I get the # when ever I log into terminal as su
how do I change it to show [root@domanName]currentDir# ?
I've added a /etc/bashrc and this inside of it. 

#if [[ $EUID == 0 ]] ; then

if [[ id == 0 ]] ; then

export PS1="\[\e[41m\]\u\[\e[m\]@\[\e[41m\]\h\[\e[m\]\w# "

else
 export PS1="\u@\h\w $"
fi

 this only shows 
[\u@\h:\w] $

and changes the shell to sh no longer giving me history using the arrows on 
the keyboard. 

what file and where did you (void creators) hide it so I can modify it to 
get it to show a prompt I like more better then just #

and why it is such a hard subject to find an answer to on the internet?