stdout and stderr output on the shell, but don't want to write it in a file. After running the ...
3
votes
1answer
41 views

Bash delete folder if not present in other folder

imaging a folder structure like: Peter |- Cats |- Mini |- Maunz |- Tippsi |– Dogs |- Brutus Eva |- animals |- Mini |- Brutus I'd like to ...
6
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2answers
81 views

Interactive bash script to create new permanent swapfiles

I started self-learning Bash scripting yesterday, and I finished my first successful "advance" script. Goal To create an interactive step-by-step script to that allowed customizing various parts of ...
2
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1answer
48 views

Making a disk usage breakdown

I'm looking for a better way of doing this code I made. I work for tech support and one of the biggest questions I am asked is: "Hey, how did my disk get so full in my VPS?" I am aiming for output ...
3
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1answer
1k views

Bash script creator app

I am a beginner and have created this bash script that helps me with creating bash scripts. The script shows no issues on shellcheck.net The code can be found here. https://github.com/plutesci/...
3
votes
1answer
154 views

Bash script to extract wifi passwords from NetworkManager

This is my first shell script, so I am trying to see if I can get some suggestions. It extracts saved wifi passwords from Linux. ...
2
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1answer
192 views

hangman in bash

Rules 7 mistakes allowed. Hangman rules. Disclaimer I don't have a figure (drawing) of the hangman as this project took way longer than I thought I would take. It took like 9 hours during 3 weeks. ...
3
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2answers
119 views

Crawl and gather all the urls recursively in a domain

This is the script : ...
5
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3answers
93 views

Repeatedly fetching a URL until the response contains “state: INIT”

I am working on a project in which I need to make a URL call to one of my servers from a bash shell script. http://hostname.domain.com:8080/beat After hitting ...
4
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2answers
70 views

Finding domain details with bash

Here is my code to find the details of the domain. The domain can be feed as following: ...
5
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1answer
62 views

Sed script that removes specific lines in `seq` output

I have a file to process with sed but I am not quite familiar with the commands with capital letters used for multi-line patterns. I use ...
7
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2answers
67 views

Bash evaluation using crazy passwords

I have some code that is loading passwords from AWS SSM and then using them through the script. I am really concerned that some funky password character is going to be used that is going to get ...
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2answers
40 views

chmod all .htaccess files under all website dirs under public_html dir

This is my code to chmod all .htaccess files under all website dirs under public_html dir. The reason I use this code is to make sure WordPress plugins won't "...
3
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2answers
56 views

Bash script to rsync website

I'm new to bash scripting. I have pieced together a bash script to rsync my website files and databases. Any guidance on ways I could improve or make my script more secure would be greatly ...
6
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1answer
337 views

Updating my package version using only a Makefile

So I have written a Makefile that has a release function that can be run like: make release bump=patch and I want it to be fully ...
8
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2answers
177 views

Copy files in parallel by reading what files to copy from few other files

I am working on a little complicated shell script for the first time and this is what it should do: During startup, it figures out what is my clientid by looking ...
8
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1answer
160 views

A Simple Bash Timer

This is a timer I made quite some time ago and just came across it again today. I'm just wondering if there's anything wrong with it or anything I could improve. ...
6
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3answers
287 views

Symlinking shared libraries from a platform-specific directory

We have a setup script for setting up a development environment, and setting up the image libraries is getting a bit messy: ...
4
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2answers
5k views

Bash CGI Upload File

I'm using the following Bash CGI to upload a file: ...
2
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1answer
60 views

Sign an EC2/S3 URL Version 2

Follow up on previous review: Sign an EC2/S3 URL I have fixed the previous comments. I have also added the code needed to sign HTTP header fields as part of the request. ...
4
votes
1answer
35 views

throwcatch: Super easy, SFTP-based backup tool

I've been working on a project for fun, it has reached a place of pretty decent stability and I would like to hear any and all criticisms you can find. The project basically enables admins to create ...
3
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1answer
96 views

Start the Python interpreter with an import statement

When I'm writing Python, I wanna be able to pull up an interpreter quickly, and import what I need easily. Previously, this involved: ...
7
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1answer
81 views

Squire for your recursive SSH adventures

One day I used to SSH to lots of machines to do some administrative tasks. I constantly used l to list directories just like I do on my own machines. Guess what, ...
3
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1answer
31 views

Creating charts for my UPS metrics - Part 2

Following up from my previous question Streaming my UPS metrics for graphical viewing in bash ...
4
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1answer
460 views

Bash script to replace string in database

How secure is my script? ...
3
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1answer
34 views

Streaming my UPS metrics for graphical viewing in bash

I have an APC UPS, which comes with the apcaccess utility to get various statistical values from the apcupsd daemon service. I ...
6
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1answer
71 views

Install Python script requirements

Sometimes I download a Python script (from a trusted source), and can't run it because of missing dependencies, which I have to install one by one (no ...
2
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1answer
107 views

Dompdf LFI (Local File Inclusion)

Intro During a CTF I encountered a dompdf LFI vulnerability, which is explained at exploitdb. However when I executed that vulnerability it gave it to me in PDF form, and it was a pain to constantly ...
4
votes
3answers
69 views

Write bootable image to USB device

Recently, I've been making and refining installer and rescue images to boot from USB media, in the form of CD-ROM or hard disk images. After a few occasions where I re-ran the command after removing ...
3
votes
2answers
65 views

Moving files and leaving links in bash

The objective of this code is to create a command that move files and leaves links in their place. I'm just a beginner in shell scripting and it would be quite useful to hear your opinions on how to ...
8
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2answers
172 views

Identify users who have logged in as root

This is a program written in Python 3.x and Bash to check and find any users who have logged in as root via sudo su, sudo -i, ...
2
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2answers
220 views

Bash script to generate and change Java keystore passwords

This is the first Bash script I've written, so I'm looking for feedback on best practices, conventions, things like that. This script makes a few assumptions There is a java keystore stored at ...
1
vote
1answer
110 views

Read integers from text file and write to CSV file

Background: I've recently started learning bash due to my new job in a VFX company. We backup all of our media to LTO tapes (one master and one clone). I was tasked with writing a script that split ...
2
votes
1answer
51 views

Small bash script to enhance virtual environments on directory navigation

Ages ago I made a small bash script which would add a command cdp, standing for "change directory - project". What it did was ...