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Server

How do I configure users on my ubuntu system without shell and execute only one command?

Blason R

2/12/24, 2:44 PM

I need to build a Ubuntu server where users will be logged in but I dont want them to give a shell access. As soon as the user logs in one custom command will be executed and it will be allow certain options.

I do not allow user to log in on shell or run any other commands.

Can you please suggest?

TIA Blaon R

1 + 4

linux

ubuntu

bash

Zareh Kasparian

2/12/24, 4:25 PM

please explain more about the command you need to be executed.

Blason R

2/12/24, 4:33 PM

This is a custom bash script that I am going to write with case/esac stattement. May be by now we can take this script ``` #!/bin/bash echo -n "Tell me your name: " read resp echo $resp ```

Zareh Kasparian

2/12/24, 4:35 PM

you just need to run the command ? no need to login ?

Blason R

2/12/24, 4:36 PM

That is correct - I mean once user logs in directly that command will be executed and option will be given. I do not want any shell access to be given for any user

Score:0

Server

Zareh Kasparian

2/12/24, 5:48 PM

you just create your script as you said and place it in the user's home directory path(create the user with adduser command).

So for you case I written your script in shell-command.sh file.

#!/bin/bash
echo -n "Tell me your name: "
read resp
echo $resp

make the script executable.

 chmod a+x shell-command.sh

Open the /etc/passwd file and edit your desired user shell after his/her home directory path as below.

testuser:x:1001:1001:test user,,,:/home/testuser:/home/testuser/shell-command.sh

Done.

+ 3

Blason R

2/13/24, 5:54 AM

Thats great - Ididnt know that- Thanks though let me test it out

Blason R

2/13/24, 5:24 PM

Well this works but output does not stay on console. As soon as the command is entered the output disappears

Zareh Kasparian

2/13/24, 5:59 PM

what do you mean by saying console? are sshing to the remote server? or what ?

Elon Musk

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EN: How do I configure users on my ubuntu system without shell and execute only one command?

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