debugfs create special files mke2fs -Fq -b 1024 test.img 512 Exit status is 0 debugfs -R ''stat foo'' -w test.img Inode: 12 Type: symlink Mode: 0777 Flags: 0x0 Generation: 0 Version: 0x00000000 User: 0 Group: 0 Size: 3 File ACL: 0 Links: 1 Blockcount: 0 Fragment: Address: 0 Number: 0 Size: 0 ctime: 0x50f560e0 -- Tue Jan 15 14:00:00 2013 atime: 0x50f560e0 -- Tue Jan 15 14:00:00 2013 mtime: 0x50f560e0 -- Tue Jan 15 14:00:00 2013 Fast link dest: "bar" Exit status is 0 debugfs -R ''stat foo2'' -w test.img Inode: 13 Type: symlink Mode: 0777 Flags: 0x0 Generation: 0 Version: 0x00000000 User: 0 Group: 0 Size: 80 File ACL: 0 Links: 1 Blockcount: 2 Fragment: Address: 0 Number: 0 Size: 0 ctime: 0x50f560e0 -- Tue Jan 15 14:00:00 2013 atime: 0x50f560e0 -- Tue Jan 15 14:00:00 2013 mtime: 0x50f560e0 -- Tue Jan 15 14:00:00 2013 BLOCKS: (0):28 TOTAL: 1 Exit status is 0 debugfs -R ''block_dump 28'' -w test.img 0000 3132 3334 3536 3738 3930 3132 3334 3536 1234567890123456 0020 3738 3930 3132 3334 3536 3738 3930 3132 7890123456789012 0040 3334 3536 3738 3930 3132 3334 3536 3738 3456789012345678 0060 3930 3132 3334 3536 3738 3930 3132 3334 9012345678901234 0100 3536 3738 3930 3132 3334 3536 3738 3930 5678901234567890 0120 0000 0000 0000 0000 0000 0000 0000 0000 ................ * Exit status is 0 debugfs -R ''stat pipe'' -w test.img Inode: 14 Type: FIFO Mode: 0000 Flags: 0x0 Generation: 0 Version: 0x00000000 User: 0 Group: 0 Size: 0 File ACL: 0 Links: 1 Blockcount: 0 Fragment: Address: 0 Number: 0 Size: 0 ctime: 0x50f560e0 -- Tue Jan 15 14:00:00 2013 atime: 0x50f560e0 -- Tue Jan 15 14:00:00 2013 mtime: 0x50f560e0 -- Tue Jan 15 14:00:00 2013 BLOCKS: Exit status is 0 debugfs -R ''stat sda'' -w test.img Inode: 15 Type: block special Mode: 0000 Flags: 0x0 Generation: 0 Version: 0x00000000 User: 0 Group: 0 Size: 0 File ACL: 0 Links: 1 Blockcount: 0 Fragment: Address: 0 Number: 0 Size: 0 ctime: 0x50f560e0 -- Tue Jan 15 14:00:00 2013 atime: 0x50f560e0 -- Tue Jan 15 14:00:00 2013 mtime: 0x50f560e0 -- Tue Jan 15 14:00:00 2013 Device major/minor number: 08:00 (hex 08:00) Exit status is 0 debugfs -R ''stat null'' -w test.img Inode: 16 Type: character special Mode: 0000 Flags: 0x0 Generation: 0 Version: 0x00000000 User: 0 Group: 0 Size: 0 File ACL: 0 Links: 1 Blockcount: 0 Fragment: Address: 0 Number: 0 Size: 0 ctime: 0x50f560e0 -- Tue Jan 15 14:00:00 2013 atime: 0x50f560e0 -- Tue Jan 15 14:00:00 2013 mtime: 0x50f560e0 -- Tue Jan 15 14:00:00 2013 Device major/minor number: 01:03 (hex 01:03) Exit status is 0 e2fsck -yf -N test_filesys Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Pass 5: Checking group summary information test_filesys: 16/64 files (0.0% non-contiguous), 29/512 blocks Exit status is 0