[azatoth] jann>erl -name bar@127.0.0.1
Erlang (BEAM) emulator version 5.5.2 [source] [async-threads:0] [hipe] [kernel-poll:false]

Eshell V5.5.2  (abort with ^G)
(bar@127.0.0.1)1> 

and in another shell:

[azatoth] jann>erl -name foo@127.0.0.1 -eval "net_kernel:connect_node('bar@127.0.0.1')."
Erlang (BEAM) emulator version 5.5.2 [source] [async-threads:0] [hipe] [kernel-poll:false]

Eshell V5.5.2  (abort with ^G)
(foo@127.0.0.1)1> nodes().
['bar@127.0.0.1']
(foo@127.0.0.1)2>