Message-Id: <199710091423.HAA29476@dns.ccit.arizona.edu> Date: Thu, 9 Oct 1997 09:13:51 -0600 From: Sean Fox <mailto:sfox@CARLETON.EDU> Subject: Re: . Digitization standards To: mailto:IMAGELIB@LISTSERV.ARIZONA.EDU
>Hi,
>
>I need some help in letting me know what type of file format is the file
>with an extension "tgz", I have downloaded a file obvius.tgz from
>http://www.cs.cmu.edu/, but now I do not know how to handle the same.
>
tgz is often sometimes shorthand for tar.gz, which means that a collection of files has been combined into one file (using the UNIX tar command) and the resultant file has been compress using the GNUZip utility (again, a common UNIX tool which is NOT equivalent to the standard PC "pkzip" format).
Normally one would take such a file to a UNIX machine and run the following sequence of commands:
gunzip obvius.tgz
This would probably create a file called obvius.tar, which could then be pulled apart using something like:
tar -xvf obvious.tar
The result would be a collection of files and directories. If you're working in a UNIX enviroment your sysadmin should be able to help you with that. If you're not working in a UNIX enviroment, it might be worth finding out what "obvius.tgz" is supposed to contain and whether it will work with whatever hardware/software you do have. If it will then it's time to enlist help from some local UNIX guru's, or start looking for utilities that will deal with these formats on your computer. (Utilities for dealing with these two unix formats do exist for non-UNIX computers....)
Then again .tgz could stand for something entirely different in this context, but given it's origin--CMU's CS department, I suspect it is as I've described.
Sean Fox Academic Computing Coordinator Carleton College mailto:sfox@carleton.edu