grep -r for recursive search in Linux CLI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to search recursively for the word 'error' in all files.

Linux CLI

grep [1] error *

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

A-i

B-n

C-v

D-r

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-i' which ignores case but does not search recursively.

Using '-v' which inverts the match.

Using '-n' which shows line numbers but not recursive search.

The '-r' option tells grep to search recursively through directories.

2fill in blank

medium

Complete the code to recursively search for 'TODO' in the current directory and all subdirectories.

Linux CLI

grep [1] TODO .

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

A-l

B-r

C-c

D-q

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-l' which lists filenames but does not search recursively.

Using '-c' which counts matches but does not search recursively.

Using '-q' which suppresses output.

The '-r' option makes grep search recursively in the current directory '.' and its subdirectories.

3fill in blank

hard

Fix the error in the command to recursively search for 'main' ignoring case.

Linux CLI

grep -r [1] main ./src

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

A-n

B-v

C-i

D-c

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-v' which inverts the match.

Using '-n' which shows line numbers but does not ignore case.

Using '-c' which counts matches but does not ignore case.

The '-i' option makes grep ignore case when searching.

4fill in blank

hard

Fill both blanks to recursively search for 'config' and show line numbers.

Linux CLI

grep [1] [2] config /etc

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

A-r

B-i

C-n

D-v

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-v' which inverts matches instead of showing line numbers.

Using '-i' which ignores case but does not show line numbers.

Use '-r' for recursive search and '-n' to show line numbers of matches.

5fill in blank

hard

Fill all three blanks to recursively search for 'error' ignoring case and show filenames only.

Linux CLI

grep [1] [2] [3] error /var/log

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

A-r

B-i

C-l

D-n

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-n' which shows line numbers instead of filenames.

Mixing up the order of options but order does not affect grep.

Use '-r' for recursive, '-i' to ignore case, and '-l' to list filenames with matches.