File test operators (-f, -d, -e, -r, -w, -x) in Bash Scripting - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if a file named 'data.txt' exists.

Bash Scripting

if [ [1] data.txt ]; then
  echo "File exists."
fi

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

A-d

B-f

C-r

D-w

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-d' which checks for directories instead of files.

Using '-r' or '-w' which check permissions, not existence.

The '-f' operator checks if the file exists and is a regular file.

2fill in blank

medium

Complete the code to check if the directory '/home/user/docs' exists.

Bash Scripting

if [ [1] /home/user/docs ]; then
  echo "Directory exists."
fi

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

A-d

B-f

C-e

D-x

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-f' which checks for regular files, not directories.

Using '-e' which checks existence but not specifically for directories.

The '-d' operator checks if the path exists and is a directory.

3fill in blank

hard

Fix the error in the code to check if the file 'script.sh' is executable.

Bash Scripting

if [ [1] script.sh ]; then
  echo "File is executable."
fi

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

A-f

B-r

C-w

D-x

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-r' or '-w' which check read or write permissions instead.

Using '-f' which checks if it is a regular file but not executable.

The '-x' operator checks if the file is executable.

4fill in blank

hard

Fill both blanks to check if 'config.cfg' exists and is readable.

Bash Scripting

if [ [1] config.cfg ] && [ [2] config.cfg ]; then
  echo "Config exists and is readable."
fi

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

A-e

B-r

C-f

D-w

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-f' instead of '-e' for existence check.

Using '-w' instead of '-r' for read permission.

Use '-e' to check existence and '-r' to check read permission.

5fill in blank

hard

Fill all three blanks to create a dictionary of files in 'docs' directory that exist, are writable, and executable.

Bash Scripting

files_status = {file: ( [ -[1] file ] && [ -[2] file ] && [ -[3] file ]) for file in $(ls docs) }

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

Ae

Bw

Cx

Dr

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up read and write permissions.

Using '-f' instead of '-e' for existence.

Use '-e' for existence, '-w' for write permission, and '-x' for execute permission.