Jim Hall

5850 points

Minnesota

Jim Hall is an open source software advocate and developer, best known for usability testing in GNOME and as the founder + project coordinator of FreeDOS. At work, Jim is CEO of Hallmentum, an IT executive consulting company that provides hands-on IT Leadership training, workshops, and coaching.

Open Sourcerer People's Choice Award People's Choice Award 2018 Author Linux Contributor Club

Authored Content

Business woman on laptop sitting in front of window

How to (safely) read user input with the getline function

Getline offers a more flexible way to read user data into your program without breaking the system.

Parsing data with strtok in C

The strtok function is a handy way to read and interpret data from strings. Use it in your next project to simplify how you read data into your program.

The original C programming guide by two of the language authors, circa 1978

How the C programming language has grown

Here's my interview with Brian Kernighan, co-author (with Dennis Ritchie) of The C Programming Language book, to discuss the C programming language and its 50-year history.

Talking digital with Brian Kernighan

Brian Kernighan shares his inspiration and research behind the latest edition of his book, Understanding the Digital World.

Linux keys on the keyboard for a desktop computer

Solve Wordle using the Linux command line

Use the Linux grep and fgrep commands to win your favorite word-based guessing games.

Puzzle pieces coming together to form a computer screen

Try FreeDOS in 2022

15 resources for new users and longtime fans of this free operating system.

Authored Comments

Jim Hall

28 Jun 2021

How to archive files on FreeDOS

Zip is an open standard, and *.zip files are also supported on Linux (and Windows). The *.zip files you create on FreeDOS can be opened on those other platforms, too. And vice versa.

Jim Hall

25 Jun 2021

How to program in C on FreeDOS

If you liked this article and you're new to C programming, you might be interested in the "C programming" YouTube series I recorded last year. You can find it on the FreeDOS website under "books" as "Writing FreeDOS programs in C":
https://www.freedos.org/books/cprogramming/

And if you're already experienced in C programming, you might like to see this video demonstrating several common programming bugs:
https://www.youtube.com/watch?v=dUM_AJ8VEl0