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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7
votes
1answer
2k views

Bash script for getting geolocation (latitude, longitude and country code)

I have a bash script, where I need to get the user's geolocation (latitude, longitude and country code). If a GPS device is present, I use gpspipe. But a lot of laptops/computers don't have GPS ...
2
votes
1answer
50 views

Controller web interface security

I'm designing a web interface to a controller for my school's bell. Are there any security flaws in this code? The source code is available here. Front End: ...
5
votes
1answer
132 views

Updating an Nginx config file for SSL

This script updates a settings in ssl config file for Nginx. I generate DHEC key and then update the Nginx SSL file to that location. I also give an option for the user through arguments if they want ...
7
votes
5answers
313 views

Mounting multiple partitions on a disk

Is it possible to improve the code of this bash script? ... or should I just use another language? (If so, which one would fit the best the situation, according to you?) Here is the code (simplified, ...
4
votes
1answer
610 views

Bash script for tagging the current git workspace including uncommitted changes

I use the following script to autotag the current workspace while building even if there are changed (not committed) files: ...
9
votes
2answers
6k views

Using /proc/stat to calculate CPU usage

Inspired by this question: To calculate the total CPU usage as a percentage I wrote the following bash script (as an answer) to calculate the CPU usage for a (configurable) period over all CPU cores ...
16
votes
2answers
11k views

To calculate the total CPU usage as a percentage

I have been developing the below method to calculate the CPU usage of a Linux system at a point in time, as a percentage of the total number of cores available in the system. ...
4
votes
1answer
49 views

Script to fix audio level

I need to fix and maintain the master volume in PulseAudio (so that I don't blow up my speakers). E.g. call gfaaudio -v 25 to fix volume at 25%. Is there a cleaner ...
4
votes
2answers
112 views

A better way of always dumping Gedit out of Terminal?

I use terminal alot, so it was frustrating to me to deal with gedit's inconsistent behavior between having a window open and when one was not. I ended up searching around, and finding a way of getting ...
3
votes
1answer
572 views

Bash functions to run/manage MySQL, Redis, Sidekiq, Rails server

I'm working with a Rails app that requires a few layers of infrastructure to run: MySQL, Redis, Sidekiq, and (of course) the Rails server. I wrote some functions to help me manage the various servers (...
10
votes
3answers
21k 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 ...
6
votes
2answers
2k views

Function autoloading in bash

I'm wondering if anyone can code review my code below. That's the core code of my little framework for bash in GitHub. ...
5
votes
2answers
114 views

File handling script

This is my first bash script so I ask to you to say what you think. The script must check every directory and if it finds a pdf file in this directory: move all the pdf files to parent directory, ...
6
votes
1answer
535 views

Git commit-msg URL shortener

I have just written my first git hook script. It is very simple that simply finds any URLs in the commit message and uses the Google URL shortener to rewrite the URL nicely. it is located here. I ...
5
votes
1answer
209 views

Generic Makefile

I decided to setup a generic makefile to compile SFML programs, as I'm going to be making a bunch of small apps over the next few weeks playing around with it. I'm still new to writing makefiles (...
3
votes
1answer
56 views

Cheat Code Scraper

During breaks, I find myself playing Emerald version a lot and was tired of having to use the school's slow wifi to access the internet. I wrote a scraper to obtain cheat codes and send them to my psp ...
4
votes
3answers
212 views

Git script that fast forward merges and deletes the old branch

This script fast forward merges a branch and then deletes the old one. I normally run it like this: git m master feature Here's a link to the gist. ...
6
votes
2answers
87 views

OS testing script

This is a script I made for testing a simple operating system. It assembles the source and creates a boot image, then It automates the configuration of a Virtual Box machine. ...
6
votes
3answers
35k views

Small bash script to start and stop named services

I've been working on ubuntu since many years but not quite familiar with bash scripting. My development tools involve servers like nginx and apache, the mysql database and beanstalkd. Obviously, I ...
4
votes
2answers
96 views

Filter shell script to find lines that contain all specified patterns

I wrote a script that does the following: Run another script on the system Filter the output to find lines that contain ALL of the given patterns Pipe the output to a second script on the system I ...
7
votes
2answers
84 views

Trash Filing System

This is a script (function) to be added to a bashrc. The purpose is to not actually remove files, but rather to send them to a trash folder for safe keeping. I was tired of deleting important files. ...
2
votes
1answer
62 views

IPtables for webserver with SSH

I've had a bit of help but I'm still a bit unsure. I have an nginx webserver with SSH only required. I wrote this rule set based on information I found on the internet: ...
6
votes
1answer
226 views

Building/installing bash script

I'm writing a bash script that has these goals: to build a node program from sources to install the built program on Ubuntu Linux to allow the user to rebuilt from most recent sources to add a small ...
2
votes
1answer
47 views

Grep to search for array of location targets

Please review my short 65 lines of code: Is there a way to avoid eval (security)? Is there a better way or place to use ...
2
votes
2answers
118 views

Comparing if-else and case condition

I have a script used for installing few rpms depending on operating system type. Here in this example, the script will install packages on two system "centos" and "suse". The system names are listed ...
4
votes
1answer
179 views

