Linux/2-Config/bashrc

~/.bashrc

• color + root/username

if [ "$color_prompt" = yes ]; then
    if [[ ${EUID} == 0 ]] ; then
        PS1='${debian_chroot:+($debian_chroot)}\[\033[01;31m\]\u@\h\[\033[01;34m\] \W \$\[\033[00m\] '               # <- changes
    else
        PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\] \[\033[01;34m\]\w \$\[\033[00m\] '
    fi
else
    PS1='${debian_chroot:+($debian_chroot)}\u@\h \w \$ '
fi

• systemctl without page breaks

alias systemctl='systemctl --no-pager'

/etc/bash.bashrc

• autocomplete (uncomment to enable)

# enable bash completion in interactive shells
if ! shopt -oq posix; then
  if [ -f /usr/share/bash-completion/bash_completion ]; then
    . /usr/share/bash-completion/bash_completion
  elif [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
  fi
fi