Script testing strategies in Bash Scripting - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to run a script and check its exit status.

Bash Scripting

bash [1]; echo $?  # Prints the exit status of the script

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

Amyscript.sh

Brun.sh

Cscript.py

Dtest.sh

Attempts:

3 left

💡 Hint

Common Mistakes

Using a Python script name instead of a bash script.

Forgetting to specify the script file name.

The command 'bash myscript.sh' runs the script named 'myscript.sh'.

2fill in blank

medium

Complete the code to test if a variable is empty in a bash script.

Bash Scripting

if [ -z [1] ]; then echo "Empty"; fi

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

A$var

Bvar

C"var"

D$var.txt

Attempts:

3 left

💡 Hint

Common Mistakes

Not using the $ sign before the variable name.

Using quotes incorrectly around the variable.

The syntax '-z $var' checks if the variable 'var' is empty.

3fill in blank

hard

Fix the error in the code to correctly test if a file exists.

Bash Scripting

if [[ -f [1] ]]; then echo "File exists"; fi

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

Afilename.txt

Bfilename

C"filename"

D$filename

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting the $ sign before the variable.

Using single brackets [ ] with variable without quotes.

Use '$filename' to reference the variable holding the file name.

4fill in blank

hard

Fill both blanks to create a loop that tests each file in a directory.

Bash Scripting

for file in [1]; do if [[ -f [2] ]]; then echo "$file exists"; fi; done

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A"*"

B$file

Cfile

D"file"

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting the '*' wildcard.

Using 'file' without $ to reference the variable.

The loop iterates over all files with '*', and tests each with '$file'.

5fill in blank

hard

Fill all three blanks to create a function that tests if input is a directory and prints a message.

Bash Scripting

check_dir() {
  if [[ -d [1] ]]; then
    echo "[2] is a directory"
  else
    echo "Not a directory"
  fi
}

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

A$1

B"$1"

Dinput

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting the variable, causing errors with spaces.

Using variable names instead of positional parameters.

Use "$1" to safely reference the first argument as a directory path and print it.