Numeric permission mode (755, 644) in Linux CLI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to set permissions to 755 for the file named script.sh.

Linux CLI

chmod [1] script.sh

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

A644

B777

C755

D700

Attempts:

3 left

💡 Hint

Common Mistakes

Using 644 instead of 755 will remove execute permissions.

Forgetting to specify the filename after the mode.

The numeric mode 755 sets read, write, and execute for owner, and read and execute for group and others.

2fill in blank

medium

Complete the command to set permissions to 644 for the file named document.txt.

Linux CLI

chmod [1] document.txt

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

A644

B755

C600

D700

Attempts:

3 left

💡 Hint

Common Mistakes

Using 755 instead of 644 will give execute permissions unnecessarily.

Not specifying the filename after the mode.

The numeric mode 644 sets read and write for owner, and read-only for group and others.

3fill in blank

hard

Fix the error in the command to set permissions to 755 for the file named app.sh.

Linux CLI

chmod [1] app.sh

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

A755

B700

C644

D777

Attempts:

3 left

💡 Hint

Common Mistakes

Using 644 which lacks execute permissions.

Using 700 which restricts permissions too much.

755 is the correct numeric mode to give execute permission to owner, group, and others as needed.

4fill in blank

hard

Fill both blanks to create a command that sets permissions to 644 for file.txt and 755 for script.sh.

Linux CLI

chmod [1] file.txt && chmod [2] script.sh

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

A644

B755

C700

D600

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the numeric modes between the two files.

Using 700 or 600 which restrict permissions too much.

644 is for file.txt to allow read/write for owner and read for others; 755 is for script.sh to allow execute permissions.

5fill in blank

hard

Fill all three blanks to create a script that sets permissions 755 on run.sh, 644 on data.txt, and 700 on secret.txt.

Linux CLI

chmod [1] run.sh
chmod [2] data.txt
chmod [3] secret.txt

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

A755

B644

C700

D600

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up numeric modes for different files.

Using 600 instead of 700 for secret.txt which removes execute permission.

755 for run.sh to allow execution, 644 for data.txt for read/write owner and read others, 700 for secret.txt to restrict access to owner only.