Questions tagged [bash]
Bash is the shell from the GNU project. It is the standard shell on many Linux distributions and often available on other *NIXes.
38 questions
-2
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0
answers
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Does an indentation style which uniquely identifies a column position to its role in the construct it belongs to make Bash code more readable? [closed]
I've just opened a relatively similar question
(why nobody indents Bash?)
on Stack Overflow.
What I'm asking here is whether do you think the facts
there is no type enforcing;
there is no indentation ...
2
votes
1
answer
244
views
Choosing test method of bash command output with bats
Context
While writing a bash script I would like to test every command I write. To do so I create a separate function per command that executes the function. In addition I want to log the output of ...
- 225
-1
votes
2
answers
110
views
commonly used practices for deploying package primarily composed of bash scripts
I am working on a tool that primarily uses bash scripts and C++ code.
Generally I have experience with basic tools written in C and C++ in which we can have a build system like ./configure; make; ...
- 107
-1
votes
1
answer
673
views
Shell Script does not capture values inside ENDSSH
I am very new to writing Shell scripts and am trying to write a simple script to run Vagrant up then SSH into the box and run some commands. The echo Hi there will run but the read -p will never show. ...
- 109
0
votes
1
answer
394
views
If statement best practice [duplicate]
I am reviewing best practice with if statements. Below in example A I include the entire code to be run and ensure it remains within the if statement. While for example B the code to be executed ...
- 103
2
votes
1
answer
99
views
How can I maintain bash functions without brittle escaped newlines?
I have functions like this:
foo() {
/some/script \
--opt1=val1 \
--opt2=val2 \
--opt3=val3
}
This is brittle if I take out the last option, or add any new option at any line. ...
- 2,212
2
votes
3
answers
2k
views
Is it pythonic to replace a bash script with series of subprocess calls
I have a pretty simple bash script which consists of a bunch of one liners and some simple logic.
Its been recommended that I rip the bash script apart and rewrite it all in python using subprocess. ...
- 341
6
votes
2
answers
438
views
Anything wrong with having aliases on a production server?
On my local server, I create aliases like these to speed up my work:
alias bashrc='vi ~/.bashrc;source ~/.bashrc;echo bashrc has been sourced'
alias bashprofile='vi ~/.bash_profile;source ~/....
- 1,191
13
votes
5
answers
4k
views
How should I version control my bash profile?
So I'm very comfortable with version control, and just thought to start tracking versions of my bash profile: ~/.bash_profile with the added benefit of being able to share my various aliases and such ...
- 141
23
votes
2
answers
17k
views
Share private SSH keys with Bash on Windows
I have Windows 10 with Git installed. This Git uses my C:/Users/MyName dir as the HOME directory and the /.ssh/ dir within, appropriately for sourcing my private SSH keys.
I have just enabled and ...
- 595
0
votes
1
answer
392
views
Pcregrep vs Perl vs Python for bash scripting when needing advanced regex features [closed]
I've lately been using pcregrep to do Perl-style group matching when doing my bash scripts.
The problem with pcregrep is that it's not readily available on Linux machines in general.
An alternative ...
- 592
2
votes
2
answers
2k
views
git clone vs cp -R
I want to use an existing project as a starting point for a new project by copying or cloning it.
There are at least two ways of doing this.
Method 1: Copy it.
cp -R /path/to/source /path/to/dest
...
- 189
2
votes
0
answers
242
views
Implementing redundant GIT backup scheme
I want to push a local repo to multiple remote GIT repositories to achieve redundancy in my backup scheme. So, let's say I plan to use Github and BitBucket to host my repositories.
I have two ...
- 189
2
votes
2
answers
162
views
Ideas on processing input text file in parallel by Bash script
I have a Bash script that processes files read from standard input, one pathname per line, and runs a CPU intensive task on each file. I happened to notice that even with four cores (grep -c ^...
- 131
-1
votes
2
answers
360
views
Extensible way to create bash program
I have a bash script that should be extensible with additional functions with as little change to the script as possible.
The basic function is as follows. It loops through a list of files to check. ...
- 15
5
votes
4
answers
1k
views
Shell commands in bash or python? How much encapsulation is too much?
I'm thinking about how to decide whether it's better to encapsulate my work behind well-named function names, or to expose it - which will help developers understand what's going on more quickly? Is ...
- 533
2
votes
1
answer
2k
views
Why should I use a Dockerfile instead of a batch script?
I'm new to Docker and feeling my way around. My plan is to build a typical web app using Nginx+Rails+Postgress, all of which will be in the one container. I'm not (currently) doing anything complex ...
ukosteopath
0
votes
0
answers
1k
views
Best practices to prevent DoS attack, PHP running bash script on apache server
I have a PHP page the sole purpose of which is to spawn a bash script to run some background code (10-15 seconds run time), and then forward to a second page. The second page waits for the background ...
- 109
0
votes
1
answer
222
views
Unix way of filtering/mapping/mapcatting records via the pipeline?
