I dutifully refer you to the ancient texts: Advanced Bash-Scripting Guide <https://tldp.org/LDP/abs/html/abs-guide.html https://tldp.org/LDP/abs/html/abs-guide

I dutifully refer you to the ancient texts: Advanced Bash-Scripting Guide <https://tldp.org/LDP/abs/html/abs-guide.html https://tldp.org/LDP/abs/html/abs-guide.html> Bash Guide for Beginners <https://tldp.org/LDP/Bash-Beginners-Guide/html/Bash-Beginners-Guide.html https://tldp.org/LDP/Bash-Beginners-Guide/html/Bash-Beginner...>