This is the content of /etc/bashrc, I would like to modify it for show root as red but don't know where to add the color code.# /etc/bashrc# System wide functions and aliases# Environment stuff goes in /etc/profile# It's NOT a good idea to change this file unless you know what you# are doing. It's much better to create a custom.sh shell script in# /etc/profile.d/ to make custom changes to your environment, as this# will prevent the need for merging in future updates.# are we an interactive shell?if [ $PS1 ]; then  if [ -z $PROMPT_COMMAND ]; then    case $TERM in    xterm*)        if [ -e /etc/sysconfig/bash-prompt-xterm ]; then            PROMPT_COMMAND=/etc/sysconfig/bash-prompt-xterm        else            PROMPT_COMMAND='printf \033]0;%s@%s:%s\007 ${USER} ${HOSTNAME%%.*} ${PWD/#$HOME/~}'        fi        ;;    screen)        if [ -e /etc/sysconfig/bash-prompt-screen ]; then            PROMPT_COMMAND=/etc/sysconfig/bash-prompt-screen        else            PROMPT_COMMAND='printf \033]0;%s@%s:%s\033\\ ${USER} ${HOSTNAME%%.*} ${PWD/#$HOME/~}'        fi        ;;    *)        [ -e /etc/sysconfig/bash-prompt-default ] && PROMPT_COMMAND=/etc/sysconfig/bash-prompt-default        ;;      esac  fi  # Turn on checkwinsize  shopt -s checkwinsize  [ $PS1 = \\s-\\v\\\$  ] && PS1=[\u@\h \W]\\$   # You might want to have e.g. tty in prompt (e.g. more virtual machines)  # and console windows  # If you want to do so, just add e.g.  # if [ $PS1 ]; then  #   PS1=[\u@\h:\l \W]\\$   # fi  # to your custom modification shell script in /etc/profile.d/ directoryfiif ! shopt -q login_shell ; then # We're not a login shell    # Need to redefine pathmunge, it get's undefined at the end of /etc/profile    pathmunge () {        case :${PATH}: in            *:$1:*)                ;;            *)                if [ $2 = after ] ; then                    PATH=$PATH:$1                else                    PATH=$1:$PATH                fi        esac    }    # By default, we want umask to get set. This sets it for non-login shell.    # Current threshold for system reserved uid/gids is 200    # You could check uidgid reservation validity in    # /usr/share/doc/setup-*/uidgid file    if [ $UID -gt 199 ] && [ `id -gn` = `id -un` ]; then       umask 002    else       umask 022    fi    # Only display echos from profile.d scripts if we are no login shell    # and interactive - otherwise just process them to set envvars    for i in /etc/profile.d/*.sh; do        if [ -r $i ]; then            if [ $PS1 ]; then                . $i            else                . $i >/dev/null 2>&1            fi        fi    done    unset i    unset pathmungefi# vim:ts=4:sw=4In Debian I do it in this line:PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u\[\033[00;37m\]@\[\033[01;34m\]\h\[\033[01;37m\]:\[\033[01;36m\]\w\[\033[01;35m\]\$\[\033[00m\] 'but in CentOS no idea.edit: Also I am thinking that maybe editing that file is going to take effect on both normal user and root user. But looking in the specifics .bashrc they only point to /etc/bashrc.
How to colorize root in red in CentOS?
centos;colors;bashrc
You will need to play with the colours, but something like this should do the trick.  Create the file /etc/profile.d/colours.sh with content similar to this:#!/bin/bashif [ $(id -u) -eq 0 >/dev/null  2>&1 ]; then  export PS1=\[\033[01;32m\]\u\[\033[00;37m\]@\h:\w\$ fi