For questions relating to shells and kernels.

learn more… | top users | synonyms

16
votes
9answers
2k views

What were the reasons why Windows never had a decent shell? [closed]

I was reading a topic on SO: Why are scripting languages (e.g. ...) not suitable as shell languages?. Especially I liked the answer by Jörg W Mittag, from which I learned interesting things about ...
16
votes
12answers
5k views

Interviewing someone for general unix skills

How would you test a developer that claims to have *nix shell experience (just to be clear, we don't want to test if someone can develop on *nix, only that they know their way around the command ...
10
votes
8answers
4k views

What's shell script's advantage over interpreted programming languages? [closed]

(I'm not sure if it's a appropriate question here) Shell scripts, like those written in bash, can do many things. They can call Unix programs, pipe their output, redirect I/O from/to files, control ...
8
votes
3answers
2k 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. ...
6
votes
3answers
3k views

Difference between a REPL and interactive shell

Noob question. I am not quite able to tell the difference between a REPL and an interactive shell just by reading the definitions on Wikipedia. Wiki notes that REPL is a particular kind of ...
5
votes
2answers
732 views

Functional programming: Writing a small interpreter

I'm working on a small Unix shell, and am contemplating the idea of writing a script interpreter. While reading about the subject I inevitably hear of functional programming, lambda calculus, and find ...
4
votes
2answers
3k views

Why most use Cygwin and not Uwin?

Most academic researchers I know target just *nix, and rely on Cygwin to make their applications available on Windows. I have tried many of these projects and always found them too unstable for ...
3
votes
2answers
232 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 ...
3
votes
6answers
566 views

Is it a bad practice to write shell script with many if-else statment and for loops?

I am maintaing several data process shell scripts which are full of if-else statements and for loops . I try to make the scritps tidy and easy to debug. When I read some suggestions about shell code ...
3
votes
1answer
2k 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?
2
votes
1answer
986 views

Why would I want to use CRaSH?

Justed stumbled across CRaSH and although it looks mighty interesting, I'm wondering why a Java developer should invest time & energy into learning (yet another) shell language. What sort of ...
2
votes
2answers
122 views

Recreating files from shell script or java?

I have java application which takes a file, which is created by a process running on terminal. I start the process using a small shell script. Then run the Java application and it reads the file ...
2
votes
2answers
784 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 ...
2
votes
1answer
1k views

Why no more macro languages?

In this answer to a previous question of mine about scripting languages suitability as shells, DigitalRoss identifies the difference between the macro languages and the "parsed typed" languages in ...
1
vote
2answers
245 views

is there a programming language designed to express data combinations? [closed]

Very often, when using the command line or just programming, you want to express some kind of combination that you end up using a for - which is often verbose. for (int i = 0; i<10; ++i) ...
1
vote
3answers
252 views

What is the best way to store configurations of shell/script code to execute later?

I am working on a tool (Python, may or may not be important) that will allow a user to maintain a configuration file containing arbitrary shell and/or language code to be executed on particular events ...
1
vote
2answers
315 views

DB API for shell scripting (any shell)

I am faced with some legacy shell scripts that run batch data processing jobs in Oracle using SQL+. For the most part, the data tier does not have to communicate back to the script with retrieved ...
0
votes
3answers
787 views

How to set-up a simple subversion workflow

I am trying to set-up a simple SVN workflow at home. I am new to subversion (and programming) so I have been reading the official PDF documentations but still not sure about how to set-up my ...
0
votes
1answer
203 views

Where does the tradition of shell prompts in code snippets come from?

Most code samples I see that demonstrate shell code preface each command with $. Having a prefix makes sense, but I'm confused as to why $ is used in particular. Some other symbol, like !, that can be ...
0
votes
3answers
380 views

Which language is more suitable heavy file tasks?

I need to write a script (based on basic functions) to process /image/audio/video files. The process is mainly filesystem tasks and converts. The database of files has been stored by mysql. The script ...
0
votes
1answer
68 views

How did the “abnormal” options in shell commands appear?

These options which obscure me are like ps aux, route -ee, gcc -fPIC xxx, find . -name xxx and so on. The examples above aren't comprehensive. I.e., I don't think that the argument handle ...
0
votes
1answer
116 views

using pre-commit / post-merge hook script to replace configuration values

I'm having some problem developing a web application with various developers, each one has an specific configuration to work. and i would like to use the less resource cosuming approach to avoid that ...
0
votes
0answers
5 views

How to apply sed here? [migrated]

I have the following string - <ROM readonly="false" persist="false" type="string" name="rom_code_url">ROMCODE_URL_VAL</ROM> Now, I want to replace the the ROMCODE_UR_VAL to the ...
-1
votes
2answers
281 views

When the shell prints “TBD: create a test thread to print info from the Test object”, what does the 'TBD' stand for?

I did this after 'make' for some C++ files, and then running one of them. Does anyone know what the significance of the acronym 'TBD' is?
-2
votes
1answer
114 views

How can I have a shell script log into a remote server and execute imqcmd there? [closed]

I want to write a shell script to connect to the remote server and execute a command (any linux command). I am using linux and want to prepare a shell script which can login to the virtual directory ...
-3
votes
1answer
256 views

C Minishell Command Expansion Printing Gibberish

I'm writing a unix minishell in C, and am at the point where I'm adding command expansion. What I mean by this is that I can nest commands in other commands, for example: $> echo hello $(echo ...
-5
votes
0answers
27 views

script for checking employees login details [closed]

there was this question in a book and i am unable to write a shell script that is upto the mark. the question was: a company owner wants to check the login details of his employees to check if they ...