Disk space monitoring script in Bash Scripting - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check disk usage of the root directory.

Bash Scripting

usage=$(df -h / | tail -1 | awk '[1]')

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

A{print $3}

B{print $1}

C{print $5}

D{print $6}

Attempts:

3 left

💡 Hint

Common Mistakes

Selecting the wrong column number with awk.

Forgetting to use tail to get the last line.

The awk command extracts the fifth column, which shows the disk usage percentage.

2fill in blank

medium

Complete the code to send an alert if disk usage is above 80%.

Bash Scripting

if [ ${usage%\%} [1] 80 ]; then
  echo "Disk usage is above 80%!" 
fi

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

A-lt

B-gt

C-eq

D-le

Attempts:

3 left

💡 Hint

Common Mistakes

Using string comparison operators instead of numeric.

Not removing the percent sign before comparison.

The -gt operator checks if usage is greater than 80.

3fill in blank

hard

Fix the error in the command to get disk usage without the percent sign.

Bash Scripting

usage=$(df -h / | tail -1 | awk '{print $5}' | [1] '%')

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

Aawk '{gsub("%", ""); print}'

Bgrep -v '%'

Ccut -d '%' -f 1

Dsed 's/%//g'

Attempts:

3 left

💡 Hint

Common Mistakes

Using grep which filters lines instead of removing characters.

Using cut incorrectly with delimiters.

sed 's/%//g' removes all percent signs from the output.

4fill in blank

hard

Fill both blanks to create a loop that checks disk usage every 10 seconds and alerts if above 90%.

Bash Scripting

while true; do
  usage=$(df -h / | tail -1 | awk '[1]' | sed 's/%//g')
  if [ $usage [2] 90 ]; then
    echo "Warning: Disk usage is above 90%!"
  fi
  sleep 10
done

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

A{print $5}

B-lt

C-gt

D{print $4}

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong column number in awk.

Using the wrong comparison operator.

The loop extracts the usage percentage with awk '{print $5}' and checks if it is greater than 90 with -gt.

5fill in blank

hard

Fill all three blanks to create a script that logs disk usage with timestamp if usage is above 75%.

Bash Scripting

timestamp=$(date +"[1]")
usage=$(df -h / | tail -1 | awk '[2]' | sed 's/%//g')
if [ $usage [3] 75 ]; then
  echo "$timestamp - Disk usage: $usage%" >> /var/log/disk_usage.log
fi

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

A%Y-%m-%d %H:%M:%S

B{print $5}

C-gt

D{print $3}

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong date format string.

Extracting wrong column for usage.

Using incorrect comparison operator.

The timestamp format is %Y-%m-%d %H:%M:%S, usage is extracted from the fifth column, and the script checks if usage is greater than 75%.