mount and umount in Linux CLI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to mount the device /dev/sdb1 to /mnt/usb.

Linux CLI

sudo [1] /dev/sdb1 /mnt/usb

Drag options to blanks, or click blank then click option'

Amount

Bumount

Cls

Dcd

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'umount' instead of 'mount' will try to detach the device.

Using 'ls' or 'cd' does not mount devices.

The 'mount' command is used to attach the device to the directory.

2fill in blank

medium

Complete the code to unmount the device mounted at /mnt/usb.

Linux CLI

sudo [1] /mnt/usb

Drag options to blanks, or click blank then click option'

Amount

Bls

Ccd

Dumount

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'mount' instead of 'umount' will try to attach the device again.

Using 'ls' or 'cd' does not unmount devices.

The 'umount' command detaches the device from the directory.

3fill in blank

hard

Fix the error in the command to mount /dev/sdc1 to /media/usb.

Linux CLI

sudo mount [1] /media/usb

Drag options to blanks, or click blank then click option'

A/media

B/dev/sdc1

C/media/usb

D/dev/sdc

Attempts:

3 left

💡 Hint

Common Mistakes

Using '/dev/sdc' mounts the whole disk, which may cause errors.

Using the mount point as device causes failure.

The device must be the full partition name '/dev/sdc1' to mount correctly.

4fill in blank

hard

Fill both blanks to mount the device /dev/sdd1 with read-only option to /mnt/backup.

Linux CLI

sudo mount -o [1] [2] /mnt/backup

Drag options to blanks, or click blank then click option'

Aro

Brw

C/dev/sdd1

D/mnt/backup

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'rw' mounts read-write, not read-only.

Swapping device and mount point causes errors.

The 'ro' option mounts the device read-only, and the device path is '/dev/sdd1'.

5fill in blank

hard

Fill all three blanks to unmount the device mounted at /media/usb and verify with a command.

Linux CLI

sudo [1] /media/usb && [2] && [3] /media/usb

Drag options to blanks, or click blank then click option'

Aumount

Bls

Cmount

Dcd

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'mount' instead of 'umount' to detach device.

Using 'cd' instead of 'ls' to check directory.

First unmount with 'umount', then check mounts with 'mount', and list directory with 'ls'.

Practice

1. What does the mount command do in Linux?

easy

A. It formats a storage device for use.

B. It connects a device or filesystem to a directory so you can access its files.

C. It disconnects a device from the system safely.

D. It lists all files in a directory.

Solution

1. Step 1: Understand the purpose of mount

   The mount command attaches a device or filesystem to a directory, making its files accessible.

2. Step 2: Differentiate from umount and other commands

   Umount disconnects devices, formatting prepares devices, and listing files is done by ls, not mount.

3. Final Answer:

   It connects a device or filesystem to a directory so you can access its files. -> Option B

4. Quick Check:

   Mount = Connect device to directory [OK]

Hint: Mount = connect device to folder, umount = disconnect [OK]

Common Mistakes:

• Confusing mount with umount
• Thinking mount formats devices
• Assuming mount lists files

2. Which of the following is the correct syntax to mount a device /dev/sdb1 to directory /mnt/usb?

easy

A. mount -u /dev/sdb1 /mnt/usb

B. mount /mnt/usb /dev/sdb1

C. umount /dev/sdb1 /mnt/usb

D. mount /dev/sdb1 /mnt/usb

Solution

1. Step 1: Recall mount command syntax

   The correct syntax is mount [device] [mount_point], so device first, then directory.

2. Step 2: Check options for correctness

   mount /dev/sdb1 /mnt/usb matches the syntax: mount /dev/sdb1 /mnt/usb. Others reverse order or use wrong command.

3. Final Answer:

   mount /dev/sdb1 /mnt/usb -> Option D

4. Quick Check:

   mount device directory = correct syntax [OK]

Hint: Device first, then directory in mount command [OK]

Common Mistakes:

• Swapping device and directory order
• Using umount instead of mount
• Adding wrong options like -u

3. What will be the output of the command sequence below if /dev/sdb1 is already mounted on /mnt/usb?

mount /dev/sdb1 /mnt/usb
mount | grep /mnt/usb

medium

A. /dev/sdb1 on /mnt/usb type ext4 (rw,relatime)

B. mount: /mnt/usb is busy

C. mount: /dev/sdb1 is already mounted

D. No output

Solution

1. Step 1: Understand mounting an already mounted device

   Running mount on an already mounted device usually remounts or shows no error, depending on system, but the second command lists mounts.

2. Step 2: Analyze the grep output

   The command mount | grep /mnt/usb shows the current mount info for that directory, typically like /dev/sdb1 on /mnt/usb type ext4 (rw,relatime).

3. Final Answer:

   /dev/sdb1 on /mnt/usb type ext4 (rw,relatime) -> Option A

4. Quick Check:

   mount | grep shows mount info [OK]

Hint: mount | grep shows current mounts [OK]

Common Mistakes:

• Expecting error when mounting already mounted device
• Confusing mount error messages
• Ignoring output of grep command

4. You try to unmount a device with umount /mnt/usb but get the error: umount: /mnt/usb: target is busy. What is the best way to fix this?

medium

A. Close any open files or terminals using /mnt/usb, then try umount again.

B. Force unmount with umount -f /mnt/usb immediately.

C. Reboot the system to clear the busy state.

D. Delete the /mnt/usb directory and try umount again.

Solution

1. Step 1: Understand 'target is busy' error

   This error means some process is using files or directories inside /mnt/usb, blocking unmount.

2. Step 2: Proper fix is to close those processes

   Close open files, terminals, or programs accessing /mnt/usb, then run umount again safely.

3. Final Answer:

   Close any open files or terminals using /mnt/usb, then try umount again. -> Option A

4. Quick Check:

   Busy means in-use; close files before umount [OK]

Hint: Close files using mount point before umount [OK]

Common Mistakes:

• Forcing unmount without checking usage
• Deleting mount directory instead of unmounting
• Rebooting unnecessarily

5. You want to write a script that mounts a USB device /dev/sdb1 to /mnt/usb, copies a file data.txt to it, then safely unmounts it. Which sequence of commands is correct?

hard

A. umount /mnt/usb && mount /dev/sdb1 /mnt/usb && cp data.txt /mnt/usb/

B. cp data.txt /mnt/usb/ && mount /dev/sdb1 /mnt/usb && umount /mnt/usb

C. mount /dev/sdb1 /mnt/usb && cp data.txt /mnt/usb/ && umount /mnt/usb

D. mount /mnt/usb /dev/sdb1 && cp data.txt /mnt/usb/ && umount /mnt/usb

Solution

1. Step 1: Mount device before copying files

   You must mount the device first to access its filesystem, so mount command comes first.

2. Step 2: Copy file then unmount safely

   After copying, unmount to safely disconnect device. The sequence is mount, copy, then umount.

3. Final Answer:

   mount /dev/sdb1 /mnt/usb && cp data.txt /mnt/usb/ && umount /mnt/usb -> Option C

4. Quick Check:

   Mount -> copy -> umount sequence [OK]

Hint: Mount first, copy files, then unmount [OK]

Common Mistakes:

• Copying files before mounting
• Unmounting before copying
• Swapping device and directory in mount