PS1='[\u@192.168.196.73 \W]\$ '
Last login: Sun Jan  4 13:30:11 2015 from 192.168.199.162

clear;echo -e '\033[32mLogin 192.168.196.73 done. Enjoy it.\033[0m'
[halcyon@localhost ~]$ PS1='[\u@192.168.196.73 \W]\$ '
[halcyon@192.168.196.73 ~]$ clear;echo -e '\033[32mLogin 192.168.196.73 done. Enjoy it.\033[0m'
Login 192.168.196.73 done. Enjoy it.
[halcyon@192.168.196.73 ~]$ ls
[halcyon@192.168.196.73 ~]$