Editing crontab (crontab -e) in Linux CLI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to open the crontab editor for the current user.

Linux CLI

crontab [1]

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

A-r

B-l

C-e

D-v

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-l' which lists the crontab instead of editing it.

Using '-r' which removes the crontab instead of editing.

The '-e' option opens the crontab editor for the current user.

2fill in blank

medium

Complete the crontab line to run a script every day at 5 AM.

Linux CLI

[1] 5 * * * /home/user/script.sh

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

A0

B5

C30

D15

Attempts:

3 left

💡 Hint

Common Mistakes

Putting 5 in the minutes field instead of the hour field.

Using 30 or 15 which run at 5:15 or 5:30 instead of 5:00.

The first field is minutes, so '0' means at minute zero of the hour (5:00 AM).

3fill in blank

hard

Fix the error in this crontab line to run a backup script every Sunday at midnight.

Linux CLI

0 0 * * [1] /usr/local/bin/backup.sh

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

A7

Bsun

C1

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using 7 which may not be supported on all systems.

Using 0 which can mean Sunday but is less readable.

The day of week field can be 'sun' to represent Sunday, which is clearer and valid.

4fill in blank

hard

Fill both blanks to run a cleanup script every 15 minutes.

Linux CLI

*/[1] * * * [2] /home/user/cleanup.sh

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

A15

B*

D*/15

Attempts:

3 left

💡 Hint

Common Mistakes

Using '*/15' in the hour field which is invalid.

Using '*' in the minutes field which runs every minute.

The minutes field uses '*/15' for every 15 minutes, so '15' is correct for the first blank and '*' for the day-of-week field means every day of the week.

5fill in blank

hard

Fill all three blanks to run a script at 2:30 PM on the first day of every month.

Linux CLI

[1] [2] [3] * * /home/user/monthly_report.sh

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

A30

B14

C1

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using 2 instead of 14 for the hour field.

Using 0 for the day of month which is invalid.

The minutes field is 30, hour is 14 (2 PM in 24-hour format), and day of month is 1 for the first day.