[ILUG-BOM] zip

[Philip S Tellis]

Sometime on Jan 16, Trevor Warren assembled some asciibets to say:

>  philip........did he say atr or zip....:-/

It doesn't matter.  on linux, both zip and tar/gzip work.  on windows,
Winzip can handle zip as well as .tar.gz files.

besides, tar-gzip gives better compression than just zipping.
No, it has nothing to do with the algorithms used, just the order.

zip does a compress first, concat second, tar | gzip does the tar -
concat first, and compress second.

doing the concatenation first increases the entropy in the file, making
it a better compressible.

compression is an entropy reducing process (and as such contributes to
the longevity of the universe), and therefore, the more entropy present
initially, the better the compression.

Philip

-- 
The first requisite for immortality is death.
		-- Stanislaw Lem