LFCS Mock Exam 3

LFCS
#1

ssh node01 ssh: Could not resolve hostname node01: Name or service not known

#2

Which question number (which you should also include in this kind of question)? I’m going to guess Q10. If so, it worked for me when I tried it:

bob@caleston-lp10 ~ ➜  ssh bob@node01
The authenticity of host 'node01 (192.168.182.155)' can't be established.
ED25519 key fingerprint is SHA256:Yw7tfTZ52yU8lB28oE8Ej7XLiKC1T1Uu3jNYLhfc0Gk.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'node01' (ED25519) to the list of known hosts.
bob@node01's password: 
Welcome to Ubuntu 22.04.5 LTS (GNU/Linux 5.15.0-164-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/pro

 System information as of Sat Apr  4 18:56:40 UTC 2026

  System load:  0.0               Processes:             145
  Usage of /:   19.4% of 9.51GB   Users logged in:       0
  Memory usage: 11%               IPv4 address for eth0: 192.168.182.155
  Swap usage:   0%



bob@node01 ~ ➜

Please give it another try; if this happened, I’d guess it was something transient.

#3

Hi @rob_kodekloud , thank for your response.

It isn’t transient even if I try now i get the same error. And yes question 10

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#4

Hmm if i don’t attempt any question node01 is accessible. Is any of the answers to the previous question somehow impacting the local DNS? :thinking:

#5

That had occurred to me. I don’t see anything that is likely to interfere, but that’s something to check.

#6

I have the same issue. I also had some issues when trying to run the “netplan try” command in question 3, after removing one of the routes. I am also not able to install ntp-server or really connect to any remote package repository defined in apt (question 16). So seems network-related?

#7

I have the same issue.

Since this is an old thread, and it’s been over several issues, please tell me what issue that is :slight_smile: If it’s the “ssh node01” issue, I can’t replicate it.

I also had some issues when trying to run the “netplan try” command in question 3, after removing one of the routes.

What did you try, what happened?

I am also not able to install ntp-server or really connect to any remote package repository defined in apt (question 16).

I tried this, and don’t have a problem here. Why do you think this was “network related”?

Thanks; a bit of clairification will help me help you here.

#8

Hey @rob_kodekloud,

I also had multiple issues with LFCS Mock Exam 3. I’ve given this exam a try twice over the last 2 weeks with the same outcome:

  • Could not resolve hostname node0
  • Missing folders for the assignments (e.g., /opt/files)
  • Wrong results verification: all tasks were marked as incorrect at the end of the exam, even though most solutions were exactly the same as what I had done.
#9

If you’ll give me the question number in ME3 for your issues, I’ll give this a look. Thanks!