=== B1: dumpe2fs - block size, inode size, backup superblock ===
Block size:               1024
Blocks per group:         8192
Inode blocks per group:   512
Inode size:	          256
  Primary superblock at 1, Group descriptors at 2-2
  Backup superblock at 8193, Group descriptors at 8194-8194

=== B2: fls -r - cay thu muc + inode ===
d/d 11:	lost+found
d/d 12:	hoso
+ r/r 14:	ketoan.csv
r/r 13:	baocao.txt
V/V 4097:	$OrphanFiles

=== B3: icat doc noi dung theo inode ===
inode baocao.txt = 13
bao cao dieu tra - noi dung mat quy 3

=== B4: istat - 4 timestamp (co ca File Created cua ext4) ===
inode: 13
Allocated
Group: 0
Generation Id: 0
uid / gid: 0 / 0
mode: rrwxrwxrwx
Flags: Extents, 
size: 38
num of links: 1

Inode Times:
Accessed:	2026-10-18 17:36:28.000000000 (+07)
File Modified:	2026-10-18 17:36:28.000000000 (+07)
Inode Modified:	2026-10-18 17:36:28.000000000 (+07)
File Created:	2026-10-18 17:36:28.000000000 (+07)

Direct Blocks:
1173 

=== B5: xoa /baocao.txt roi kiem fls -r (dau *) va icat khoi phuc ===
MD5 goc: 96ca51f8d66ecc81df0f8e7ba497beb1
r/r * 13:	baocao.txt
icat inode 13 sau xoa: 96ca51f8d66ecc81df0f8e7ba497beb1  (md5 noi dung khoi phuc)
