root user not executing commands in shell script in a remote machine

Question

I have created a shell script as given below.But it is not reading username and password.What Iam expecting form this script is to login as a normal user to a remote machine and login to root user to run some commands there.

ssh -t [email protected] '
  echo "user logined !";
  su root -c "
    echo Give username :;
    read username;
    echo Give password :;
    read password;
    echo $username;
    echo $password;
  ";
'

Why do you not log in to 10.3.2.0 as root to start?

chepner
– chepner

2013-03-05 16:18:18 +00:00
Commented Mar 5, 2013 at 16:18 — chepner
– chepner, Commented Mar 5, 2013 at 16:18

Christopher Neylan · Accepted Answer · 2013-03-05 18:24:46Z

3

You need to escape the $'s for the variables inside the quotes:

ssh -t [email protected] '
  echo "user logined !";
  su root -c "
    echo Give username :;
    read username;
    echo Give password :;
    read password;
    echo \$username;
    echo \$password;
  ";
'

Otherwise, the shell created by the ssh command as the qbadmin user is going to perform string interpolation on $username and $password before executing the su command.

answered Mar 5, 2013 at 18:24

Christopher Neylan

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