bash variable - SERP Analysis

https://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO-5.html

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https://www.w3schools.com/bash/bash_variables.php

https://www.geeksforgeeks.org/bash-script-define-bash-variables-and-its-types/

https://www.gnu.org/software/bash/manual/html_node/Bash-Variables.html

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https://labex.io/tutorials/shell-how-to-use-bash-variables-effectively-394872

https://unix.stackexchange.com/questions/487683/temporarily-declare-a-variable-in-bash