topic Re: restoring tar backup in Operating System - HP-UX

restoring tar backup

Sajith P V — Sun, 20 Jan 2008 12:02:39 GMT

Hi all,

I have a tar backup in tape. I want exclude some files and directories while restoring the tar backup. I cannot find a command for the same in the net. Expecting some gud solution from you people.

Sajith

Re: restoring tar backup

Hasan Atasoy — Sun, 20 Jan 2008 12:22:47 GMT

hi ;

assuming tar file is in the tape ( /dev/rmt/omn )

tar xvf /dev/rmt/0mn /path_of_the file

eg. you want to restore /tmp/myfile on the tape

then
tar xvf /dev/rmt/omn/ /tmp/myfile,

you can look at tape archive list by

tar tvf /dev/rmt/omn

Hasan

Re: restoring tar backup

Dennis Handly — Sun, 20 Jan 2008 13:12:47 GMT

There really isn't any good way to exclude things with tar(1). You can include complete directory trees and try to skip the ones you don't want.
You could also list all of the files you want to restore by using "tv" as Hasan mentioned.

You could also use pax(1) to read your tarfile. It has a -c option to exclude patterns.

Re: restoring tar backup

Steven Schweda — Sun, 20 Jan 2008 19:44:26 GMT

> I cannot find a command for the same in the
> net.

"man tar" would be my first resource.

> You could also use pax(1) [...]

Or GNU "tar":

[...]
--exclude=pattern
--exclude-from=file
[...]

http://www.gnu.org/software/tar/
http://www.gnu.org/software/tar/manual/

Re: restoring tar backup

Sajith P V — Mon, 21 Jan 2008 13:07:10 GMT

Can any one tell me the syntax of pax command to exclude the file while restoring?.....

Sajith

Re: restoring tar backup

Dennis Handly — Tue, 22 Jan 2008 01:30:42 GMT

Here is pax(1) for 11.31:
http://docs.hp.com/en/B2355-60130/pax.1.html

You need:
$ pax -r -f /dev/rmt/0mn -c pattern ...

You can leave out the "-r" (for read) to see if your exclude patterns are correct.

Re: restoring tar backup

john korterman — Tue, 22 Jan 2008 08:57:42 GMT

Hi Sajith,

you could perhaps use the -w option for tar, e.g.:
# tar -xvwf /dev/whatever/..

regards,
John K.

Re: restoring tar backup

Dennis Handly — Tue, 22 Jan 2008 10:58:36 GMT

>John: you could perhaps use the -w option for tar

That might work. But you may have to have a file with the appropriate number "y" and "n" to match which file is being restored. And would tar read from stdin?

Re: restoring tar backup

john korterman — Tue, 22 Jan 2008 12:28:14 GMT

Hi again,

the -w option on the command line causes tar to prompt the user for each file in the archive.
(although I would have expected an -i option for something like that)

regards,
John K.

Re: restoring tar backup

Sajith P V — Thu, 24 Jan 2008 10:14:10 GMT

hi,
my tar backup contains a lot of files and directories. I don't think it is possible to type n and y for these much files..

Sajith

Re: restoring tar backup

Steven Schweda — Thu, 24 Jan 2008 14:46:38 GMT

> [...] I don't think it is possible to type
> n and y for these much files..

Any problems with the "pax" or GNU "tar"
suggestions?