sorry b and c

it is B and C , please update

The right solution is B and C logger Howdy is used to send a message to the system log from the command line. systemd-cat is used to connect a command to the journal, and echo Howdy sends the message "Howdy" to systemd-cat, which in turn sends it to the journal.

Why this answer is not fixed if its wrong?

Ok, i tested all the options B & C are correct. There is no ADD option in "journalctl"

B. logger Howdy C. systemd-cat echo Howdy

"while we send a log manually from our Debian clien" https://learning.lpi.org/en/learning-materials/102-500/108/108.2/108.2_01/#:~:text=while%20we%20send%20a%20log%20manually%20from%20our%20Debian%20client

"Just like how the logger command is used to send messages from the command line to the system log (as we saw in the previous lesson), the systemd-cat command serves a similar — but more well-rounded — purpose with the system journal." https://learning.lpi.org/en/learning-materials/102-500/108/108.2/108.2_02/#:~:text=Just%20like%20how%20the%20logger%20command%20is%20used%20to%20send%20messages%20from%20the%20command%20line%20to%20the%20system%20log%20(as%20we%20saw%20in%20the%20previous%20lesson)%2C%20the%20systemd%2Dcat%20command%20serves%20a%20similar%E2%80%89%E2%80%94%E2%80%89but%20more%20well%2Drounded%E2%80%89%E2%80%94%E2%80%89purpose%20with%20the%20system%20journal.

correct are B and C

B and C - tested on Red Hat and worked. E is WRONG, give error: [root@xxxxx ~]# journalctl add TEST Failed to add match 'add': Invalid argument Failed to add filters: Invalid argument

B and C

BC are correct below is why systemd-cat and logger commands: are used to send messages from the command line to the system log. The systemd-cat command serves a similar — but more well-rounded — purpose with the system journal. It allows us to send standard input (stdin), output (stdout) and error (stderr) to the journal. If invoked with no parameters, it will send everything it reads from stdin to the journal. Once you are done, press Ctrl+C:. The logger command comes in handy for shell scripting or for testing purposes. logger will append any message it receives to /var/log/syslog (or to /var/log/messages when logging to a remote central log server as you will see later in this lesson):

This answer is incorrect. It says select two but only one is provided as correct answer Correct answer is B and C Test it: 1. On one tab listen to journal logs journalctl -f 2. On another tab do logger Howdy systemd-cat echo Howdy Both will appear in the output of journalctl -f command Hence the correct answer is B,C

I have tested on Ubuntu, its answer B + C. "journalctl add" : 'add' -Invalid argument

In the first 60 questions of this test there is approximately 8 questions that can cause confusion when choosing the correct options. This one is the worst , it asks you to choose 2 options but only reports 1 answer. The answer it reports is way out.

There is no -add option within the man page for journalctl so option D must be incorrect. systemd-cat is definitely correct. The question asks for 2 choices so the only other option left for me is logger . My answers would be B & C

B and C