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Bash Variables | Types Of Bash Variables - OSTechNix
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Shell Variables - Learning the bash Shell, Second Edition [Book]
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Variable Scopes in Bash - LinuxSimply
Bash Variable Scope | Delft Stack
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Bash Variables: Scripting Reference Guide [with Examples]
Shell programming with bash: by example, by counter-example
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Bash Variables: Scripting Reference Guide [with Examples]
25 Easy Bash Script Examples To Get You Started
Yes, you also need to use `local` on loop control variables | by Leo Gutiérrez | Medium
