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Linux in a Nutshell, 6th Edition by Robert Love, Stephen Figgins, Ellen Siever, Arnold Robbins

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Procedures

Procedures consist of one or more commands, function calls, or variable assignments, separated by newlines or semicolons, and are contained within curly braces. Commands fall into five groups:

  • Variable or array assignments

  • Input/Output commands

  • Built-in functions

  • Control-flow commands

  • User-defined functions

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