Changing the default Shell from bash to csh & Aliases file.

[taalebi at ai.mit.edu]

Bash is currently the default shell running in my
	RedHat Linux 7.2 
environment. I have two questions:

1. How can I make the C-Shell the default shell instead?
   I can change my shell manually by typing "csh" in each "bash" session
   but I would like to make this change permanent.

2. I have a set of aliases for long command lines which I like ot have
   them automatically sourced when I login.
   Currently I manually do it from a bash shell by running:
	csh
	source <myAliasesFile>

   What should I call this file and where should I put it in order to
   have it automatically sourced in bash and/or csh shells?
   I have tried .aliases but it did not work!

Your hints and insights will be appreciated.
Thanks.
a.