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

lsblk -u

Answer

fdisk -l

Answer

df -i

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

UUID=1234-ABCD /data ext4 defaults 0 2

Answer

/dev/sdb1 /data ext4 ro 0 2

Answer

UUID=1234-ABCD /data ext4 rw,noexec 0 2

Question 3

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

Accepted Answer

e2fsck -y /dev/sdb1

Answer

fsck -a /dev/sdb1

Answer

tune2fs -c /dev/sdb1

Answer

mkfs.ext4 -r /dev/sdb1

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

single

Answer

init=/bin/sh

Answer

systemd.unit=rescue.target

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 number of times the filesystem can be mounted

Answer

The priority of the mount operation

Answer

Whether the filesystem is automatically unmounted on shutdown

Question 6

Which command shows disk usage summary for each directory under /var, sorted by size?

Accepted Answer

du -sh /var/* | sort -h

Answer

df -h /var

Answer

ls -lS /var

Answer

stat /var/*

Question 7

What is the purpose of the 'noatime' mount option in /etc/fstab?

Accepted Answer

Prevents updating the access time on files when they are read

Answer

Disables write operations to the filesystem

Answer

Prevents the filesystem from being automounted

Answer

Disables creation timestamps on new files