strip docs under GFDL which are not DFSG-compliant

[tar] / doc / tar-snapshot-edit.texi

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-@c This is part of the paxutils manual.
-@c Copyright (C) 2007 Free Software Foundation, Inc.
-@c This file is distributed under GFDL 1.1 or any later version
-@c published by the Free Software Foundation.
-
-@cindex Device numbers, changing
-@cindex snapshot files, editing
-@cindex snapshot files, fixing device numbers
-  Sometimes device numbers can change after upgrading your kernel
-version or recofiguring the harvare.  Reportedly this is the case with 
-some newer @i{Linux} kernels, when using @acronym{LVM}.  In majority of
-cases this change is unnoticed by the users.  However, it influences
-@command{tar} incremental backups: the device number is stored in tar
-snapshot files (@pxref{Snapshot Files}) and is used to determine whether
-the file has changed since the last backup.  If the device numbers
-change for some reason, the next backup you run will be a full backup.
-
-@pindex tar-snapshot-edit
-  To minimize the impact in these cases, GNU @command{tar} comes with
-the @command{tar-snapshot-edit} utility for inspecting and updating
-device numbers in snapshot files.  The utility, written by
-Dustin J.@: Mitchell, is available from
-@uref{http://www.gnu.org/@/software/@/tar/@/utils/@/tar-snapshot-edit.html,
-@GNUTAR{} home page}. 
-
-  To obtain the device numbers used in the snapshot file, run 
-
-@smallexample
-$ @kbd{tar-snapshot-edit @var{snapfile}}
-@end smallexample
-
-@noindent
-where @var{snapfile} is the name of the snapshot file (you can supply as many
-files as you wish in a single command line ).
-
-To update all occurrences of the given device number in the file, use
-@option{-r} option.  It takes a single argument of the form
-@samp{@var{olddev}-@var{newdev}},  where @var{olddev} is the device number
-used in the snapshot file, and @var{newdev} is the corresponding new device
-number.  Both numbers may be specified in hex (e.g., @samp{0xfe01}),
-decimal (e.g., @samp{65025}), or as a major:minor number pair (e.g.,
-@samp{254:1}).  To change several device numbers at once, specify them
-in a single comma-separated list, as in
-@option{-r 0x3060-0x4500,0x307-0x4600}.
-
-Before updating the snapshot file, it is a good idea to create a backup
-copy of it.  This is accomplished by @samp{-b} option.  The name of the
-backup file is obtained by appending @samp{~} to the original file name.
-
-An example session:
-@smallexample
-$ @kbd{tar-snapshot-edit /var/backup/snap.a}
-file version 2
-/tmp/snap: Device 0x0306 occurs 634 times.
-$ @kbd{tar-snapshot-edit -b -r 0x0306-0x4500 /var/backup/snap.a}
-file version 2
-@end smallexample
-