Writing to files (echo, printf) in Bash Scripting - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to write the text 'Hello World' into a file named output.txt using echo.

Bash Scripting

echo "Hello World" [1] output.txt

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

A>>

B>

C<

D|

Attempts:

3 left

💡 Hint

Common Mistakes

Using >> appends instead of overwriting.

Using < which is for input redirection.

Using | which pipes output to another command.

The > operator redirects the output of echo to a file, overwriting it if it exists.

2fill in blank

medium

Complete the code to append the text 'New Line' to the file log.txt using echo.

Bash Scripting

echo "New Line" [1] log.txt

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

A>>

B>

C<

D|

Attempts:

3 left

💡 Hint

Common Mistakes

Using > which overwrites the file.

Using < which is for input redirection.

Using | which pipes output to another command.

The >> operator appends the output to the file without overwriting existing content.

3fill in blank

hard

Fix the error in the code to write formatted text with printf into file.txt.

Bash Scripting

printf "Name: %s\n" [1] > file.txt

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

AJohn

B'John'

C"John"

DName

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting the string, causing errors or unexpected output.

Using single quotes which may not expand variables if used.

Passing a bare word that is not defined.

The argument to printf must be a string without quotes stripped by the shell, so use the string without quotes.

4fill in blank

hard

Fill both blanks to create a file with numbers 1 to 5, each on a new line, using printf and a loop.

Bash Scripting

for i in {1..5}; do printf "[1]\n" [2]; done > numbers.txt

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

A%d

Bi

C$i

D%s

Attempts:

3 left

💡 Hint

Common Mistakes

Using i without $ which is treated as a string.

Using %s which is for strings, not numbers.

Not redirecting output to the file.

Use %d as the format for integers and $i to pass the current loop value to printf.

5fill in blank

hard

Fill all three blanks to create a file with squares of numbers 1 to 3 using printf and arithmetic expansion.

Bash Scripting

for n in {1..3}; do printf "[1]: [2]\n" [3] $((n*n)); done > squares.txt

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

ANumber

BSquare

Cn

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same label twice.

Using incorrect variable names.

Not using arithmetic expansion correctly.

Use 'Number' and 'Square' as labels, and 'n' as the variable for the number in the loop.