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1. Advanced Bash-Scripting Guide: Parameter Substitution

   Introduction to parameter substitution in Bash scripting
   
   Different types of parameter substitution:
   - ${parameter}
   - ${parameter-:-word}
   - ${parameter-:=word}
   - ${parameter-:?word}
   - ${parameter-:+word}
   
   - Examples of using parameter substitution, positional parameters and special parameters in Bash

   2024-04-01 Tags: bash, scripting, programming, tldp, advanced bash by klotz

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