104.2 Maintain Integrity of Filesystems

Question 1

Filesystem Integrity

responsible for estimating disk space usage on files and or directories

Answer 1

du

Question 2

Filesystem Integrity: du

write counts for all files and not just directories

Answer 2

du -a

du –all

Question 3

Filesystem Integrity: du

produce a grand total

Answer 3

du -c

du –total

Question 4

Filesystem Integrity: du

print sizes in readable format (K/M/G/TB)

Answer 4

du -h

du –human-readable

Question 5

Filesystem Integrity: du

display only a summary for any argument

Answer 5

du -s

du –summarize

Question 6

Filesystem Integrity: du

can be used with file

Answer 6

globbing

Question 7

Filesystem Integrity

reports on a file system disk space usage

Answer 7

df

Question 8

Filesystem Integrity: df

include all filesystems including dummy filesystems

Answer 8

df -a

df –all

Question 9

Filesystem Integrity: df

show stats for a file instead of mount

Answer 9

df –direct

Question 10

Filesystem Integrity: df

print a grand total

Answer 10

df –total

Question 11

Filesystem Integrity: df

print sizes for in readable format (K/M/G/TB)

Answer 11

df -h

df –human-readable

Question 12

Filesystem Integrity: df

include only local file systems

Answer 12

df -l

df –local

Question 13

Filesystem Integrity: df

limit listing to the indicated type

Answer 13

df -t

df –type

Question 14

Filesystem Integrity

filesystem debugger can show a vast amount of info about indicated partition

Answer 14

debugfs

Question 15

Filesystem Integrity: debugfs

will show a lot of info about any selected file or folder on the indicated drive

Answer 15

degubfs /dev/sdb1

Question 16

Filesystem Integrity: debugfs - interactive

show available commands

Answer 16

?

Question 17

Filesystem Integrity: debugfs - interactive

change the indicated path and must exist on disk debugfs is running on

Answer 17

cd [path]

Question 18

Filesystem Integrity: debugfs - interactive

display filesystem features

Answer 18

features

Question 19

Filesystem Integrity: debugfs - interactive

display journal contents if available

Answer 19

logdump

Question 20

Filesystem Integrity: debugfs - interactive

shows contents of current directory

Answer 20

ls

Question 21

Filesystem Integrity: debugfs - interactive

shows working directory

Answer 21

pwd

Question 22

Filesystem Integrity: debugfs - interactive

open a filesystem for debugging

Answer 22

open

Question 23

Filesystem Integrity: debugfs - interactive

show stats for filesystem

Answer 23

stats

Question 24

Filesystem Integrity: debugfs - interactive

undeletes a file (NOTE: MUST be used immediately after deleting a file before
all changes are synced to disk - often fails to find the deleted file on modern distributions as
‘sync’ is the default filesystem disk setting)

Answer 24

undelete

Question 25

Filesystem Integrity: debugfs - interactive quit

Answer 25

exit

Question 26

Filesystem Check

Answer 26

fsck

Question 27

Filesystem Check checks ext filesystems type

Answer 27

e2fsck

Question 28

Filesystem Check check ReiserFS filesystem type

Answer 28

reiserfsck

Question 29

Filesystem Check check DOS filesystem types - VFAT

Answer 29

dosfsck

Question 30

Filesystem Check check filesystems automatically on boot (those with a '1' in the sixth column in the file), when a filesystem is marked 'unclean' (crashed, corrupt, not cleanly unmounted, etc), a deeper scan will be performed

Answer 30

uses /etc/fstab

Question 31

Filesystem Check if filesystem cannot be fixed automatically on boot

Answer 31

CTRL-D to continue or provide root password to perform a deeper scan

Question 32

Filesystem Check - fsck will iterate through the /etc/fstab file and check all filetystms

Answer 32

fsck -A

Question 33

Filesystem Check - fsck display has/mark progress bar

Answer 33

fsck -C

Question 34

Filesystem Check - fsck dry run makes no changes but displays what would have been done

Answer 34

fsck -N

Question 35

Filesystem Check - fsck verbose output (prolific and may scroll quickly by)

Answer 35

fsck -V

Question 36

Filesystem Check - fsck just do it does not prompt for confirmation or any other feedback and runs the checks and repair non-interactively

Answer 36

fsck -a

Question 37

Filesystem Check - fsck force a check even if filesystem reports clean

Answer 37

fsck -f

Question 38

Filesystem Check - fsck check inodes, blocks, sizes

Answer 38

fsck step 1

Question 39

Filesystem Check - fsck check directory structure

Answer 39

fsck step 2

Question 40

Filesystem Check - fsck check directory connectivity

Answer 40

fsck step 3

Question 41

Filesystem Check - fsck check file/directory reference counts

Answer 41

fsck step 4

Question 42

Filesystem Check - fsck check group summary info

Answer 42

fsck step 5

Question 43

Filesystem Check - fsck only run fsck on unmounted filesystems or the action performed may cause

Answer 43

instability or corruption

Question 44

Filesystem Check used to set filesystem parameters after creation

Answer 44

tune2fs

Question 45

Filesystem Check - tune2fs set max number of times a filesystem can be mounted for an fsck to happen automatically

Answer 45

tune2fs -c [#]

Question 46

Filesystem Check - tune2fs modifies the behavior of the filesystem with the indicated option (continue, remount-ro, panic)

Answer 46

tune2fs -e [option]

Question 47

Filesystem Check - tune2fs add indicated group as potential users of the reserved space on a filesystem - usually reserved for root

Answer 47

tune2fs -g [groupname]

Question 48

Filesystem Check: xfsprogs tools and utilities for the XFS filesystem

Answer 48

xfsprogs

Question 49

Filesystem Check: xfsprogs XFS filesystem equivalent to fsck for checking file systems

Answer 49

xfs_check

Question 50

Filesystem Check: xfsprogs XFS filesystem equivalent to fsck for repairing filesystem

Answer 50

xfs_repair

Question 51

Filesystem Check: xfsprogs creates debugging info that can be used by a third party to aid in recovery of an XFS filesystem when repair has failed

Answer 51

xfs_metadump

Question 52

Filesystem Check: xfsprogs used to grow an XFS filesystem - it can never shrink

Answer 52

xfs_growfs