Thomas Touhey

Latest posts

Metadata at your fingertips! (finger)
published on the 09/12/2018
Learn about finger, a forgotten Internet protocol allowing you to find out who is logged in on a server!
OpenSSH Public Key Authentication
published on the 07/16/2017
Ever wondered how to authenticate on a custom SSH shell using the user's public key? You're at the right place!
Why the Unix return code is an int
published on the 06/03/2017
Ever wondered why in C, main() returns an int? Here's my answer to that question!
Linux on the Thinkpad 750C
published on the 05/22/2017
How did people back in the 90s installed Linux on their machines? Here's how I did on a PC from 1993, the IBM Thinkpad 750C!
stdarg.h and its secrets
published on the 05/15/2017
How much do you know about `stdarg.h`? This post will give you some clues about how what's in it works.
Make a shell service, like in the 80s!
published on the 12/14/2016
Ever wanted to make a shell service, just because it's cool ? Here's how I did mine!
fopencookie - make your own filestreams!
published on the 10/30/2016
Ever wondered if you could customize libc FILE streams? Here's how to do it with the GNU libc!