Скачать или смотреть Linux, if conditional operators, Test command, Case command, expr, computatuion, string handling

Mastering Shell Scripting; Linux Shell Scripting: Conditionals, Testing, and Operations.
Linux, The if conditional operators, Test command, The Case command, expr, computatuion and string handling.
The provided source offers a comprehensive guide to Linux shell scripting fundamentals, focusing on conditional logic, comparisons, and basic operations. It thoroughly explains the if statement, test command, case command, and expr utility, detailing their syntax, practical applications, and troubleshooting tips. The document is structured to assist Linux administrators and DevOps engineers in developing robust scripts, covering key concepts relevant for both day-to-day tasks and interview preparation, with an emphasis on file existence checks, multi-condition logic, arithmetic, and string manipulation.

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