TAR RESTORE ISSUE

[Omprakash_2]

Hi,

How can we restore a file from the tape, to different location.
For Eg:-
#tar -xvf /dev/rmt/0m /etc/hosts. While giving this command it will extract in the same location i.e, /etc/hosts (overwrite).

Note: I have already check by giving #tar -tvf -tvf /dev/rmt/0m.

I required this file to extract in different location. Can any one help me for this senario...

[Suraj K Sankari]

Hi,
Did you tried like this
go to a perticular directory suppose /tmp/dump

cd /tmp/dump
then give tar -xvf /dev/rmt/0mn .

Suraj

[Steven Schweda]

Step one would be to use a relative path
(like "etc/hosts") instead of an absolute
path (like "/etc/hosts") when creating the
archive.

If you're stuck with an archive which was
created with absolute paths, then you can
use "pax" or GNU "tar". A Forum search for
keywords like:
pax gnu tar absolute relative
should find several examples of each.


On a bad day, you could probably find a way
to use chroot, too, but that wouldn't be my
first choice.

[Omprakash_2]

Hi suraj,

I have tried by cd /tmp, but its extract only on the same location.

[Sherif A. Louis]

cd /tmp
tar xvf /dev/rmt/0m etc/hosts

use a RELATIVE path not an absolute

[Steven Schweda]

> I have tried by cd /tmp, but its extract
> only on the same location.

Not amazing, if you have an archive with
absolute paths.

> tar xvf /dev/rmt/0m etc/hosts
>
> use a RELATIVE path not an absolute

This might be useful advice when the archive
is being created, but did you actually try
that "tar" command, or are you only guessing
that it will do something useful?

For some potentially less useless advice:

http://www.gnu.org/software/tar/manual/html_node/transform.html#SEC108

[T G Manikandan]

YOu can use pax command for this like
if you want to restore into /opt

# cd /opt
# pax -r -s '|/etc/*||' -f /dev/rmt/0m

When you use gnu tar it strips of the leading slash so which always becomes relative on extraction.

[T G Manikandan]

to be specific

#pax -r -s '|/etc/hosts||' -f /dev/rmt/0m

[V. Nyga]

Hi,

you can also use 'backup and recovery' in 'sam'.
First backup in sam.
Then, with an interactive recovery you can choose a different path.

HTH
Volkmar

[Steven Schweda]

> When you use gnu tar it strips of[f] the
> leading slash so which always becomes
> relative on extraction.

It does? Can you demonstrate this?

[Steven Schweda]

> It does? Can you demonstrate this?

Ooh. You're right. More manual reading
required.

dy # gtar cfv test.tar /root/sp.c
gtar: Removing leading `/' from member names
/root/sp.c

dy # gtar tfv test.tar
-rw-r--r-- root/sys 103 2008-10-22 11:08 root/sp.c

There's an option, if you really want it done
the dangerous way:

dy # gtar --absolute-names -c -v -f test2.tar /root/sp.c
/root/sp.c

dy # gtar tfv test2.tar
gtar: Removing leading `/' from member names
-rw-r--r-- root/sys 103 2008-10-22 11:08 /root/sp.c

And yes, without "--absolute-names", it
_will_ strip the leading slash when it
extracts/restores the archive.

Around here:

dy # uname -a
HP-UX dy B.11.11 U 9000/785 2012616114 unlimited-user license

dy # gtar --version
tar (GNU tar) 1.18
[...]

Well, that was educational.