RHCSA RHCSA Filesystem and Mount Configuration 5

Question 1

What is the correct way to persistently mount an ISO image file /images/rhel.iso at /mnt/iso using /etc/fstab?

Accepted Answer

/images/rhel.iso /mnt/iso iso9660 loop,ro 0 0

Answer

ISO images require the 'loop' mount option in fstab to attach them via the loop device, along with the iso9660 filesystem type.

Question 2

Which command shows the inode usage of filesystems, useful for diagnosing 'no space left' errors even when disk has free space?

Accepted Answer

df -i

Answer

df -i displays inode usage statistics; a filesystem can run out of inodes while still having free disk space.

Question 3

A user cannot write to /mnt/data even though they own the files. The mount shows 'ro'. How do you remount it read-write without unmounting?

Accepted Answer

mount -o remount,rw /mnt/data

Answer

mount -o remount,rw changes the mount options of an already-mounted filesystem without unmounting it.

Question 4

Which filesystem type is recommended for the /boot/efi partition on UEFI-based RHEL systems?

Accepted Answer

vfat

Answer

The EFI System Partition must be formatted as vfat (FAT32) because UEFI firmware can only read FAT filesystems.

Question 5

What command would you use to set the reserved block percentage to 1% on an ext4 filesystem at /dev/sdb1?

Accepted Answer

tune2fs -m 1 /dev/sdb1

Answer

tune2fs -m sets the percentage of reserved blocks for the superuser; reducing it from 5% to 1% reclaims space on large data disks.

RHCSA Exam Practice Test