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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | AUTHOR | AVAILABILITY | SEE ALSO | COLOPHON |
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E2UNDO(8) System Manager's Manual E2UNDO(8)
e2undo - Replay an undo log for an ext2/ext3/ext4 filesystem
e2undo [ -f ] [ -h ] [ -n ] [ -o offset ] [ -v ] [ -z undo_file ]
undo_log device
e2undo will replay the undo log undo_log for an ext2/ext3/ext4
filesystem found on device. This can be used to undo a failed
operation by an e2fsprogs program.
-f Normally, e2undo will check the filesystem superblock to make
sure the undo log matches with the filesystem on the device.
If they do not match, e2undo will refuse to apply the undo log
as a safety mechanism. The -f option disables this safety
mechanism.
-h Display a usage message.
-n Dry-run; do not actually write blocks back to the filesystem.
-o offset
Specify the filesystem's offset (in bytes) from the beginning
of the device or file.
-v Report which block we're currently replaying.
-z undo_file
Before overwriting a file system block, write the old contents
of the block to an undo file. This undo file can be used with
e2undo(8) to restore the old contents of the file system
should something go wrong. If the empty string is passed as
the undo_file argument, the undo file will be written to a
file named e2undo-device.e2undo in the directory specified via
the E2FSPROGS_UNDO_DIR environment variable.
WARNING: The undo file cannot be used to recover from a power
or system crash.
e2undo was written by Aneesh Kumar K.V.
(aneesh.kumar@linux.vnet.ibm.com)
e2undo is part of the e2fsprogs package and is available from
http://e2fsprogs.sourceforge.net.
mke2fs(8), tune2fs(8)
This page is part of the e2fsprogs (utilities for ext2/3/4
filesystems) project. Information about the project can be found at
⟨http://e2fsprogs.sourceforge.net/⟩. It is not known how to report
bugs for this man page; if you know, please send a mail to
man-pages@man7.org. This page was obtained from the project's
upstream Git repository
⟨git://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git⟩ on 2018-02-02.
(At that time, the date of the most recent commit that was found in
the repository was 2018-01-03.) If you discover any rendering prob‐
lems in this HTML version of the page, or you believe there is a bet‐
ter or more up-to-date source for the page, or you have corrections
or improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to man-pages@man7.org
E2fsprogs version 1.43.8 January 2018 E2UNDO(8)
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