Why SSH enables secure remote management in Linux CLI - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the command to start a secure SSH session to a remote server.

Linux CLI

ssh [1]@example.com

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

Auser

Bconnect

Clogin

Dremote

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'connect' or 'login' instead of the username causes errors.

The SSH command requires the username before the @ symbol to connect securely to the remote server.

2fill in blank

medium

Complete the SSH command to specify a custom port number 2222.

Linux CLI

ssh -p [1] [e-mail]

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

A80

B443

C2222

D22

Attempts:

3 left

💡 Hint

Common Mistakes

Using default port 22 when a custom port is required.

SSH uses port 22 by default, but specifying -p 2222 tells SSH to connect on port 2222 instead.

3fill in blank

hard

Fix the error in the SSH command to copy a file securely to a remote server.

Linux CLI

scp [1] -P 2222 file.txt [e-mail]:/home/user/

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

A-r

B-P

C-p

D-v

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase -p instead of uppercase -P for port specification.

To specify a port in scp, use uppercase -P. Lowercase -p preserves file attributes.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps usernames to their lowercase versions if the username starts with 'a'.

Linux CLI

{user: [1] for user in users if user.[2]('a')}

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

Auser.upper()

Buser.lower()

Cstartswith

Dendswith

Attempts:

3 left

💡 Hint

Common Mistakes

Using endswith instead of startswith.

Not normalizing case before checking.

The comprehension uses user.lower() to normalize case and user.startswith('a') to filter usernames starting with 'a'.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps filenames to their sizes if the size is greater than 1000 bytes.

Linux CLI

file_sizes = { [1]: [2] for [3] in files if files[[3]] > 1000 }

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

Afilename

Bfiles[filename]

Dsize

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names inconsistently.

Not accessing the size correctly.

The comprehension uses 'filename' as the key and 'files[filename]' as the value, iterating over 'filename' in files.