e2undo - Replay an undo log for an ext2/ext3/ext4 file system
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
file system found on
device. This can be used to undo a failed
operation by an e2fsprogs program.
- -f
- Normally, e2undo will check the file system
superblock to make sure the undo log matches with the file system 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 file
system.
-
-o offset
- Specify the file system'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
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. (
[email protected])
e2undo is part of the e2fsprogs package and is available from
http://e2fsprogs.sourceforge.net.
mke2fs(8),
tune2fs(8)