Basics querstions about Linux :

Hi ! I 'd like to know if it is possible to : - Connect to ADSL with command lines (rcsmpppd seems to do not work for connection) - Use YOU with a proxy (Does YOU use the proxy of the system, that is to say the proxy we configure in Yast or /etc/sysconfig ?) - How to create a .bashrc script for each session (Could you give me some examples of script files ?) - How to resolv the X application problem when using su under X (When I type su then root password under X, I have an error messages : "can't access to 0.0 port, something like that. I know that this matter was talked in this mailing list but I can't find the topic anyxay. Can I use the scripts in my .bashrc script ? Thanks for all response. Arnaud