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By: keithmarshall
Huh? tar doesn't compress files; it compounds them into an archive. Yes, it
supports on-the-fly compression of that archive, but it relies on other tools,
(separate programs), to do the job. OTOH, in the case of bsdtar, AKAIK, the
compression filters are built in, using functions from libarchive.
Notwithstanding that bsdtar may be a better choice, the OP's command line syntax
is wrong for either -- the mandatory archive name argument, (promised by the
'f' option), has been omitted! It should be:
> c:\gnuwin32\tar -czvf archive-name.tar.gz subdir-or-list-of-files ...
or:
> c:\gnuwin32\bsdtar -czvf archive-name.tar.gz subdir-or-list-of-files ...
The .tar.gz extension isn't mandatory, but is recommended for gzipped archives,
(the 'z' option); use .tar.bz2 for bzipped archives, ('j' option), .tar.lzma
for lzma or .tar.xz for xz compressed archives, (don't know if GnuWin32 supports
those yet).
Also note some gotchas:
1) Never specify absolute path names, in subdir-or-list-of-files ...
2) If you want to back up all files in a directory, (as the OP's *.* indicates),
prefer to run tar in the parent directory, and specify the name of the subdir
to back up.
3) tar, (and bsdtar), will recurse into any subdirectories which match a
wildcard
spec in the files list.
4) Never specify the archive-name to reside in the same directory as files
specified
by wildcard, or in any subdirectory which may be recursed.
5) If backing up everything from the root of a drive, be sure to place the
archive
on a different drive, (and be sure that it has sufficient free space).
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