Hey Jul3z,

That's it, finally after a great struggle found the right way.

After following you tip i'm able to reach my requirment, but in the shell script (YourScriptHere.sh)
i'm calling a expect script. But while trying to do that the session quits. Do i want to add any
entries to run the expect script ?

Thanks a lot for the solution, waiting for your next suggestion.

I'm still not sure about what you're trying to do, but I will tell you some things anyway...

Catch the signals that may interrupt/stop the script. Run "help trap".

You may test it this way:
trap "echo Hey!" INT
^C
kill -INT $$

The signals you need to be aware of are:
SIGHUP - Hangup
SIGINT - ^C
SIGQUIT - ^\
and possibly:
SIGTSTP - ^Z

To test your script, see your key combinations with "stty -a".

The bash manpage states that:
The shell exits by default upon receipt of a SIGHUP. Before exiting, an interactive shell resends the SIGHUP to all jobs, running or stopped.

So you may use this signal to kill off any processes left running by the user:
trap "pkill -9 -U username" HUP

If you want to restrict shell access, then be warned that some programs may spawn a shell...
If you care about security, don't use telnet (specially if this account will use a shell). Use ssh instead.

Hi jul3z,

How are you ?

With your suggestion my process goes on very well, But a small query that
If i'm entering the script in file "/etc/passwd" it reaches my requirement but
at the same time the user is unable to login through FTP.

Is there any way to use the same user for both Telnet and FTP.

Awaiting your reply.

Yes, because they read the same files (/etc/passwd, shadow, etc.). The problem now is that the ftp daemon reads /etc/shells and refuses connection if the user's shell isn't a valid shell (ie, isn't listed in /etc/shells). Comment the line in /etc/pam.d/ftpd to be something like this:
The '#' above is a comment...


Note that ssh can replace telnet and ftp and it's more secure
(I couldn't resist...)

Hi Primo,

I have tried your option but still i'm unable to use the FTP for the user
abd able to login using the same user on Telnet port.

FYI : There is no file called "/etc/pam.d/ftpd" but instead of that file "ftp" in the path.

I'm using VSFTP on my Linux box.

Is there any other option ?