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@jschauma.mstdn.social.ap.brid.gy Sep 16, 2026, 8:49 PM

Advanced Programming in the #UNIX Environment

Week 2: File Descriptors

To introduce the concept of file descriptors, let's start with a simple question: how many file descriptors can a unix process open? Finding the answer helps us introduce a few different […]

[Original post on mstdn.social]

Presentation slides showing an illustration of file descriptors connected from the terminal to a single program as well as to two programs in a pipe.

Additional bullet points:
A file descriptor (or file handle) is a small, non-negative integer which identifies a file to the kernel.

Traditionally, stdin, stdout and stderr are 0, 1 and 2, respectively, but relying on magic numbers is bad practice. Use STDIN_FILENO, STDOUT_FILENO, and STDERR_FILENO instead.

@lobsters-feed.bsky.social Sep 16, 2026, 4:46 PM

The early days of UNIX in the UK https://lobste.rs/s/ssg1jp #unix #historical #editors

@hackmag.com Sep 16, 2026, 12:30 PM

🟢 Getting Started with Radare2: An Open-Source Framework for Linux Application Analysis 🗨️ If you have never used Radare2, you have probably at least heard of it: it is an open-source toolkit for program analysi… #unix

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Agent State in the Tmux Status Line https://lobste.rs/s/rwzf83 #unix

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🟢 How to Set Up Parental Controls on Linux for Kids 🗨️ If you have children, you know that nowadays the usual list of parenting duties inevitably includes one more: pulling yo… #unix

@gp-pulipaka.bsky.social Sep 15, 2026, 6:00 PM

Top #UNIX/ #Linux #Books For Beginners! #BigData #Analytics #DataScience #IoT #IIoT #PyTorch #Python #RStats #TensorFlow #Java #JavaScript #ReactJS #GoLang #CloudComputing #Serverless #DataScientist #Linux #Books #Programming #Coding #100DaysofCode
geni.us/Unix-Linux-B...

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Programming Joke of the Day: Sep 15, 2026 #programming #programminghumor #programmingjokes #unix #linux #javascript

@linuxiarze.bsky.social Sep 15, 2026, 11:37 AM

jEdit to edytor tekstu dla programistów, którego rozwój poprzedziły setki (licząc czas poświęcony na tworzenie wtyczek) osobolat. Chociaż jEdit przewyższa wiele drogich narzędzi programistycznych pod względem funkcjonalności... biznes.linuxiarze.pl/jedit/ #texteditor #linux #osx #windows #os2 #unix

@lobsters-feed.bsky.social Sep 15, 2026, 9:06 AM

Coreutils - rejected feature requests https://lobste.rs/s/zbcua4 #unix #programming

@olaf.social.secret-wg.org.ap.brid.gy Sep 15, 2026, 7:27 AM

From my #LinkLog:

Evolution of the Unix System Architecture: An Exploratory Case Study

Unix history, nice read

Logged on 2026 September 15 - 07:27 UTC from: https://ieeexplore.ieee.org/document/8704965

#UNIX #history

@the-archive.bsky.social Sep 15, 2026, 4:22 AM

Author: Dave Eddy bahamas10_
Effortlessly Summarize Data with Field and Total Commands In Bash Using AWK! i love awk. you suck at programming #programming #devops #bash #linux #unix #software #terminal #shellscripting #tech #stem

@the-archive.bsky.social Sep 15, 2026, 2:22 AM

Author: Dave Eddy bahamas10_
iTerm vs. macOS Terminals - My Personal Choice it Terminal Emulators. you suck at programming #programming #devops #bash #linux #unix #software #terminal #shellscripting #tech #stem