For various reasons, I need to enable telnet access (over the private network), and when someone tries to log in with a specific user account (lets say
CheckStatus), instead of giving the user a shell it instead runs some very very quick code/script/whatever and returns one of two very specific strings. This account can have a password on it.
I'm essentially trying to replicate what happens when you try to SSH into Github's servers, where they tell you shell access is not granted.
I thought the solution to this would be to replace the user's shell, so I created the script:
#! /bin/bash echo "HI!!!"
then tried to set it as the user's shell via:
test@development-1:~$ chmod +x test.sh test@development-1:~$ chsh Password: Changing the login shell for test Enter the new value, or press ENTER for the default Login Shell [/bin/bash]: /home/test/test.sh chsh: /home/test/test.sh is an invalid shell
Any ideas on the best way to do this?
For reference, most of our systems are Ubuntu 14.04.