Design
KornShell complies with POSIX.2, Shell and Utilities, Command Interpreter (IEEE Std 1003.2-1992.)
Major differences between KornShell and the traditional Bourne shell include:
- Job control, command aliasing, and command history designed after the corresponding C shell features;
- Three WYSIWYG-style line editing modes designed to make an interactive shell session behave like vi, Emacs, or XEmacs;
- Associative arrays and built-in floating point arithmetic operations (only available in the ksh93 version of KornShell.)
Read more about this topic: Korn Shell
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—François, Duc De La Rochefoucauld (1613–1680)
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—Karl Lagerfeld (b. 1938)