May 15, 2003

cat

vt.

[from catenate via Unix cat1]

1. [techspeak] To spew an entire file to the screen or some other output sink without pause (syn. blast).

2. By extension, to dump large amounts of data at an unprepared target or with no intention of browsing it carefully. Usage: considered silly. Rare outside Unix sites. See also dd, BLT.

Among Unix fans, cat1 is considered an excellent example of user-interface design, because it delivers the file contents without such verbosity as spacing or headers between the files, and because it does not require the files to consist of lines of text, but works with any sort of data.

Among Unix haters, cat1 is considered the canonical example of bad user-interface design, because of its woefully unobvious name. It is far more often used to blast a file to standard output than to concatenate two files. The name cat for the former operation is just as unintuitive as, say, LISP's cdr.

Of such oppositions are holy wars made.... See also UUOC.

Posted by Jargon File at May 15, 2003 10:54 AM

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