login scripts for easy use

after terminal login, i usually change the following login script for convenient use:

(1) by default, the user is zaurus.
/home/zaurus/.profile
if [-f ~/.bashrc]; then
. ~/.bashr;
fi
su

that makes the login change to root automatically

(2) adding some useful alias
/home/zaurus/.bashrc
PS1="[\u@\w]\$ "
alias ff="find / | grep"
alias la="ls -a"

(3) copy /home/zaurus/.bashrc to /home/root