Dans ~/.bash_profile, ajouter les lignes :

BLACK=$(tput setaf 0)
RED=$(tput setaf 1)
GREEN=$(tput setaf 2)
YELLOW=$(tput setaf 3)
BLUE=$(tput setaf 4)
MAGENTA=$(tput setaf 5)
CYAN=$(tput setaf 6)
WHITE=$(tput setaf 7)

PS1='${CYAN}\u@\h${WHITE} in ${GREEN}\w${WHITE}\r\n$ '