>From the info tar command:
File: tar.info, Node: extracting files, Next: extract dir, Prev:
extracting archives, Up: extract
Extracting Specific Files
-------------------------
To extract specific archive members, give their exact member names as
arguments, as printed by `--list' (`-t'). If you had mistakenly deleted
one of the files you had placed in the archive `collection.tar' earlier
(say, `blues'), you can extract it from the archive without changing
the archive's structure. It will be identical to the original file
`blues' that you deleted.
First, make sure you are in the `practice' directory, and list the
files in the directory. Now, delete the file, `blues', and list the
files in the directory again.
You can now extract the member `blues' from the archive file
`collection.tar' like this:
$ tar --extract --file=collection.tar blues
If you list the files in the directory again, you will see that the file
`blues' has been restored, with its original permissions, creation
times, and owner. (These parameters will be identical to those which
the file had when you originally placed it in the archive; any changes
you may have made before deleting the file from the file system,
however, will _not_ have been made to the archive member.) The archive
file, `collection.tar', is the same as it was before you extracted
`blues'. You can confirm this by running `tar' with `--list' (`-t').
Remember that as with other operations, specifying the exact member
name is important. `tar --extract --file=bfiles.tar birds' will fail,
because there is no member named `birds'. To extract the member named
`./birds', you must specify `tar --extract --file=bfiles.tar ./birds'.
To find the exact member names of the members of an archive, use
`--list' (`-t') (*note list::).
You can extract a file to standard output by combining the above
options with the `--to-stdout' option (*note Writing to Standard
Output::).
If you give the `--verbose' (`-v') option, then `--extract'
(`--get', `-x') will print the names of the archive members as it
extracts them.
On Mon, 2002-11-04 at 23:34, Alan Dayley wrote:
> Before I wiped my partition and installed Red Hat Linux 8.0, I backed up
> my home directory to with tar. Now that I have things moving and am
> staying with 8.0, I want to restore some of the files from my backup.
>
> I was using GPG and had generated keys for myself. I don't know what
> file the keys and/or keyrings are in inside the tar backup. And, as an
> aside, I am not sure of the tar command syntax to extract specific files
> from the tar file. I don't want to just extract it all, only the files
> that I need. Any hints?
>
> Alan
>
>
>
>
>
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--
David IS Mandala
gpg fingerprint 8932 E7EF CCF5 1B8C 1B5C A92E C678 795E 45B2 D952
Phoenix, AZ (480) 460-7546 HP, (602) 321-8277 CP
http://www.them.com/~davidm/
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