[ale] Making a backup with tar

[Stephan Uphoff]

On Wed, 2005-01-19 at 14:21, Christopher Fowler wrote:
> I tried the -l option and it seemed that tar did not understand that
> /sys was a different filesystem. I saw it walking that directory trying
> to add those files.  /sys is sysfs.

Works on my laptop.

sunburn:/# tar clvf /dev/null ./
./sys/
tar: ./sys/: file is on a different filesystem; not dumped


sunburn:/# stat /
  File: `/'
  Size: 4096            Blocks: 8          IO Block: 4096   directory
Device: 302h/770d       Inode: 2           Links: 21
Access: (0755/drwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2004-05-05 07:35:04.000000000 -0400
Modify: 2004-05-13 11:51:46.000000000 -0400
Change: 2004-05-13 11:51:46.000000000 -0400

sunburn:/# stat /sys/
  File: `/sys/'
  Size: 0               Blocks: 0          IO Block: 4096   directory
Device: 0h/0d   Inode: 1           Links: 8
Access: (0755/drwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2005-01-19 14:26:21.000000000 -0500
Modify: 2005-01-11 12:32:29.000000000 -0500
Change: 2005-01-11 12:32:29.000000000 -0500

sunburn:/# uname -a
Linux sunburn 2.6.5 #1 Mon May 3 17:45:45 EDT 2004 i686 GNU/Linux

sunburn:/# tar --version
tar (GNU tar) 1.13.93
Copyright (C) 2003 Free Software Foundation, Inc.
This program comes with NO WARRANTY, to the extent permitted by law.
You may redistribute it under the terms of the GNU General Public
License;
see the file named COPYING for details.
Written by John Gilmore and Jay Fenlason.

> 
> On Wed, 2005-01-19 at 13:56, Stephan Uphoff wrote:
> > --preserve on extraction always worked for me.
> > 
> > I recommend creating a backup file per file system with -l or
> > --one-file-system using a relative path.
> > 
> > 	(cd /  ; tar cjvlf tarfile1.bz2 ./)
> > 	(cd /usr ; tar cjvlf tarfile2.bz2 ./)
> > 
> > makes it easier to install from bare metal.
> > 
> > 
> > On Wed, 2005-01-19 at 12:46, Christopher Fowler wrote:
> > > I'm trying to create a file system backup using 'tar -cjpsvf
> > > /bu/full.tar.bz2 /bin /boot /opt /home ...'.  When I extract the files
> > > they are all owned by root.  Should I use the '--same-owner' option on
> > > extraction?
> > > 
> > > Chris
> > > 
> > > 
> > > _______________________________________________
> > > Ale mailing list
> > > Ale at ale.org
> > > http://www.ale.org/mailman/listinfo/ale
> > > 
> > > 
> 
> 
>