Enter preferred shell when you cannot change the default shell

Question

In my production environment, my default shell is an old version of csh and I cannot change it. How can I correctly login to my preferred shell? In particular, I would like to use bash. However the system bash is also very old so I compiled a newer version in ~/bin. The perfect scenario will be, I am using ~/bin/bash after login (e.g., ssh).

Answer 1

Put something like:

exec ~/bin/bash

in your login script (that's .login for csh).

Answer 2

Inside your .cshrc you could put an exec ~/bin/bash.

This executes bash when csh is loaded.

Answer 3

you need to be able to edit your /etc/passwd file

root:x:0:0:root:/root:/bin/bash

the last part is the shell loaded on login, If you want to use one in your home dir change the /bin/bash to new shell