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  1. 1
    cp's -r vs -R flag debate resurfaces●cp: -r or -R?Yhn992 min ago

    A blog post by developer movq examines a long-standing quirk of the Unix cp command: whether the recursive copy option should be written as lowercase -r or uppercase -R. The two flags have subtly different histories across BSD, GNU and POSIX systems, and the piece walks through what each specification actually guarantees, reigniting a familiar argument among command-line users.

  2. 2
    SDF, the internet's oldest public access Unix system, endures●SDF Public Access Unix System ... est. 1987YhnScienceSpace Policy10551 min ago

    SDF, the public access Unix system founded in 1987, is drawing renewed attention as one of the longest-running community computing platforms still online. Users praise it as a living piece of internet history, offering free Unix shell accounts, forums and retro services maintained by volunteers for nearly four decades.

  3. 3
    Hidden Fibonacci computation found inside macOS top command●A parasitic Fibonacci computation inside /usr/bin/top https://seriot.ch/computation/terminfo/ # HackerNews # Tech # ProgMmastodonTechnology31 h ago

    Security researcher Nicolas Seriot documents how /usr/bin/top, the macOS system monitor, ends up performing an unnecessary Fibonacci-style recursive computation through terminal capability string parsing, meaning the utility wastes CPU cycles every time it runs. The write-up walks through the terminfo parsing chain that triggers the hidden workload. Developers are sharing the finding as a striking example of obscure, parasitic computation lurking in everyday Unix tools.

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