.\" -*- nroff -*-
.\" Copyright 2008 by Theodore Ts'o.  All Rights Reserved.
.\" This file may be copied under the terms of the GNU Public License.
.\"
.TH E2UNDO 8 "January 2017" "E2fsprogs version 1.43.4"
.SH NAME
e2undo \- Replay an undo log for an ext2/ext3/ext4 filesystem
.SH SYNOPSIS
.B e2undo
[
.B \-f
]
[
.B \-h
]
[
.B \-n
]
[
.B \-v
]
.I undo_log device
.SH DESCRIPTION
.B e2undo
will replay the undo log
.I undo_log
for an ext2/ext3/ext4 filesystem found on
.IR device .
This can be
used to undo a failed operation by an e2fsprogs program.
.SH OPTIONS
.TP
.B \-f
Normally,
.B e2undo
will check the filesystem superblock to make sure the undo log matches
with the filesystem on the device.  If they do not match,
.B e2undo
will refuse to apply the undo log as a safety mechanism.  The
.B \-f
option disables this safety mechanism.
.TP
.B \-h
Display a usage message.
.TP
.B \-n
Dry-run; do not actually write blocks back to the filesystem.
.TP
.BI \-o " offset"
Specify the filesystem's
.I offset
(in bytes) from the beginning of the device or file.
.TP
.B \-v
Report which block we're currently replaying.
.SH AUTHOR
.B e2undo
was written by Aneesh Kumar K.V. (aneesh.kumar@linux.vnet.ibm.com)
.SH AVAILABILITY
.B e2undo
is part of the e2fsprogs package and is available from
http://e2fsprogs.sourceforge.net.
.SH SEE ALSO
.BR mke2fs (8),
.BR tune2fs (8)