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- Newsgroups: comp.infosystems.gis
- Date: Mon, 21 Dec 1992 12:40:15 EST
- Reply-To: rparry@hydrolab.arsusda.gov
- Sender: Geographic Information Systems Discussion List <GIS-L@UBVM.BITNET>
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- From: Rob Parry <rparry@HYDROLAB.ARSUSDA.GOV>
- Subject: Re: FTP
- Lines: 38
-
- In Message Mon, 21 Dec 1992 11:08:01 EST,
- Mark Heinicke <mark@GEOG5.UMD.EDU> writes:
-
- >More on compressed files (re: Jay Morgan) after reading Duane Marble's
- >reply to same: uuencode is used to convert binary file into ASCII file
- >that can be sent by mail; uudecode converts back into binary. An ftp'ed
- >file might be ASCII *or* binary. What you might have is something
- >that was first compressed in Unix via "compress"--leaving a "[something].Z"
- >file, then "uuencoded" into ASCII form (and would probably have a
- >".Z" suffix at discretion of user), in which case it would first have to
- >be "uudecoded" and then uncompressed (into into its binary form, if that's
- >what it was). How this is done on PC's I dunno.
- >
-
- Pretty much the same, except on a PC, one would use a zipping program
- instead of a compress program (unless you wanted to be UNIX compatable)
-
- There are compress programs for the PC & Zip programs for UNIX so it is
- possible to be compatable both ways, its your choice. The nice thing about
- zipping is that is can compress more than one file in an archive, whereas
- compress cannot. You will often see Unix files on an ftp site:
-
- utility.tar.Z
-
- which means all the files with utility have been put together in a single
- tar file (giving the .tar extension) and then compressed (giving the .Z)
-
- If you only work with Unix, stick with tar & compress. Get to know them
- well - you will use them a lot.
-
- Rob
-
-
- ----------------------------------------------------------
- Rob Parry rparry@hydrolab.arsusda.gov
- USDA-ARS-Hydrology Lab Phone: (301) 504-8625
- Beltsville, MD FAX: (301) 504-8931
- ----------------------------------------------------------
-