Hi Greg,

/bin/zcat is just another flavor of /bin/uncompress ...

http://invent3k.external.hp.com/~MGR.LROM3K/man3k/zcat.html


Yes, gzip and gunzip (or gzip -d) are part of the GNU core.

http://jazz.external.hp.com/src/gnu/gnuframe.html


If you just want the gzip programs and not the whole GNU
core package, you can also download those two here ...

http://www.editcorp.com/personal/lars_appel/WebKit2/upload/gnuzip.tar.Z


One thing that can be convenient with compress compared
to gzip is the fact that the MPE/iX tar utility in /bin/tar
can invoke compress or uncompress by adding the -z option
to your tar -c (create) or tar -x (extract) commands.

For example to unpack the above mentioned gnuzip.tar.Z file,
you could use several slightly different command invocations:

  $ uncompress gnuzip.tar.Z ; tar -xvopf gnuzip.tar
or
  $ zcat gnuzip.tar.Z | tar -xvopf -
or
  $ uncompress -c gnuzip.tar.Z | tar -xvopf -
or
  $ tar -xvzopf gnuzip.tar.Z   # my favourite ;-)


Oh, to add another compression utility to the mix, there is
also the well known zip/unzip tool available for MPE/iX, which
is based on the InfoZIP freeware and compatible with PKZIP or
WINZIP and lots of similar tools (frequently used in Windows).

http://www.editcorp.com/personal/lars_appel/WebKit2/upload/gnuzip.tar.Z

(based on an older version of http://www.info-zip.org/pub/infozip/ )

Unlike compress and gzip, the zip tools do not just provide
compression, but also allow to archive a number of files into
a single archive (like the combo of tar+compress or tar+gzip
does, from a functional point of view).


Regards, Lars.

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