grep in scripts in Bash Scripting - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to search for the word 'error' in the file 'log.txt'.

Bash Scripting

grep [1] log.txt

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

A"error"

B-r

C-v

D-i

Attempts:

3 left

💡 Hint

Common Mistakes

Using an option like -i without the pattern.

Forgetting to put the search word in quotes.

The correct syntax to search for the word 'error' is to provide it as a quoted string argument to grep.

2fill in blank

medium

Complete the code to search for the word 'fail' in 'report.txt' ignoring case.

Bash Scripting

grep [1] "fail" report.txt

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

A-r

B-v

C-i

D-c

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-v' which inverts the match.

Using '-c' which counts matches instead of showing them.

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

3fill in blank

hard

Fix the error in the script to count lines containing 'warning' in 'system.log'.

Bash Scripting

count=$(grep [1] system.log | wc -l)
echo $count

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

A"-c"

B"-i"

C"-v"

D"warning"

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-c' as a pattern instead of an option.

Putting options inside quotes as pattern.

The pattern 'warning' should be given as a string to grep. Using '-c' as a pattern is incorrect here.

4fill in blank

hard

Fill both blanks to create a script that searches recursively for 'TODO' in the current directory and shows line numbers.

Bash Scripting

grep [1] [2] "TODO" .

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

A-r

B-n

C-i

D-v

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-v' which inverts the match.

Using '-i' which ignores case but is not required here.

The '-r' option searches recursively, and '-n' shows line numbers in the output.

5fill in blank

hard

Fill all three blanks to create a script that searches for lines NOT containing 'debug' in 'app.log' and counts them.

Bash Scripting

grep [1] [2] "debug" app.log | wc [3]

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

A-v

B-i

C-l

D-c

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-c' which counts bytes instead of lines.

Forgetting to invert the match with '-v'.

The '-v' option inverts the match to exclude 'debug'. '-i' ignores case. '-c' counts the matching lines with wc.