Skip to main content
Unix & Linux

Questions tagged [debugfs]

Ask Question

ext2/ext3/ext4 file system debugger

35 questions
Newest Active Bountied Unanswered
1 vote
1 answer
57 views

How to dump the lost+found content from an ext4 img file that cannot be mounted using debugfs in linux and keep the folder hierarchy? My ext4 disk was failing. I made a disk image. I tried e2fsck and ...
Estatistics's user avatar
  • 360
1 vote
0 answers
278 views

I am currently working on some PCI-e device stuff, that requires me to get the trace for DMA transactions on a specific (say GPU or NIC ) PCI card. After doing some research I found a useful post by ...
4spr1n's user avatar
  • 11
1 vote
1 answer
129 views

The mount point for debugfs is /sys/kernel/debug, and the mount point for sysfs is /sys/, why can these 2 mount points be overlapped without interference?
tristone's user avatar
  • 21
0 votes
1 answer
705 views

As far as I know, /sys/ is for sysfs, why debugfs is mounted under the /sys/ directory? Why not just mount it under /debug/ to make it clearer?
tristone's user avatar
  • 21
0 votes
1 answer
350 views

I'm playing with debugfs. I first created a file: debugfs -w /dev/vda1 > write /etc/hosts /a/b/c/d And the file system is broken: [root@linux2 /]# ls -l ls: cannot access /a/b/c/d: No such file or ...
daisy's user avatar
  • 55.9k
0 votes
1 answer
321 views

# debugfs -R 'stat <INODE>' /dev/sdaX or # debugfs -R 'stat FILENAME' /dev/sdaX> display file creation time etc. How to run this command if the DEVICE is a NAS mounted e.g. on /MOUNTPOINT/VOL-...
I'm not a bug -- I'm a feature's user avatar
  • 77
2 votes
0 answers
895 views

I wanted to have snapshots on my filesystem. Since the btrfs-convert tool is not available anymore, I was forced to convert my filesystem by copying it file-by-file on a new file-system. However, I ...
Camion's user avatar
  • 324
0 votes
0 answers
249 views

I made a copy of an ext4 volume with many errors and fscked it, before making an extensive comparison in order to make sure no data was lost in the process. since there were all kind of codings in the ...
Camion's user avatar
  • 324
3 votes
1 answer
3k views

$sudo blkid /dev/sda1: UUID="F959-61DE" TYPE="vfat" PARTUUID="950b18a0-1501-48b4-92ef-ba1dd15aaf21" /dev/sda2: UUID="6dfcfc23-b076-4eeb-8fba-a1261b4ea399" TYPE=&...
Milad Bazi Saz's user avatar
  • 48
1 vote
1 answer
1k views

I'm trying to read the contents of a file using the file's inode. This works fine: echo "First line" > data.txt sync sudo debugfs -R "cat <$(stat -c %i data.txt)>" /dev/...
Matthias Braun's user avatar
  • 8,829
0 votes
0 answers
348 views

I'm playing around with debugfs command: # debugfs -w /dev/sda1 -R "write /etc/passwd /test" debugfs 1.45.5 (07-Jan-2020) Allocated inode: 24 But /test is not created: # cat /test cat: /...
daisy's user avatar
  • 55.9k
0 votes
0 answers
3k views

I'm trying to trace some I/O on my Linux virtual machine. The capture gives me LBAs which I need to map to the file name. I'm trying to use debugfs for that. For example, I want to see what file LBA=...
Nikolai's user avatar
  • 196
1 vote
1 answer
984 views

I'm trying to create a file with the following specifications. The file "myfile" in a debugfs sub-directory is to be read only by any user, and when read, should return the current value of ...
thatbangaloreanguy's user avatar
  • 83
4 votes
3 answers
4k views

I wonder if there are ways to copy or restore crtime (creation time) for inodes/files/directories in Linux in 2020. I've accidentally deleted a folder while I still have a full disk backup, but ...
Artem S. Tashkinov's user avatar
  • 33k
1 vote
1 answer
336 views

I’m in a situation where I want to enlarge the default size of an ext4 filesystem used by the firmware. The problem is resize2fs is doing extra things like clearing some filesystems features and ...
user2284570's user avatar
  • 128

15 30 50 per page
1
2 3