Why do I get a “cannot execute csh…” error when I try to “sudo su”?

Question

I get this error when I try do sudo su

reputa@reputa:~$ sudo su
Cannot execute csh: No such file or directory

sudo -i is working fine but I want to use sudo su. How do I make it happen?

Answer 1

Your root's (su) profile is set to use csh instead of the usual bash.

Run sudo apt-get install tcsh to install it, and your problem should be solved.

Answer 2

You should better check your root's user default shell.

sudo gedit /etc/passwd

It should be /bin/bash