Unix filesystem: Difference between revisions

Revision as of 07:19, 26 October 2023

Revision as of 20:30, 29 January 2024

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:<code>/usr</code>

|The "user file system": originally the directory holding user home directories,<ref name="notes72"/> but already by the Third Edition of [[Research Unix]], ca. 1973, reused to split the operating system's programs over two disks (one of them a 256K fixed-head drive) so that basic commands would either appear in <code>/bin</code> or <code>/usr/bin</code>.<ref name="reader">[[{{cite web |author-link=Doug McIlroy |author=M. D. McIlroy]] (|date=1987). [|url=http://www.cs.dartmouth.edu/~doug/reader.pdf |title=A Research Unix reader: annotated excerpts from the Programmer's Manual, 1971–1986]. |id=CSTR 139, |publisher=Bell Labs.}}</ref> It now holds executables, libraries, and shared resources that are not system critical, such as the [[X Window System]], [[window manager]]s, [[scripting language]]s, etc. In older Unix systems, user home directories might still appear in <code>/usr</code> alongside directories containing programs, although by 1984 this depended on local customs.<ref name="upe"/>

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