POSIX (Portable Operating System Interface)
POSIX is a set of standards defined by the IEEE Computer Society to ensure compatibility and portability across Unix-like operating systems (e.g. Linux) and other platforms.
Examples:
- System Interfaces: APIs for file operations, process management, threads, and networking.
- Shell and Utilities: Standard behavior for command-line tools (e.g., ls, grep) and shells like bash.
- Real-Time Extensions: Features for real-time applications, such as precise timing controls.
- Standard Tools: Ensures consistent behavior of tools like awk, sed, and bash.
Window Windows is partially POSIX-compliant but not fully compliant like Linux or certified Unix systems. Instead, Microsoft introduced the Windows Subsystem for Linux (WSL), which allows running Linux distributions (e.g., Ubuntu) on Windows. WSL provides a Linux-compatible kernel interface, effectively supporting POSIX-compliant applications indirectly through a Linux environment.