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Full Discussion: Gzip help
Top Forums Shell Programming and Scripting Gzip help Post 302179379 by era on Thursday 27th of March 2008 02:12:39 PM
Old 03-27-2008
The tar command-line options are a drag. Use cf to create a new tar and xf to extract. Conventionally you don't have a dash in front, but if you also use some options, you need dashes all over. It's weird and not funny at all.

Don't touch a new file first, just let tar create it on its own.

Code:
tar cf file.tar list of files to tar even/with path/names if/you/like
tar xvf file.tar # to extract; v means print while extracting
tar tvf file.tar  # to just print
tar -z -c -v -f file.tar.gz  /home/me # or equivalently tar zxvf file.tar.gz /home/me
tar -C /home/you -c -f file.tar . # -C is only available as an option, so must use dashes throughout
tar jcvf file.tar.bz2 . # older tars don't have this -- use bzip2 instead of gzip

Part of the reason (or at least explanation) is that tar was originally meant for manipulating tape archives, and using it on files is kind of a special case historically.

Hope this helps.
Last edited by era; 03-27-2008 at 03:16 PM.. Reason: Minor edits
 

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LEARN ABOUT CENTOS

bf_tar

BF_TAR(1)						    Bogofilter Reference Manual 						 BF_TAR(1)

NAME

       bf_tar - shell script to write a tar file of a bogofilter directory to stdout

SYNOPSIS

       bf_tar [-r] [-R] bogofilter_directory

DESCRIPTION

       bf_tar bundles a bogofilter working directory in tar format and copies it to standard output (your console, or where you redirect it, see
       EXAMPLES below).

OPTIONS

       The -r option causes bf_tar to remove inactive log files after the archive has been written successfully. The default is to leave log
       files.

       The -R option causes bf_tar to remove inactive log files before the archive is written. This may reduce chances that the resulting archive
       is recoverable should it become damaged. The archive may be smaller though. The default is to leave log files.

EXIT STATUS

       The script exits with status code 0 if everything went well, and nonzero if it encountered trouble.

EXAMPLES

       o   bf_tar ~/.bogofilter > outfile.tar

	   Writes a standard .tar file containing the essential files from ~/.bogofilter to outfile.tar.

       o   bf_tar ~/.bogofilter | gzip -9 -c > outfile.tar.gz

	   Writes a gzipped .tar.gz file containing the essential files from ~/.bogofilter to outfile.tar.gz.

       o   bf_tar `pwd`/mydirectory > outfile.tar

	   Prepend $(pwd)/ or `pwd`/ if you want to specify an absolute path instead of a relative path.

NOTES

       This script is meant for use with Berkeley DB based bogofilter versions.

       This script requires a SUSv2 compliant pax utility.

       This script expects a SUSv2 compliant shell. Solaris systems should have the SUNWxcu4 package installed (when bogofilter is configured) so
       that /usr/xpg4/bin/sh can be used.

AUTHORS

       Matthias Andree

Bogofilter							    10/22/2012								 BF_TAR(1)
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