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Full Discussion: Segmentation fault while trying to recover file with extundelete
Operating Systems Linux Fedora Segmentation fault while trying to recover file with extundelete Post 303022948 by milhan on Sunday 9th of September 2018 05:54:38 PM
Old 09-09-2018
Segmentation fault while trying to recover file with extundelete
hello,

I accidentally removed a directory with its contents with rm -r and I don't have a backup. I got to know about extundelete utility on linux and downloaded on my Linux Fedora 28 notebook PC. The file system is ext4. I log in to the system as single user mode and unmount the /home directory from the partition where the file was located; in this case it is /dev/mapper/fedora-home. After I unmounted /home I ran the fsck on the partition and it was successful, but when I try to recover the directory (or a single file) I get segmentation fault like this:
Code:
/ extundelete --restore-directory /home/milhan/Desktop/path/directory /dev/mapper/fedora-home
NOTICE: Extended attributes are not restored.
Loading filesystem metadata ... 3256 groups loaded.
Loading journal descriptors ... Segmentation fault (core dumped)

extundelete gave segmentation fault no matter what file I tried to recover, whether a directory or a single file, and I am certain I entered the file path correct. I did this right after the directory or file was removed. I unmounted the /home directory immediately thus avoiding any writes to the partition. Below is my filesystem:
Code:
~ df -h
Filesystem               Size  Used Avail Use% Mounted on
devtmpfs                 3.9G     0  3.9G   0% /dev
tmpfs                    3.9G   78M  3.8G   2% /dev/shm
tmpfs                    3.9G  1.5M  3.9G   1% /run
tmpfs                    3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/mapper/fedora-root   50G   12G   35G  26% /
tmpfs                    3.9G  256K  3.9G   1% /tmp
/dev/mapper/fedora-home  401G   57G  324G  15% /home
/dev/sda1                976M  191M  718M  22% /boot
tmpfs                    790M   24K  790M   1% /run/user/1000

Thank you.
 

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LEARN ABOUT DEBIAN

arbtt-recover

ARBTT-RECOVER(1)						Program references						  ARBTT-RECOVER(1)

NAME

       arbtt-recover - tries to recover a broken arbtt data log

SYNOPSIS

       arbtt-recover [OPTION...]

DESCRIPTION

       arbtt-recover tries to readsthe data samples recorded by arbtt-capture(1), skipping over possible broken entries. A fixed log file is
       written to <file>~/.arbtt/capture.log.recovered</file>. If the recovery was successful, you should stop arbtt-capture and move the file to
       <file>~/.arbtt/capture.log</file>.

       As a sid effect, arbtt-recover applies the log compression method implemented in version 0.4.5 to the samples created by an earlier
       version. If you have a large logfile written by older versions, running arbtt-recover is recommended.

OPTIONS

       -h, -?, --help
	   shows a short summary of the available options, and exists.

       -V, --version
	   shows the version number, and exists.

       -i, --infile
	   logfile to use instead of ~/.arbtt/capture.log

       -o, --outfile
	   where to save the recovered file, instead of ~/.arbtt/capture.log

FILES

       ~/.arbtt/capture.log
	   binary file, storing the arbtt data samples

       ~/.arbtt/capture.log.recovered
	   binary file, storing the fixed arbtt data samples

SEE ALSO

       See the arbtt manual for more information and the arbtt hackage page[1] for newer versions of arbtt.

AUTHORS

       Joachim Breitner <mail@joachim-breitner.de>
	   Main author of arbtt

       Sergey Astanin <s.astanin@gmail.com>
	   Contributor

       Martin Kiefel <mk@nopw.de>
	   Contributor

       Muharem Hrnjadovic <muharem@linux.com>
	   Contributor

NOTES

	1. arbtt hackage page
	   http://www.hackage.org/package/arbtt

arbtt manual							    04/07/2012							  ARBTT-RECOVER(1)
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