Process substitution (<() and >()) in Bash Scripting - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to use process substitution to compare the contents of two files.

Bash Scripting

diff <([1] file1.txt) <(cat file2.txt)

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

Als

Bcat

Cecho

Dgrep

Attempts:

3 left

💡 Hint

Common Mistakes

Using commands like ls which list files instead of reading contents.

Using echo which does not read file contents.

The cat command reads the contents of file1.txt and provides it as input via process substitution.

2fill in blank

medium

Complete the code to redirect the output of a command to a file using process substitution.

Bash Scripting

tee >( [1] > output.log ) < input.txt

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

Als

Becho

Ccat

Dgrep

Attempts:

3 left

💡 Hint

Common Mistakes

Using ls which lists directory contents instead of writing output.

Using echo which does not read from input.

The cat command reads from the process substitution and writes to output.log.

3fill in blank

hard

Fix the error in the code to correctly use process substitution to sort and compare two files.

Bash Scripting

diff <(sort [1]) <(sort file2.txt)

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

Afile3.txt

Bfile2.txt

C-r

Dfile1.txt

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong filename inside the process substitution.

Using options like -r without a filename.

The command sorts file1.txt and file2.txt before comparing them with diff.

4fill in blank

hard

Fill both blanks to create a command that compares the output of two commands using process substitution.

Bash Scripting

diff <([1]) <([2])

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

Aps aux

Bls -l

Ccat file.txt

Decho Hello

Attempts:

3 left

💡 Hint

Common Mistakes

Using commands that produce no output or static text.

Using the same command twice without reason.

This command compares the list of running processes with the detailed list of files in the current directory.

5fill in blank

hard

Fill all three blanks to create a pipeline that writes the output of a command to a file and also processes it.

Bash Scripting

command | tee >( [1] ) | [2] | [3]

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

Acat > output.txt

Bgrep error

Cwc -l

Dsort

Attempts:

3 left

💡 Hint

Common Mistakes

Not redirecting output properly to the file.

Using commands in the wrong order.

The pipeline writes the command output to output.txt, filters lines containing 'error', then counts those lines.