Copying into two different folders on a machine simultaneously

I am trying to copy files from machineB and machineC into machineA as I am running my shell ...
10
votes
1answer
355 views

Bash Music Player 2

This post is a follow-up to this. I wanted further reviews since the code I provided became too old when I got replies, which is why I'm providing it again here. I'm hoping I could get reviews for ...
4
votes
1answer
141 views

Shortcut script for elusive grep command

This is an example of my filesystem: /code/ internal/ dev/ main/ public/ dev/ main/ release/ tools/ /code/internal/dev/, /code/public/dev/ and /code/tools/ contain subdirectories for multiple ...
6
votes
1answer
181 views

Copying files as fast as possible

I am running my shell script on machineA which copies the files from machineB and machineC ...
5
votes
1answer
862 views

Bash Music Player

I have finally finished creating my first real project. It's just a simple music player that can provides the user with the latest music from any site (as long as it contains MP3 files) he provides ...
8
votes
1answer
895 views

Bash script to clone all public repos or gists for a specified user, optionally to a directory of choice

I wrote this script as a way to backup and/or download quickly a set of repos or gists from a user. I don't have any major concerns but I'm a noob at bash scripting, and I've been scouring the ...
6
votes
1answer
120 views

Bash script to convert NIST vectors to debug scripts

TL;DR: The Bash script converts a published, somewhat-structured text file into a format usable by my testing infrastructure. It's slow, I think it's ugly -- although it is fully functional. The NIST ...
7
votes
3answers
108 views

Encrypt and backup folder to email daily, when online

I have a backup script which should backup a folder and send it to email. This should be done once a day. As this is on my laptop which is not online 24/7 I need to check that I am online and can send ...
4
votes
1answer
2k views

Setting global environment vars from Python or Bash

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11
votes
2answers
131 views

Bash script to clear files not matching a given extension

Using LaTeX creates a bunch of auxiliary files like foo.aux, foo.log, etc. Sometimes, I want to create a clean run of my ...
8
votes
1answer
251 views

Script for handling PPA's on Ubuntu

I'm writing a bash script to handle the PPA's on Ubuntu & derivatives. I was wondering how to know if I'm handling this the right way. So, the script works (flawlessly), but I posted it to a ...
11
votes
3answers
677 views

Iptables Lockdown

I have nginx serving files with uwsgi and I wanted to lock my server down just to allow SSH and Nginx to run. ...
2
votes
2answers
65 views

Is this an appropriate approach and layout for conditionally continuing execution in bash?

I've seen others use && for conditionally continuing execution in bash, and found it effective but rather ugly. (I'm not sure if there's a better name for this technique.) ...
2
votes
1answer
1k views

Bash pass multiple commands to SSH and make readable

I have a script that sends multiple commands after logging in a remote machine via SSH. Problem is, it's barely readable. I've tried quoting everything with "", but it's terrible (everything appears ...
12
votes
3answers
2k views

Bash script that updates Intel e1000e driver

I am now writing a small bash script that updates an Intel NIC driver to the latest version from the official website. Is there any way to improve\simplify the script? I want to avoid a lot of "if......
8
votes
1answer
764 views

Bash script - automate an upload image + description process on a server

I was tasked at work to improve a system where through a web interface a client, which eventually became us, uploads a bunch of images with descriptions (latter coming from csv files), the images are ...
6
votes
2answers
833 views

Text snippet creator/manager in Bash

Below is a script to create and manage text snippets. It is also posted on GitHub. Most of the code is error checking and displaying help because I wanted to make a solid command line interface. The <...
8
votes
2answers
24k views

Running a shell command and getting output

This is the code I'm currently using to run a shell command on the current machine, intended for use only with GNU/Linux at the moment: ...
8
votes
1answer
1k views

Connecting to EC2 instances using the instance name instead of IP

I'm an intensive user of AWS EC2 instances, many instances are launched, stopped, repurposed, etc. To connect to any instance using SSH I must keep track of their ...
2
votes
1answer
197 views

Ruby install script; packages+installs as a .deb or .rpm from source

Is this bad practice? Also, how can it be improved? ...
10
votes
1answer
111 views

Locating matching files with input folder and file prefix

This is my first more-than-1-line script. It takes an input folder and a file prefix and gets all the matching files. For the first of the files, the script grabs the first line and appends an extra ...
4
votes
2answers
250 views

Mixing function parameters, commands and command arguments in Bash functions

I'm trying to write a bash function that will take a command such as xcode-select -v or brew -v that outputs a lot of extra text,...
4
votes
2answers
271 views

Parallelizing upload

I needed smth that could send (scp/rsync) many files in parallel but that would not overload machine, firewalls on the way by starting e.g. 600 simultaneous uploads, so upload should be done in ...
4
votes
2answers
99 views

Is there a 'better' way to find files from a list in a directory tree

I have created a list of files using find, foundlist.lst. The find command is simply ...
2
votes
1answer
364 views

Bash script to monitor Webserver php script

Below is a script I wrote today to use CURL to monitor the length of various HTTP server outputs and output a response if this is different than 103 characters. This is my first bash script, so I had ...