apt-get install libnotify-bin
gedit ~/.bashrc
alias alert_helper='history|tail -n1|sed -e "s/^\s*[0-9]\+\s*//" -e "s/;\s*alert$//"'
alias alert='notify-send -i /usr/share/icons/gnome/32x32/apps/gnome-terminal.png "[$?] $(alert_helper)"'
source ~/.bashrc
Ex: - Any command like ls;alert
