stdout redirection (>, >>) in Linux CLI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to redirect the output of echo Hello to a file named greeting.txt, overwriting the file if it exists.

Linux CLI

echo Hello [1] greeting.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 < is for input redirection, not output.

Using | pipes output to another command, not a file.

The single greater-than symbol (>) redirects the output to a file, overwriting it if it exists.

2fill in blank

medium

Complete the code to append the output of date to a file named log.txt without deleting existing content.

Linux CLI

date [1] log.txt

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

A>

B|

C<

D>>

Attempts:

3 left

💡 Hint

Common Mistakes

Using > overwrites the file, losing previous data.

Using < is for input, not output.

Using | sends output to another command.

The double greater-than symbol (>>) appends output to the file, keeping existing content.

3fill in blank

hard

Fix the error in the command to append the output of ls to files.txt.

Linux CLI

ls [1] files.txt

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

A|

B>

C>>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using > overwrites the file instead of appending.

Using < is for input redirection.

Using | pipes output to another command.

To add output to the end of a file, use >>. Using > overwrites the file.

4fill in blank

hard

Fill both blanks to redirect the output of echo Test to output.txt and then append date output to the same file.

Linux CLI

echo Test [1] output.txt
date [2] output.txt

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

A>

B>>

C<

D|

Attempts:

3 left

💡 Hint

Common Mistakes

Using >> for the first command overwrites nothing, just appends.

Using < is for input, not output.

Using | pipes output, not redirecting to file.

Use > to overwrite the file first, then >> to append to it.

5fill in blank

hard

Fill all three blanks to create a file summary.txt with the output of uname -a, then append the output of whoami, and finally append the current date.

Linux CLI

uname -a [1] summary.txt
whoami [2] summary.txt
date [3] summary.txt

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

A>

B>>

C<

D|

Attempts:

3 left

💡 Hint

Common Mistakes

Using > for all commands overwrites the file each time.

Using < is for input, not output.

Using | pipes output instead of redirecting to file.

Use > to create or overwrite the file first, then >> to append outputs.