sort and uniq in Linux CLI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to sort the contents of a file named names.txt.

Linux CLI

sort [1]

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

Anames.txt

B-r

C-u

Dnames

Attempts:

3 left

💡 Hint

Common Mistakes

Using options like -r or -u without the filename.

Typing the filename incorrectly.

The sort command followed by the filename sorts the file contents alphabetically.

2fill in blank

medium

Complete the code to show only lines that appear exactly once from names.txt after sorting.

Linux CLI

sort names.txt | uniq [1]

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

A-r

B-d

C-c

D-u

Attempts:

3 left

💡 Hint

Common Mistakes

Using -d which shows only duplicate lines.

Using -c which counts duplicates but does not remove them.

The uniq -u option shows only lines that appear exactly once.

3fill in blank

hard

Fix the error in the command to sort data.txt in reverse order and remove duplicates.

Linux CLI

sort [1] data.txt | uniq

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

A-d

B-u

C-r

D-c

Attempts:

3 left

💡 Hint

Common Mistakes

Placing options after the filename.

Using -u with sort which is invalid.

The -r option sorts in reverse order. It must come before the filename.

4fill in blank

hard

Fill both blanks to create a command that sorts list.txt ignoring case and shows only lines that appear exactly once.

Linux CLI

sort [1] list.txt | uniq [2]

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

A-f

B-c

C-i

D-u

Attempts:

3 left

💡 Hint

Common Mistakes

Using -i with uniq which is invalid.

Confusing -c with -u in uniq.

The -f option makes sort ignore case. The -u option makes uniq show only unique lines.

5fill in blank

hard

Fill all three blanks to create a command that sorts words.txt numerically, removes duplicates, and counts occurrences.

Linux CLI

sort [1] words.txt | uniq [2] | sort [3]

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

A-n

B-c

C-r

D-u

Attempts:

3 left

💡 Hint

Common Mistakes

Using -u with uniq when counting is needed.

Forgetting to sort numerically.

The first -n sorts numerically. The -c option with uniq counts occurrences. The last -r sorts the counted lines in reverse order.