Labsim Section 7.4

Question 1

df

Answer 1

Display the free space in the partition holding the specified directory. If directory is given, the space available on all currently mounted file systems is shown. Disk space is shown in 1K blocks by default.

Question 2

du

Answer 2

Display files and file sizes in and below a specified directory.

Question 3

lsof

Answer 3

Display open files in the file system.

Question 4

fuser

Answer 4

Check and optionally repair one or more Linux file systems.

Question 5

e2fsck

Answer 5

Check and optionally repair a second extended file system (ext2) or ext2 files systems containing a journal (ext3).

Question 6

debugfs

Answer 6

Debug the file system. The command examines and changes the state of an ext2, ext3, or ext4 file system. It allows administrators to unlink directories, change inode blocks find all inodes that point to a block, and several other similar functions

Question 7

dumpe2fs

Answer 7

Print super block and block information for an ext2, ext3, or ext4 file system. This includes information for each sector on the partition about sector type, block ranges, inode information, free blocks, and similar information.

Question 8

tune2fs

Answer 8

Adjust tunable file system parameters on ext2, ext3, and ext4 file systems. Some of the adjustable parameters include volume label, reserved blocks, inode sizes, and journaling. Tune2fs can also implement access control lists for individual users.

Question 9

xfs_info

Answer 9

Display the XFS file system parameters, such as the block size and inode data structures. This is the same functionality as the xfs_growfs -n command.

Question 10

xfs_metadump

Answer 10

Copy (dump) the metadata from an XFS file system to a file. It does not alter the file system. By default, the file names and extended attribute names are obfuscated before they are dumped.

Question 11

Print blocks that are bad in the file system?

Answer 11

dumpe2fs -b

Question 12

Display XFS system file parameters.

Answer 12

xfs_info; xfs_growfs -n

Question 13

What option for debugfs should you use to examine the filesystem?

Answer 13

debugfs -c

Question 14

How do you determine if any of the files in /bin are corrupt?

Answer 14

Use an integrity checking program to check the files in /bin.

Question 15

Which e2fsck option will repair damage to the filesystem without any interaction from the user?

Answer 15

e2fsck -p

Question 16

Which command will display all the available disk space on all partitions?

Answer 16

df; df -h

Question 17

Which commands do you use to copy all the files from the drive /deb/sdb1, which has an XFS file system, to the /reviewxfs file?

Answer 17

xfs_metadump -o /dev/sdb1 /reviewxfs

Question 18

Which command will show you the amount of free space in the /sales directory?

Answer 18

df /sales

Question 19

What command and option should you use to convert the filesystem of /dev/sdb3 from ext2 to ext3 without affecting the data on the drive?

Answer 19

tune2fs -j /dev/sdb3

Question 20

How do you check the filesystem on sda2 and fix the errors for a user who has complained of filesystem errors reported during booting?

Answer 20

Change to single user mode and run fsck /dev/sda2

Question 21

What is the effect of tune2fs -j /dev/sdb1 command?

Answer 21

Converts the /dev/sdb1 device to ext3

Question 22

Which command allows you to use an alternative superblock when the primary superblock has been corrupted?

Answer 22

e2fsck -b 16385 /dev/sda1