add domain name to hostname automatically when connecting to remote server

1. Before change:

danielh@ubuntu ~ $ ping zsi3
ping: unknown host zsi3

2. after change:

danielh@ubuntu ~ $ ping zsi3
PING zsi3.internet (10.216.21.168) 56(84) bytes of data.
64 bytes from zsi3.sto1.3s.intern (10.216.21.168): icmp_seq=1 ttl=255 time=1.51 ms

Here is the change:

danielh@ubuntu ~ $ sudo vi /etc/resolv.conf
search sto.internet
nameserver 127.0.1.1

sudo resolvconf -u