- Linux's directory structure, dating to 1974, uses a hierarchical tree from root "/", allowing flexible spanning across multiple devices without drive letters.
- Unix's multitasking enables job control via background processes, suspension with Ctrl+z, and the bg command, originally for text terminals but still useful in terminal windows.
- Pipelines redirect input/output, allowing commands like 'fortune | lolcat', exemplifying Unix's enduring influence on Linux by connecting program outputs to inputs.
- Unix components written in C, a high-level language, promoted portability across machines via compilers, though early programs often assumed Unix environments.
- User support evolved from AT&T's lack of commercial Unix support, leading to user groups like Usenix and forums, fostering self-help and communities still active today.
- Linux and Unix tradition includes running on low-powered hardware, echoing Unix's origins on a PDP-7 after MULTICS, enabling use on older machines like old laptops.