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This skill provides production-ready shell script templates for common Linux system administration tasks such as backups, monitoring, user management, and log analysis. It serves as a foundation for security operations and penetration testing environments, requiring basic bash knowledge and appropriate system permissions.

A comprehensive workflow bundle designed for system administrators and developers. It guides users through the entire lifecycle of system management and shell scripting across Linux, macOS, and Windows. Key phases include environment assessment, writing robust Bash scripts, advanced debugging techniques, linting with ShellCheck, and rigorous test automation using Bats, ensuring scalable and reliable automation.

This skill provides expertise in writing strict POSIX-compliant shell scripts for maximum portability across Unix-like systems. It focuses on shell-agnostic scripting compatible with dash, ash, sh, and bash in POSIX mode. Key areas include defensive programming, portable error handling, safe argument parsing, and cross-platform compatibility. It ensures scripts run on Linux, BSD, Solaris, AIX, and macOS without relying on GNU-specific features or bash extensions.

This skill covers critical PowerShell Windows patterns including operator syntax rules, null checks, error handling, and file path management. It emphasizes avoiding common pitfalls like missing parentheses, Unicode characters, and type mismatches to ensure robust script execution.