POSIX Shell Tricks : https://www.etalabs.net/sh_tricks.html
Better Bash Scripting : https://robertmuth.blogspot.com/2012/08/better-bash-scripting-in-15-minutes.html ## Operating System Development
OSDev.og : https://wiki.osdev.org/Main_Page
The little book about OSdevelopment : https://littleosbook.github.io/#the-operating-system
The Art of Assembly Language : http://flint.cs.yale.edu/cs422/doc/art-of-asm/pdf/
OS Tutorial : https://github.com/cfenollosa/os-tutorial
Toy UNIX-clone OS : http://www.jamesmolloy.co.uk/tutorial_html/
Raspberry Pi OS : https://jsandler18.github.io/
AVR OS : http://www.femtoos.org/
C20 Standard : http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf
POSIX.1-2017 : https://pubs.opengroup.org/onlinepubs/9699919799/toc.htm
Operating Systems: Three Easy Pieces : http://pages.cs.wisc.edu/~remzi/OSTEP/