RHCSA RHCSA Filesystem and Mount Configuration 2

Question 1

Which command displays the UUID of all block devices on a RHEL system?

Accepted Answer

blkid

Answer

blkid queries and displays block device attributes including UUID, filesystem type, and label.

Question 2

What entry in /etc/fstab would mount a filesystem with UUID 1234-ABCD at /data with read-only access?

Accepted Answer

UUID=1234-ABCD /data ext4 ro 0 2

Answer

The fstab entry uses UUID=<value> as the device field, followed by mountpoint, filesystem type, and options including 'ro' for read-only.

Question 3

Which command checks and repairs an ext4 filesystem on /dev/sdb1 without interactive prompts?

Accepted Answer

e2fsck -y /dev/sdb1

Answer

e2fsck -y automatically answers 'yes' to all repair questions, enabling non-interactive filesystem repair.

Question 4

A system fails to boot because of an incorrect /etc/fstab entry. Which kernel parameter allows you to boot into a rescue shell to fix it?

Accepted Answer

rd.break

Answer

rd.break interrupts the boot process before the root filesystem is mounted, providing a rescue shell to fix fstab issues.

Question 5

What does the last field (pass) in an /etc/fstab entry control?

Accepted Answer

The order in which fsck checks filesystems at boot

Answer

The pass field controls the order in which fsck checks filesystems at boot; 0 means skip, 1 is for root, 2 for others.

RHCSA Exam Practice Test