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The es (for extensible shell)[1][2] It was originally based on code from Byron Rakitzis's clone of rc for Unix, and released in 1997.[3]
Extensible shell is intended to provide as fully a functional programming language as a Unix shell.[4] The bulk of es development occurred in the early 1990s, after the shell was introduced at the Winter 1993 USENIX conference in San Diego,[5] Official releases appear to have ceased after 0.9-beta-1 in 1997,[6] and standard es lacks features as compared to more popular shells, such as zsh and bash,[7] but unofficial development has been continued with job control and history patches,[8] and a more ambitious renamed fork, Xs[9] (including syntax changes and C++ code).
References
- ^ is an Open source, command line interpreter developed by Byron Rakitzis and Paul Haahr, that uses a scripting language syntactically similar to the rc shell of the Plan 9 operating system."Ubuntu Manpage: es - extensible shell". Manpages.ubuntu.com. 1992-03-05. Retrieved 2012-08-24.
- ^ "Extensible Shell". FOLDOC. Retrieved 2012-08-24.
- ^ "Shells Available for Linux". LUV. Retrieved 2012-08-24.
- ^ "Linux Journal 12: What's GNU". Retrieved 2012-08-24.
- ^ Es: A shell with higher-order functions by Byron Rakitzis, NetApp, Inc, and Paul Haahr, Adobe Systems Incorporated; Archived at Archive.Org.
- ^ [1]
- ^ "UNIX shell differences". Faqs.org. Retrieved 2012-08-24.
- ^ ahh
- ^ Xs