No csh or tcsh?

Solution 1:

As with any software in Ubuntu you need to install it:

sudo apt-get install csh

and you can use csh on command line to start it.

Same for tcsh (is in Universe):

sudo apt-get install tcsh

and you can use tcsh on command line to start it.

By the way had you typed csh in command line you would have seen:

csh
The program 'csh' can be found in the following packages:
 * csh
 * tcsh
Try: sudo apt-get install <selected package>

The Ubuntu.com wiki explains how to switch permanently:

Changing your login shell which is permanent

You will use a program called chsh. There is a interactive method and non-interactive method. Type this into your terminal.

INTERACTIVE METHOD

chsh

This results in a brief dialog in which the user is prompted first for its password and then for the full path of the desired new shell.

Caution should be exercised when changing one's default shell because it is possible to make an error that only the root user (i.e., system administrator) can repair (although it should be easy for a skilled user to repair it on a home system). In particular, it is important to first test the shell temporarily in the current session and then to make certain that a valid shell name is being entered when making the permanent change.

NON-INTERACTIVE METHOD

I will use csh as again an example.

chsh -s /bin/csh

The -s sets it for you without having to go into the editor to do it.

Okay you did the command and it went ok.but the echo says it is the same. Log out and back it for the change to take effect.Then do echo $SHELL. You should see it show the new shell.

Solution 2:

Install tcsh:

sudo apt-get install tcsh

Set tcsh as your login shell:

chsh -s /bin/tcsh

After your next login tcsh will be used as your interactive shell.