Linux User Setup with Non-Interactive Shell-Task 1

DevOps
#1

I am having this with task as i dont understand where i am going wrong.

Kindly check the error details and advise accordingly.

172.16.239.3 172.16.238.3 172.17.0.8
thor@jumphost ~$ curl ifconfig.me
35.188.139.128thocurl ipinfo.io/ipl ipinfo.io/ip
35.188.139.128thor@jumphost ~$ ssh [email protected]
^C
thor@jumphost ~$ ssh [email protected]
The authenticity of host ‘172.16.239.3 (172.16.239.3)’ can’t be established.
ED25519 key fingerprint is SHA256:zwt1ibm6tzmfhNcFSna5qisQtjodNki8X2RQVFl7dtU.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added ‘172.16.239.3’ (ED25519) to the list of known hosts.
[email protected]’s password:
Last login: Wed Jan 14 18:44:16 2026
thor@jumphost ~$ sudo useradd -s /sbin/nologin mark

We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:

#1) Respect the privacy of others.
#2) Think before you type.
#3) With great power comes great responsibility.

[sudo] password for thor:
thor@jumphost ~$ su - mark
Password:
su: Authentication failure
thor@jumphost ~$

#2

You are not creating the user on the correct server.

The question will have said something like

Create a user named mark with a non-interactive shell on App Server 2

You have

  1. Done ssh [email protected], which has effectively done nothing. It’s logged you back into the server you start on as the same user.
  2. Created user mark on jumphost (the server you start on) which would not have been in the question.

You need to ssh to the given app server from the question (could be 1, 2 or 3), using the appropriate credentials from here. Then become root there and create the requested user.