At home I use Linux and have for more than a decade. At work we use Windows and so I find PowerShell more familiar. I am a Linux/Unix fanboy at heart, but I've had greater success grokking the ...
- 1,738
2
votes
1
answer
637
views
One Script file or Multiple Script Files [closed]
I have a moderately long(for me at least) bash script file that that maintains a list of LAN users and the bandwidth each one uses. It is 199 lines with 11 functions and is already calling 3 different ...
- 23
0
votes
1
answer
288
views
Need advise for porting linux script to Win command line [closed]
I am creating app(script) that is used similar to RSS reader for specific webpage that doesn't have RSS.
So my app downloads that html page in defined intervals, checks new items and parses them into ...
- 119
14
votes
3
answers
692
views
When is it appropriate to use colour in a command-line application?
Currently I have a command-line application in C called btcwatch. It has a -C option that it can receive as an argument that compares the current price of Bitcoin with a price that was stored ...
3
votes
3
answers
2k
views
Recommended guidelines for declaring bash/sh variables
I have been programming in BASH for a while now and the scripts that I write are starting to get more complicated.
I realized that I started to bring in some habits from C/C++ and wanted to get ...
- 145
1
vote
1
answer
8k
views
Encoding a bash script for use in Python
I am writing some code in Python which checks for the validity of a license key after polling a server. If it is valid then the Python program in turn runs some bash scripts.
How to create a ...
- 119
6
votes
2
answers
1k
views
Is bash "finished"? [closed]
Should bash be expected to change in ways that break non-trivial amounts of existing scripts at some point in the (near/<5y) future? How much change has it gone trough in the last ten years ...
user46637
1
vote
2
answers
366
views
Need some advice and feedback on my code's design
I am looking for feedback on the design of my program.
I have a shell script call function.sh that defines a lot of helper functions. My intent is to use those bash functions defined in functions.sh ...
- 21
11
votes
1
answer
11k
views
Is it possible to use python as a shell replacement? [duplicate]
Recently I was looking at python's shutil and subprocess etc... And I started wondering: wouldn't it be ok to use python instead of e.g. bash?
What am I missing?
- 344
1
vote
1
answer
427
views
How do global cancel/exit commands work in bash?
As I have done multiple times before, I've written bash scripts, and just general commands that go nowhere. They just blink the little command line cursor at me for infinity until I control+C the ...
- 63
2
votes
1
answer
379
views
Effective handling of variables in non-object oriented programming
What is the best method to use and share variables between functions in non object-oriented program languages?
Let's say that I use 10 parameters from DB, ID and 9 other values linked to it. I need to ...
- 355
1
vote
1
answer
2k
views
Heredoc or an external template file in my bash script - how it affects readibility/maintanance?
I realise that this question may be down to personal preference but I'm pretty new to Bash / shell scripting so thought it'd be worth some research to see if there's some sort of standard/best ...
- 185
13
votes
3
answers
4k
views
User Configuration of a Shell Script. Best practices?
I am writing a shell script with a few variables that should be configured by the user. There will be an installer for downloading and configuring the script, possibly by asking a series of question. ...
1
vote
1
answer
334
views
Do accompanying tools/scripts also need to be licensed to put my bash script under GPLv3?
This is some sort of follow up to an older question of me.
So I put the GPLv3 license into the project which contains my script and also added the copyright notice and copying permission statement to ...
- 2,448
7
votes
1
answer
3k
views
Are these steps enough to put my bash script under GPL 3?
I have written a bash script I would like to put under GPL v3. I've read the GNU documentation
on How to Apply These Terms to Your New Programs and How to use GNU licenses for your own software. Still,...
- 2,448
4
votes
2
answers
413
views
Are "backwards" terminators for if and case unique to shell scripting?
In bash at least, if and case blocks are closed like this:
if some-expr
then
echo "hello world"
fi
case $some-var in
[1-5])
do-a-thing
;;
*)
do-another-thing
esac
as opposed to the ...
- 143
10
votes
5
answers
6k
views
Improving performance for grepping over a huge file
I have FILE_A which has over 300,000 lines and FILE_B which has over 30 million lines. I created a Bash script that greps each line in FILE_A over in FILE_B and writes the result of the grep to a new ...
- 103
6
votes
6
answers
3k
views
PHP as a scripting language [closed]
I have reasonable knowledge of PHP, Perl, and Bash. I use Perl for most text processing on my system (find, replace, filter output, etc). I use PHP for web development, allowing a user to view and ...
- 1,533
11
votes
5
answers
5k
views
Is it good practice to require a trailing forward slash in directory names?
I want to ask the user of my bash script to pass a directory path as argument. Which one of the following is a good programming practice?
Require that the user enter a trailing / (forward slash)
...
- 343
56
votes
16
answers
51k
views
Why such popularity with Python? [closed]
Other than being annoyed at whitespace as syntax, I'm not a hater, I just don't get the fascination with Python.
I appreciate the poetry of Perl, and have programmed beautiful web services in bash &...