FREE Linux+ Filesystem and Storage Management Questions and Answers

Question 1

A system administrator needs to add a new disk, /dev/sdc, to an existing LVM volume group named 'vg_data' and then use all the new space to extend the logical volume '/dev/mapper/vg_data-lv_apps'.
Which of the following command sequences is the correct way to accomplish this?

Accepted Answer

pvcreate /dev/sdc && vgextend vg_data /dev/sdc && lvextend -l +100%FREE /dev/mapper/vg_data-lv_apps && resize2fs /dev/mapper/vg_data-lv_apps

Answer

vgextend vg_data /dev/sdc && pvcreate /dev/sdc && lvextend -r -l +100%FREE /dev/mapper/vg_data-lv_apps

Answer

mkfs.ext4 /dev/sdc && vgadd vg_data /dev/sdc && lvresize --extents +100%FREE /dev/mapper/vg_data-lv_apps

Answer

pvcreate /dev/sdc && vgadd vg_data /dev/sdc && lvextend -l +100%FREE /dev/mapper/vg_data-lv_apps

Question 2

A system administrator wants to ensure an XFS filesystem on the partition identified by UUID 'a1b2c3d4-e5f6-7890-1234-56789abcdef0' is automatically mounted to `/mnt/archive` at boot. Which of the following lines is correctly formatted for `/etc/fstab`?

Accepted Answer

UUID=a1b2c3d4-e5f6-7890-1234-56789abcdef0 /mnt/archive xfs defaults 0 0

Answer

mount /mnt/archive UUID=a1b2c3d4-e5f6-7890-1234-56789abcdef0 xfs defaults 0 0

Answer

/mnt/archive UUID=a1b2c3d4-e5f6-7890-1234-56789abcdef0 xfs auto 1 2

Answer

UUID=a1b2c3d4-e5f6-7890-1234-56789abcdef0 /mnt/archive xfs nofail

Question 3

A user reports the `/home` filesystem is nearly full. Which command would be most effective for a system administrator to identify the specific subdirectories within `/home/someuser` that are consuming the most disk space?

Accepted Answer

du -sh /home/someuser/* | sort -rh

Answer

find /home/someuser -type d -size +1G

Answer

df -h /home/someuser

Answer

ls -lR /home/someuser

Question 4

A Linux server has failed to boot, dropping to an emergency shell. The administrator determines the root filesystem on `/dev/sda2` has errors and needs to be repaired. The filesystem is currently unmounted. Which command should be used to automatically attempt to fix any detected errors non-interactively?

Accepted Answer

fsck -p /dev/sda2

Answer

e2fsck -f /dev/sda2

Answer

fsck -n /dev/sda2

Answer

mount -o remount,rw / && fsck /dev/sda2

Question 5

A system administrator has created a new partition, `/dev/sdb3`, to be used as additional swap space. What is the correct command to prepare this partition for use as swap before it can be enabled?

Accepted Answer

mkswap /dev/sdb3

Answer

swapon /dev/sdb3

Answer

mkfs.swap /dev/sdb3

Answer

format -t swap /dev/sdb3

Question 6

An administrator executes the command `mount -o remount,ro /data` on a filesystem that is currently mounted as read-write. What is the effect of this command?

Accepted Answer

The filesystem's mount options will be changed to read-only without unmounting it.

Answer

The command will fail because the filesystem is already mounted.

Answer

The filesystem will be unmounted and then immediately remounted as read-only.

Answer

The system will enter single-user mode to safely remount the filesystem.

A system administrator needs to add a new disk, /dev/sdc, to an existing LVM volume group named 'vg_data' and then use all the new space to extend the logical volume '/dev/mapper/vg_data-lv_apps'.Which of the following command sequences is the correct way to accomplish this?

A system administrator needs to add a new disk, /dev/sdc, to an existing LVM volume group named 'vg_data' and then use all the new space to extend the logical volume '/dev/mapper/vg_data-lv_apps'.
Which of the following command sequences is the correct way to accomplish this?