journalctl for systemd logs in Linux CLI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to show all systemd logs.

Linux CLI

journalctl [1]

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

A-f

B-b

C-u

D--no-pager

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-b' shows logs only from the current boot.

Using '-u' requires a service name and filters logs for that service.

Using '-f' follows logs live but does not show all past logs.

The option '--no-pager' shows all logs without paging, displaying the full output at once.

2fill in blank

medium

Complete the command to show logs only for the sshd service.

Linux CLI

journalctl [1] sshd.service

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

A--since

B-b

C-u

D-f

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-b' shows logs from current boot but not filtered by service.

Using '--since' filters by time, not service.

Using '-f' follows logs live but does not filter by service.

The '-u' option filters logs for a specific systemd unit, here 'sshd.service'.

3fill in blank

hard

Fix the error in the command to follow logs live for the nginx service.

Linux CLI

journalctl -u nginx.service [1]

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

A-f

B--no-pager

C--since today

D-b

Attempts:

3 left

💡 Hint

Common Mistakes

Using '--since today' shows logs only from today but does not follow live.

Using '--no-pager' disables paging but does not follow live.

Using '-b' shows logs from current boot but does not follow live.

The '-f' option makes journalctl follow logs live, showing new entries as they appear.

4fill in blank

hard

Fill both blanks to show logs from the current boot and disable paging.

Linux CLI

journalctl [1] [2]

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

A-b

B-u

C--no-pager

D-f

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-u' filters by service, not boot.

Using '-f' follows logs live, not needed here.

The '-b' option shows logs from the current boot, and '--no-pager' disables paging to show all logs at once.

5fill in blank

hard

Fill all three blanks to show logs for the cron service since yesterday and follow live.

Linux CLI

journalctl [1] cron.service [2] yesterday [3]

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

A-u

B--since

C-f

D--no-pager

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-b' instead of '--since' does not filter by time.

Using '--no-pager' disables paging but does not follow live.

Forgetting '-f' means logs won't update live.

Use '-u' to filter by cron service, '--since' to specify time from yesterday, and '-f' to follow logs live.