This document discusses and compares international and North American electrical standards. It provides an overview of standards organizations like IEC, UL, and ANSI and their respective standards. Key points covered include test sequences defined in standards like IEC 947-2, UL 489, and ANSI C37-50. The document also outlines requirements for circuit breakers, like short circuit and overload testing, and notes both standards ensure safety while allowing for different cultural and historical approaches.
The document discusses shell scripting and provides examples of common shell scripting concepts and commands. It covers topics such as variables, conditionals, loops, functions, command execution, pipes, redirection, and here documents. Examples are provided to demonstrate how to write shell scripts using these different concepts and commands like echo, expr, case, if/else, for/while loops, functions, and more. The goal is to explain the basics of shell scripting through examples and outlines.
This document discusses and compares international and North American electrical standards. It provides an overview of standards organizations like IEC, UL, and ANSI and their respective standards. Key points covered include test sequences defined in standards like IEC 947-2, UL 489, and ANSI C37-50. The document also outlines requirements for circuit breakers, like short circuit and overload testing, and notes both standards ensure safety while allowing for different cultural and historical approaches.
The document discusses shell scripting and provides examples of common shell scripting concepts and commands. It covers topics such as variables, conditionals, loops, functions, command execution, pipes, redirection, and here documents. Examples are provided to demonstrate how to write shell scripts using these different concepts and commands like echo, expr, case, if/else, for/while loops, functions, and more. The goal is to explain the basics of shell scripting through examples and outlines.