tee for splitting output in Linux CLI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to save the output of ls command to a file files.txt while still showing it on the screen.

Linux CLI

ls | [1] files.txt

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

Acat

Bgrep

Ctee

Dawk

Attempts:

3 left

💡 Hint

Common Mistakes

Using cat which only reads files.

Using grep or awk which filter or process text but don't split output.

The tee command splits the output so it goes both to the file and the screen.

2fill in blank

medium

Complete the code to append the output of date command to log.txt while still showing it on the screen.

Linux CLI

date | [1] -a log.txt

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

Atee

Bcat

Chead

Dtail

Attempts:

3 left

💡 Hint

Common Mistakes

Using cat which does not write output to files.

Using head or tail which only show parts of input.

The -a option with tee appends output to the file instead of overwriting it.

3fill in blank

hard

Fix the error in the code to save output of echo Hello to greeting.txt and still show it on screen.

Linux CLI

echo Hello | [1] greeting.txt

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

Acat

Btee

Cecho

Dls

Attempts:

3 left

💡 Hint

Common Mistakes

Using cat which reads files but does not write output here.

Using echo or ls which do not split output.

Only tee can split output to file and screen. Others do not work here.

4fill in blank

hard

Fill both blanks to save output of ps aux to processes.txt and append output to all_processes.txt while showing on screen.

Linux CLI

ps aux | [1] processes.txt | [2] -a all_processes.txt

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

Atee

Bcat

Dgrep

Attempts:

3 left

💡 Hint

Common Mistakes

Using cat which does not split output.

Using grep which filters but does not write to files.

The first tee writes to processes.txt. The second tee -a appends to all_processes.txt.

5fill in blank

hard

Fill all three blanks to save output of find . -type f to files.txt, append to all_files.txt, and filter lines containing .txt.

Linux CLI

find . -type f | [1] files.txt | [2] -a all_files.txt | [3] '.txt'

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

Atee

Cgrep

Dcat

Attempts:

3 left

💡 Hint

Common Mistakes

Using cat which does not write output to files.

Using grep before tee which changes output flow.

First two blanks use tee to write and append files. Last blank uses grep to filter lines.