-?????????? ? ? ? ? ? shadowIf you see this you are probably in big trouble, it could be a physical error or if it's a VM image that it is corrupted due to a physical error on the underlying disk/array/NAS or it could also be that somehow the image was accessed and mounted more than once concurrently. This is almost always impossible to fix but you can always try to fsck anyway!
----------. 1 root root 748 Jul 10 04:35 shadow-
cat: shadow: Input/output error
fsck 1.45.6 (20-Mar-2020)
e2fsck 1.45.6 (20-Mar-2020)
/dev/mapper/loop5p1 contains a file system with errors, check forced.
Pass 1: Checking inodes, blocks, and sizes
Deleted inode 11383 has zero dtime. Fix
Deleted inode 11387 has zero dtime. Fix
Deleted inode 11388 has zero dtime. Fix
Pass 2: Checking directory structure
Entry 'shadow' in /etc (13) has deleted/unused inode 11390. Clear
Entry 'shadow-202007141594765348' in /etc (13) has deleted/unused inode 11386. Clear
Entry 'shadow-202007141594770924' in /etc (13) has deleted/unused inode 11386. Clear
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Inode 11328 ref count is 1, should be 3. Fix
Pass 5: Checking group summary information
Block bitmap differences: -(45056--47103) -(68608--70172) -(71680--73727) -(77824--77828) -(83968--84460)
Free blocks count wrong for group #1 (10183, counted=12231).
Free blocks count wrong for group #2 (11477, counted=15588).
Free blocks count wrong (675912, counted=682073).
Inode bitmap differences: -11340 -11383 -(11387--11388)
Free inodes count wrong for group #1 (4671, counted=4675).
Free inodes count wrong (242659, counted=242665).
/dev/mapper/loop5p1: ***** FILE SYSTEM WAS MODIFIED *****
/dev/mapper/loop5p1: 39015/281680 files (0.2% non-contiguous), 442791/1124864 blocks
permissions, jul, input, output, vm, corrupted, underlying, disk, array, nas, accessed, mounted, concurrently, fsck, dev, mapper, mar, contains, errors, inodes, sizes, deleted, inode, dtime, directory, entry, etc, unused, connectivity, reference, ref, summary, bitmap, differences, counted, modified, contiguous,