unix50:~$ ls challenges

Welcome

The Unix Game is a fun, low-barrier-to-entry programming contest where players solve coding challenges by constructing "pipelines" of UNIX text processing utilities to compute the solution. Press the button below to take a quick tour around the UI:

Check the leaderboard to see how you compare against other players. You can download a badge of honor from your profile page to showcase your progress to your friends.

Are you ready to crack your first question?

Warm-up: UNIX at Bell Labs

In this first challenge you are given a file containing the names of Bell Labs staff that made key technical contributions to UNIX, based on a list from Michael S. Mahoney, Professor of History at Princeton.

Here are the first 5 lines in the file:

Ken Thompson
Dennis Ritchie
Joe Osanna
Bob Morris
Doug McIlroy

Click on each question below to find out what you're asked to do with this file.

unix50:~/challenges/hello_world$ ls questions

Extract the last name of each person and sort the list of last names in alphabetical order.

We have already provided the command to extract the last name. Can you find the command to sort lines?

When you're happy with your code, press the 'Submit' button to validate your solution.