Create a Linux User with non-interactive shell

Question :  Create a Linux User with a non-interactive shell The System Admin Team of XfusionCorp Industries has installed a backup agent tool on all app servers. As per the tool's requirements, they need to create a user with a non-interactive shell. 

In this article, we'll discuss a way to create new user with non-interactive shell using the useradd command.

useradd may be a low level utility for adding users. On Debian, administrators should usually use adduser(8) instead.

Most of them task got fail because of there's no bin file exist in path /bin/nologin

For non interactive user you'll used 2 options below

• /sbin/nologin is specifically designed to switch a shell and produces output complaining you cannot log-in.

• where as /bin/false doesn't give output

-s, --shell SHELL

The name of a replacement user's login shell. this feature sets the SHELL variable in /etc/default/useradd.

Server Name	IP	Hostname	User	Password	Purpose
stapp01	172.16.238.10	stapp01.stratos.xfusioncorp.com	tony	Ir0nM@n	App 1
stapp02	172.16.238.11	stapp02.stratos.xfusioncorp.com	steve	Am3ric@	App 2
stapp03	172.16.238.12	stapp03.stratos.xfusioncorp.com	banner	BigGr33n	App 3

Solution:  

1. At first login to the respective mentioned server in the task. Mine is stapp02

thor@jump_host /$ ssh steve@stapp02 The authenticity of host 'stapp02 (172.16.238.11)' can't be established. ECDSA key fingerprint is SHA256:NgyY+fBF5b56d9UEyUmbNHqK7eZTbk5n5/Ypr19rQkk. ECDSA key fingerprint is MD5:ef:d2:32:cb:57:6f:44:cb:0c:0b:4f:82:f0:dc:92:70. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'stapp02,172.16.238.11' (ECDSA) to the list of known hosts. steve@stapp02's password: [steve@stapp02 ~]$ [steve@stapp02 ~]$ sudo su -  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 steve: [root@stapp02 ~]#

2.  1st check user is existed on the server  by below command    

[root@stapp02 ~]# id ravi id: ravi: no such user [root@stapp02 ~]#

3.  If the user is not found the then you create a user with a non-interactive shell    

[root@stapp02 ~]# adduser ravi  -s /sbin/nologin [root@stapp02 ~]#

4.  Validate user is created successfully as per the task request.      

[root@stapp02 ~]# id ravi uid=1002(ravi) gid=1002(ravi) groups=1002(ravi)  [root@stapp02 ~]# cat /etc/passwd |grep ravi ravi:x:1002:1002::/home/ravi:/sbin/nologin [root@stapp02 ~]#

5.  Click on Finish & Confirm to complete the task successful

Happy Learning!!!!

Apart from this if you need more clarity,  I have made a  tutorial video on this , please go through and share your comments. Like and share the knowledge