SCP for file transfer in Linux CLI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to copy a file named document.txt from your local machine to a remote server.

Linux CLI

scp document.txt [1]:/home/user/

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

Auser@remote-server:/home/user

Bremote-server

C/home/user

Duser@remote-server

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to include the username before the @ symbol.

Using only the server name without the username.

Including the full path after the colon when it's already specified in the command.

You need to specify the remote user and server in the format user@remote-server to copy the file to the remote machine.

2fill in blank

medium

Complete the code to copy a directory named project recursively from your local machine to the remote server.

Linux CLI

scp -[1] project user@remote-server:/home/user/

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

Ad

Br

Cp

DR

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase -R which is not valid for scp.

Using -p which preserves file attributes but does not copy directories.

Omitting the recursive option when copying directories.

The -r option tells scp to copy directories recursively.

3fill in blank

hard

Fix the error in the command to copy file.txt from the remote server to your local machine.

Linux CLI

scp user@remote-server[1]file.txt /home/localuser/

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

A:

B/

C@

D~

Attempts:

3 left

💡 Hint

Common Mistakes

Using a slash instead of a colon after the server name.

Omitting the colon entirely.

Using the tilde or at symbol incorrectly.

You must use a colon : after the remote server to specify the remote file path.

4fill in blank

hard

Fill both blanks to copy backup.tar.gz from the remote server to your local directory /backups.

Linux CLI

scp [1][2]backup.tar.gz /backups/

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

Auser@remote-server:

Buser@remote-server

C:

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Missing the colon after the remote server.

Not using the absolute path starting with slash.

Confusing the remote and local paths.

The source must be specified as user@remote-server:/backup.tar.gz. Here, user@remote-server: is the remote prefix and / starts the absolute path.

5fill in blank

hard

Fill both blanks to copy all .log files from your local logs folder to the remote server's /var/logs directory.

Linux CLI

scp [1] logs/*.log [2]:/var/logs/

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

A-r

Buser@remote-server

D-p

Attempts:

3 left

💡 Hint

Common Mistakes

Using -r unnecessarily for files only.

Omitting the colon after the remote server.

Confusing the order of arguments.

The -p option preserves file attributes. The destination must be specified as user@remote-server:/var/logs/.

Practice

1. What does the scp command do in Linux?

easy

A. Changes file permissions

B. Compresses files into a zip archive

C. Securely copies files between local and remote machines

D. Displays the contents of a file

Solution

1. Step 1: Understand the purpose of scp

   The scp command is designed to securely transfer files between computers over a network.

2. Step 2: Compare with other options

   Options A, B, and C describe different commands: permission changes, compression, viewing files, which are unrelated to scp.

3. Final Answer:

   Securely copies files between local and remote machines -> Option C

4. Quick Check:

   scp = Secure copy [OK]

Hint: Remember: scp = secure copy files remotely [OK]

Common Mistakes:

• Confusing scp with compression commands
• Thinking scp changes file permissions
• Assuming scp only works locally

2. Which of the following is the correct syntax to copy a file file.txt from your local machine to a remote server server.com under user alice in the directory /home/alice/?

easy

A. scp file.txt [e-mail]:/home/alice/

B. scp [e-mail]:/home/alice/ file.txt

C. scp /home/alice/file.txt [e-mail]:

D. scp file.txt /home/alice/[e-mail]

Solution

1. Step 1: Identify source and destination in scp syntax

   The syntax is scp source destination. Here, file.txt is local source, and [e-mail]:/home/alice/ is remote destination.

2. Step 2: Check each option

   scp file.txt [e-mail]:/home/alice/ correctly places local file first and remote path second. scp [e-mail]:/home/alice/ file.txt reverses source and destination. scp /home/alice/file.txt [e-mail]: uses remote path as source incorrectly. scp file.txt /home/alice/[e-mail] has wrong path format.

3. Final Answer:

   scp file.txt [e-mail]:/home/alice/ -> Option A

4. Quick Check:

   scp source destination = scp file.txt [e-mail]:/home/alice/ [OK]

Hint: Local file first, remote user@host:path second [OK]

Common Mistakes:

• Swapping source and destination
• Missing colon after remote host
• Incorrect path order

3. What will be the output or result of this command?
scp -r [e-mail]:/var/logs ./backup_logs
Assuming you have access and the remote directory exists.

medium

A. Copies the remote /var/logs directory recursively to local ./backup_logs folder

B. Copies only files inside /var/logs but not subdirectories

C. Throws an error because -r cannot be used with remote paths

D. Deletes the local ./backup_logs directory

Solution

1. Step 1: Understand the -r option in scp

   The -r flag means recursive copy, so it copies directories and their contents.

2. Step 2: Analyze the command effect

   The command copies the remote directory /var/logs from user alice on server.com to the local folder ./backup_logs. This is valid and copies all files and subfolders.

3. Final Answer:

   Copies the remote /var/logs directory recursively to local ./backup_logs folder -> Option A

4. Quick Check:

   scp -r remote:/path local copies folders recursively [OK]

Hint: Use -r to copy folders recursively from remote [OK]

Common Mistakes:

• Thinking -r only copies files, not folders
• Believing -r is invalid with remote paths
• Confusing copy direction

4. You run this command to copy a file from remote to local:
scp [e-mail]/home/alice/file.txt ./
But it fails with an error. What is the likely problem?

medium

A. scp cannot copy files from remote to local

B. Missing colon after the remote host before the path

C. Local path ./ is invalid

D. User alice does not have permission to copy files

Solution

1. Step 1: Check the remote path syntax

   Remote paths must be specified as user@host:/path with a colon after the host. The command misses the colon after server.com.

2. Step 2: Understand the error cause

   Without the colon, scp treats the whole string as a local path, causing failure.

3. Final Answer:

   Missing colon after the remote host before the path -> Option B

4. Quick Check:

   Remote path needs colon after host [OK]

Hint: Always put colon after remote host in scp paths [OK]

Common Mistakes:

• Omitting colon after remote host
• Assuming local path is wrong
• Thinking scp can't copy remote files

5. You want to copy multiple files file1.txt and file2.txt from your local machine to the remote directory /data/uploads on server example.com as user bob. Which command correctly does this in one line?

hard

A. scp file1.txt,[e-mail]:/data/uploads/ file2.txt

B. scp file1.txt file2.txt -r [e-mail]:/data/uploads/

C. scp [e-mail]:/data/uploads/ file1.txt file2.txt

D. scp file1.txt file2.txt [e-mail]:/data/uploads/

Solution

1. Step 1: Understand copying multiple files with scp

   scp supports copying multiple files by listing them before the destination path.

2. Step 2: Analyze each option

   scp file1.txt file2.txt [e-mail]:/data/uploads/ correctly lists both files followed by remote destination. scp file1.txt file2.txt -r [e-mail]:/data/uploads/ misplaces the -r flag after the sources, treating "-r" as a non-existent source file. scp [e-mail]:/data/uploads/ file1.txt file2.txt reverses source and destination. scp file1.txt,[e-mail]:/data/uploads/ file2.txt has invalid syntax with comma.

3. Final Answer:

   scp file1.txt file2.txt [e-mail]:/data/uploads/ -> Option D

4. Quick Check:

   List files then remote destination [OK]

Hint: List all files first, then remote destination [OK]

Common Mistakes:

• Misplacing the -r flag after source files
• Swapping source and destination
• Incorrect file list syntax