I tried installing csh, but it throws me the error:
csh
unable to locate package csh
My Ubuntu version is 12.04.
csh and tcsh both are available in the universe repository in precise (Ubuntu 12.04).
tcsh
universe
precise
You need to:
Enable the universe repository
Update local package list for repositories:
sudo apt-get update
Install csh, tcsh:
sudo apt-get install csh tcsh
From Ubuntu, the package is Ubuntu universe repository.
See this answer at AskUbuntu to enable the universe repository.
Then, type in the following commands:
sudo apt-get update sudo apt-get install csh