Additional resources
Shell scripting, much like many other things, requires time and practice to master. It is not something that can be fully learned in a single module. Below are a few valuable resources to help you learn more.
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Heiner's SHELLdorado - UNIX shell scripting resource
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https://www.shellscript.sh/ - basics of shell script
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Shell Scripting Crash Course - Beginner Level - A video guide